Tuesday, 14 September 2010

Ope-aand Boyden-sterrewag, Saterdag, 18 September 2010


Plek: Boyden-sterrewag (Langs Maselspoort)
Datum: Saterdag, 18 September 2010
Tyd: 18:30

BESPREKING IS NOODSAAKLIK!
  • Willie Koorts van die SAAO lewer praatjie oor Die Ingenieurswese agter Sterrekunde. Die lesing sal tweetalig wees met die skyfies in Engels.
  • Hennie Maas van RSG se Sterre en Planete kom maak twee opnames vir die radioprogram "Sterre en Planete" by die sterrewag. Prof Matie Hoffman en Willie Koorts  is die twee gaste wat om die beurte met die program help. Hierdie sessie is in Afrikaans
  • Waarnemings deur teleskope indien die weer dit toelaat o.a. van Jupiter, Venus en die maan.
Bel 051 401 9751 tydens kantoorure om te bespreek of stuur 'n epos aan FickY@ufs.ac.za

Toegang: R 30 per motor

Verversings en ligte etes te koop - Nuwe spyseniers!

Aangebied deur: Vriende van Boyden-sterrewag en die Amateur Sterrekunde Vereniging
Posted by at

Monday, 13 September 2010

More Photos: Venus and Moon Occultation 11 September 2010


 Click to enlarge image
Moon and Venus Occultation as seen from Boyden Observatory
Photo: Hannes Pieterse
Equipment: Canon 30D attached to Celestron 11 GPS (Prime focus) Tracking in Lunar mode.
ISO 400 and 1/2000 sec. Processed in Photoshop CS5

According to my computer clock and Camera exif info the moon started to move in front of Venus at 14:28:55. The exit time was give or take 15:36:39.
Posted by at

Foto's: Maan en Venus Okkultasie - 11 September 2010


Herman Bonnet van ASSA Bloemfontein se foto's
Canon 400D ISO 100, Skywatcher equinox 120,Eq 6
Klik op foto om te vergroot

Wesssel du Preez ASSA Bloemfontein stuur uit Senekal die
foto's wat hy met `n selfoon deur die oogstuk van `n Orion 8"dobsonion  geneem het.
Klik op foto om te vergroot

Posted by at

Friday, 10 September 2010

Shuttle se moer gestrip! Moer nou weg! NASA soek moer!



Discovery attachment to tank delayed by nut problem
Workers rotated Discovery upright last night for mating to the fuel
tank and boosters. Credit: Stephen Clark/Spaceflight Now
 Engineers attaching the shuttle Discovery to its external fuel tank ran into problems Friday when an internal nut used to attach a separation bolt to the belly of the orbiter slipped out of position. Re-positioning the mis-aligned nut will require access to the shuttle's aft engine compartment, sources said, but it was not immediately clear what might be required to provide that access with Discovery not yet firmly attached to its external tank.
 (Ok! 'n  Bolt is `n bout! Maar moer klink beter! Dit is toe `n "nut" en nie `n "bolt" nie!) 
    Posted by at

    How Microbes Could Help Colonize Mars




    Cyanobacteria fossil about 850 million years old from Bitter
    Springs in Central Australia. Credit: J. William Schopf
    by Jeremy Hsu
    for Astrobiology Magazine

    Moffett Field CA (SPX) Sep 10, 2010

    Tiny rock-eating microbes could mine precious extraterrestrial resources from Mars
    and pave the way for the first human colonists. Just don't expect them to transform
    the red planet's surface into a new Earth on a short deadline, researchers say.
    Posted by at

    Space station cargo vessel blasts off


    A robotic Russian resupply ship to service the International Space Station successfully launched atop a Soyuz rocket rocket today at 6:22 a.m. EDT (1022 GMT) from the Baikonur Cosmodrome in Kazakhstan. The freighter is carrying two-and-a-half tons of cargo, food and water for the high-flying laboratory.
    Photo credit: Energia
    Posted by at

    Wednesday, 8 September 2010

    Two Asteroids To Pass By Earth Wednesday (Today)


    Two small asteroids in unrelated orbits will pass
    within the moon's distance of Earth on Wed.
    Both should be observable with moderate-sized
    amateur telescopes.


    by Staff Writers    Pasadena CA (JPL) Sep 08, 2010
    Two asteroids, several meters in diameter and in unrelated orbits, will pass within the moon's distance of Earth on Wednesday, Sept. 8.
    Both asteroids should be observable near closest approach to Earth with moderate-sized amateur telescopes
    . Neither of these objects has a chance of hitting Earth.

    Read more... 

    Source: SpaceDaily
    Posted by at

    Monday, 6 September 2010

    11 September 2010 - Occultation of Venus by the moon on your doorstep

    Re Post with extra information

    Maak `n knoop in jou selfoon om hierdie okkultasie van Venus deur die maan nie mis te loop nie. Dit is in die dag en sal maklik met `n verkyker waargeneem kan word. Selfs met die blote oog. Venus verdwyn Saterdag 11 September om 14:29 agter die maan en verskyn dan weer om 15:47.  Die sekelmaantjie gaan hoog in die hemel sit en daardie klein ligpuntjie naby hom is Venus. Sien onder vir meer spesifieke tye.

    Times for the Free State
    Bethlehem 2:36 pm 3:48 pm
    Bloemfontein 2:29 pm 3:47 pm
    Harrismith 2:38 pm 3:50 pm
    Kroonstad 2:33 pm 3:45 pm
    Parys 2:34 pm 3:43 pm
    Smithfield 2:30 pm 3:50 pm

    Northern Cape
    Calvinia 2:14 pm 3:40 pm
    De Aar 2:24 pm 3:46 pm
    Hotazel 2:19 pm 3:37 pm
    Kimberley 2:25 pm 3:44 pm
    Springbok 2:08 pm 3:34 pm
    Sutherland 2:18 pm 3:44 pm
    Upington 2:15 pm 3:37 pm


    Hier is meer inligting: 

    11 Sep - Occultation of Venus for E Brazil & S Africa (daytime)
    Local Circumstances (Boyden Observatory - Bloemfontein)
    Longitude =  26° 14' 31" E
                             Latitude =  29° 01' 18" S
                            Elevation = 1114m.

                 Greatest Occultation = 2010-Sep-11 13:08:05.6 UT
                             Altitude =  76.4°
                              Azimuth = 338.3°

            Calendar Date and Time          Planet           Sun     Limb
                Universal Time         Azi    Alt    PA      Alt      PA
 
    Universal Time 
    Ingress    2010-Sep-11 12:29:18.8 d   18.6°  76.6°   88.0°   43.0°  295.3°
Egress     2010-Sep-11 13:47:08.7 b  309.3°  71.2°  328.4°   28.5°  295.2°
  Duration    77m 49.9s
     
    Graphic of disappearance and reappearance points as seen from Boyden Observatory 
    Graphic Source: TheSky6


     Click on images for a bigger view
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
NASA Satellites and Spacecraft Look Into the Eye of Hurricane Earl

    

    

    

    

    

    Click image to enlarge
    Hurricane Earl on Sept. 2, 2010 as seen by NASA's Terra Satellite. NASA image courtesy Jeff Schmaltz, MODIS Rapid Response Team
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    




    
ASSA Comet, Asteroid and Meteor Section

    

    

    

    

    

     CAMnote s2010 No.2
    

    
1)Review of 2010 year to date
    

    
2)Comet prospects for the coming months
    

    
3)Asteroids in need of observation
    

    
4) Meteor showers for October-December 2010

    

    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Monday, 30 August 2010
    

          
    
        

    

    





    
Wish John Dobson a happy 95 - One for all the dobi users!

    

    

    

    

    

    John Dobson

    

    John Dobson is arguably one the most influential personalities in  amateur astronomy in the last couple of decades. He has almost  single-handedly revolutionized backyard astronomy by bringing it out to  the street, making it possible for everyone to enjoy the beauty of the  Universe!

    

    On September 14 2010, John is turning 95 and here's your chance to send birthday wishes to him!

    

    • Go to this page and send him the best of wishes.   
      • 

    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Friday, 27 August 2010
    

          
    
        

    

    





    
Dark adaption 3

    

    

    

    

    

    The perfect astrotorch puts out a pure red beam that is dim enough not to harm dark adaptation. 
    

    
A too-bright red light can be nearly as harmful to night vision as a white light.
    

    
Get one with a strap, a dimmer control, and a sturdy housing 
    

    
Source: Getting the Most from Your Schmidt Cassegrain or Any Catadioptric Telescope - Rod Mollise

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
How to become a backyard Astronomer in 10 Easy steps

    

    

    

    

    

    


    

    Backyard Observing
    1. DON’T BUY A TELESCOPE — YET Cost: $0 2. BEFRIEND A BOOK - Cost: $0 to $40
    3. BEFRIEND THE SKY - Cost: Your timev
    4. TRY SOME SOFTWARE - Cost: $0 to $75 
    5. BUY BINOCULARS - Cost: $150 to $200
    6. FIND FELLOW ENTHUSIASTS - Cost: Your time 
    7. CRASH A PARTY - Cost: Gas money
    8. LEARN THE JARGON - Cost: Time and patience 
    9. OK, NOW BUY A TELESCOPE - Cost: $300 to $600
    10. AVOID ASTROPHOTOGRAPHY! - Cost: Nothing—you save hundreds of dollars and hours!

    


    

    Source: SkyNews.ca

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
How the 'LHC in space' lost its British 'engine'

    

    

    

    

    

    The mythical beast has been sighted. The Alpha Magnetic Spectrometer (AMS) has finally arrived at the Kennedy Space Center in Florida to begin final checks before being launched to the International Space Station (ISS) in February.
    

    
The AMSThe AMS has variously been described as the "LHC in space" and the "world's most expensive space experiment", besides a few other derogatory labels that have played on its $1.5bn price tag. 

    

    Visit the source BBC News for more information.

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
Secret X-37B Space Plane Has Changed Orbit

    

    

    

    

    


    
By Leonard David
    
SPACE.com's Space Insider Columnist    posted: 24 August 2010
    
12:57 am ET
    
         
    

    The U.S. Air Force's secretive X-37B space plane apparently boosted itself into a new orbit Aug. 9, according to reports from seasoned satellite trackers around the world, SPACE.com has learned.

    

    Visit Source for more information: www.space.com 
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
Solar System May Be 2 Million Years Older Than Thought

    

    

    

    

    

    The solar system may be up to two million years older than previously thought, a new study has found. 
    

    Researchers studying bits of a meteorite discovered that the space rock was 4.5682 billion years old, predating previous estimates of the solar system's age by up to 1.9 million years. This adjustment, though ever so slight, should help astronomers better understand how the sun and planets formed. 
    

    "We believe that, right now, this is the most precise and accurate date for the age of the solar system," said study co-author Meenakshi Wadhwa of Arizona State University.

    

     Visit Source: Space.com 
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
First light from the new solar telescope:

    

    

    

    

    

    

    Sunspot 1084 (Click on image to enlarge)
    This is a first                      light adaptive optics image from the New                      Solar Telescope (NST) at the Big Bear Solar Observatory                      in California. "With a 1.6-meter primary mirror, the                      NST is the largest solar telescope in the world," says                      Nicolas Gorceix of the observatory staff. "It has realtime                      correction for atmospheric distortion (adaptive optics), so                      we can see things in very high resolution--as small as 65                      km wide on the sun." 

    


    

    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
Gaan Mars ons vannag, as ons slaap, insluk?

    

    

    

    

    


    

    "No wonder... You're looking at ............"  (Fill in the town or city where you are staying).

    

    Miskien moet ons liewer nie vannag gaan slaap nie. Sê nou net!

    

    Hier is my teorie oor die twak wat via e-posse versprei word.

    

    27 Augustus het gekom en gegaan! 

    

    Hier sit ons nog.  Ok die dag het nog `n paadjie om te loop.

    

    Loer op die blog vir die absolute waarheid: Klik hier

    


    

    My eie conspiracy theory!  

    

    Hierdie twak wat rondgestuur word werk soos volg: Iemand - (wat die eerste boodskap uitstuur) begin om die e-pos aan `n paar ongelowiges te stuur. Dit word  dan van een ongelowige tot die volgende ongelowige gestuur. Soos `n  kettingbrief. 

    

    Die adresse word meer en meer. Later is daar duisende adresse. Die  ou wat die brief begin rondstuur het lag al die pad. Hy oes al die  adresse en stuur aan almal `n boodskap dat hulle bankbesonderhede  foutief is. 

    

    "Klik op hierdie skakel en gee vir my al jou bankbesonderhede want ek  wil jou van jou geld verlos!"  Of jy het $30 000 in die US-lotto gewen  (Lees eintlik Ponde en in die UK, maar ek kry nie die pondteken nie). Of  jy kan geld bydra vir `n arme kind wat verkrag is (wat nie bestaan nie)  se kos en klere en hele skoolloopbaan. 

    

    Daar is baie van die skelmstreke! 
    

    
(Vul jou dorp/stad  se naam in onder die foto, as jy dié twak glo!) 

    

    Terloops. Kliek op die boonste  skakel. Ons hou van baie besoekers op die blog. Stuur die adres aan  nog duisende mense sodat hulle presies kan weet wat aangaan. Stuur dan al die e-posadresse vir my. Ek kan dit baie goed gebruik. Ha! Ha! Ha! 
    
(The devil made me do it!   ;-)

    

    Om te bevestig dat Mars in `n verskriklike moeilike bui is: Klik hier 
    

    
Klik op die  O . As niks gebeur nie sal Mars nie so groot soos die maan word nie! 
    
- Doen dit op jou eie risiko.  

    

    Terloops. Die maan was Woensdag, 25 Augustus net na volmaan op sy verste punt van die aarde in die eliptiese baan waarin dit beweeg. Dit word apogee genoem. Dit was `n hele 406 388 km van die aarde af. Lees gerus jou Skyguide vir 2010 - Bladsy 30). 
    

    
- 17 Januarie 2010 was die maan ook in apogee. Verste weg van aarde (406 343 km)
    

    
- 20 Mei 2010, 10:30,  Maan in perigee. Naaste aan die aarde (369 733km)
    
- 25 Augustus 2010, 0730. Maan in apogee  (406 388 km vanaf aarde)
    
- 25 Desember 2010, Maan in perigee, (368 465 km vanaf aarde).
    

    
Apogee en Perigee: So lyk dit  
    
 
    
(Dis feite en nie versinsels nie). 

    

    Groete
    Hannes Pieterse
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Tuesday, 24 August 2010
    

          
    
        

    

    





    
Jupiter loop weer deur! Amateur sien dit.

    

    

    

    

    

    Rare flash of light seen on Jupiter in astral collision 
     A flash of light believed to be caused by astral matter colliding with Jupiter    has been captured on camera by an amateur astronomer in Japan. 
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
Southern African biennial Symposium of the ASSA

    

    

    

    

    

    

     The Pretoria branch of ASSA is proud to announce the dates for the  Southern African biennial Symposium of the ASSA.  The symposium will  take place at the Silverton campus of the Council for Geoscience on  Thursday 7 October 2010 and Friday 8 October 2010.  Click to download a  pdf or  doc registration file with full information. 
     The symposium will focus on light/spectrum pollution and people  interested in delivering papers are invited to send a short synopsis to  the Committee. See detail at: download pdf document 
    Please note that, due to the limited time that we have to  organise this symposium, the deadline for submission has been extended  and we will accept submissions up to 17 September 2010. 
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Sunday, 22 August 2010
    

          
    
        

    

    





    
11 September 2010 - Occultation of Venus by the moon for E Brazil & S Africa (daytime)

    

    

    

    

    

    Re Post with extra information 
    

    
Maak `n knoop in  jou selfoon om hierdie okkultasie van Venus deur die maan nie mis te  loop nie. Dit is in die dag en sal maklik met `n verkyker waargeneem kan  word. Selfs met die blote oog. Venus verdwyn Saterdag 11 September om  14:29 agter die maan en verskyn dan weer om 15:47.  Die sekelmaantjie  gaan hoog in die hemel sit en daardie klein ligpuntjie naby hom is  Venus. Sien onder vir meer spesifieke tye. 
    

    
Times for the Free State 
    
Bethlehem 2:36 pm 3:48 pm
    
Bloemfontein 2:29 pm 3:47 pm
    
Harrismith 2:38 pm 3:50 pm
    
Kroonstad 2:33 pm 3:45 pm
    
Parys 2:34 pm 3:43 pm
    
Smithfield 2:30 pm 3:50 pm
    

    
Northern Cape
    
Calvinia 2:14 pm 3:40 pm
    
De Aar 2:24 pm 3:46 pm
    
Hotazel 2:19 pm 3:37 pm
    
Kimberley 2:25 pm 3:44 pm
    
Springbok 2:08 pm 3:34 pm
    
Sutherland 2:18 pm 3:44 pm
    
Upington 2:15 pm 3:37 pm
    

    

    
  Hier is meer inligting:  
    


    

    11 Sep - Occultation of Venus for E Brazil & S Africa (daytime)
    Local Circumstances (Boyden Observatory - Bloemfontein)
    Longitude =  26° 14' 31" E
                             Latitude =  29° 01' 18" S
                            Elevation = 1114m.

                 Greatest Occultation = 2010-Sep-11 13:08:05.6 UT
                             Altitude =  76.4°
                              Azimuth = 338.3°

            Calendar Date and Time          Planet           Sun     Limb
                Universal Time         Azi    Alt    PA      Alt      PA
 
    Universal Time 
    Ingress    2010-Sep-11 12:29:18.8 d   18.6°  76.6°   88.0°   43.0°  295.3°
Egress     2010-Sep-11 13:47:08.7 b  309.3°  71.2°  328.4°   28.5°  295.2°
  Duration    77m 49.9s
     
    Graphic of disappearance and reappearance points  as seen from Boyden Observatory 
    

    Graphic Source: TheSky6


     Click on images for a bigger view
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Saturday, 21 August 2010
    

          
    
        

    

    





    
International Observe the Moon Night , Saturday, 18 September 2010

    

    

    

    

    

    Did you know? September 18, 2010  will mark the first ever International  Observe the Moon Night! This year’s InOMN  will be used as our pilot  year to inform  us on how to make it better and  more interactive. We’re  testing the waters and would love to hear from you about  how we’re  doing. The InOMN website is ever evolving, so please be sure to check   back often!

    

    Gaan besoek gerus die webblad en deurkruis dit.
     Wondelike downloads en skakels na al die kraters ens. wat jy op die maan kan sien.
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Friday, 20 August 2010
    

          
    
        

    

    





    
NGC 253, Sculptor Galaksie vanaf Boyden Sterrewag

    

    

    

    

    

    

      
    

    Hier is die Sculptor Galaxy wat ons gisteraand by Boyden afgeneem het. Die aand het nie glad verloop nie. Die tracking was af, wind het gewaai en ys op teleskoop het gemaak dat ons 03h00 moes oppak.

    

    Die Siver dollar het nogtans mooi uitgekom.

    

    2h 45min exposures van 5min subs.
    QHY9 c ccd deur 80mm Maxvision triplet refractor Guiding deur 8 duim bird jones reflector Nebulosity 2 PHD Photoshop CS 5

    

    Magnitude: 7.90 
    

     Afstand: 12.9 Mly
    

    

    Foto: Brett du Preez en Chris  Joubert 
    
ASSA Bloemfontein     
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
What on earth?

    

    

    

    

    
 
    

    When MESSENGER took this image, a distance of  183 million kilometers (114 million miles) separated the spacecraft and  Earth. To provide context for this distance, the average separation  between the Earth and the Sun is about 150 million kilometers (93  million miles).

    

    Read the article   and explore thew website 
    
Source: NASA Lunar Science Institute

    
 Auke Slotegraaf ons ASSA Dieplug-direkteur het my op die spoor gesit van die webblad via sy blog. Besoek dit gerus: psychohistorian.org
    

    
Opmerking: Hoe gaan die aarde vanaf  Andromeda se omgewing lyk. Die afstand is 2.6 miljoen ligjaar. Andromeda is die verste voorwerp wat met die blote oog gesien kan word. 
    

    
Nog feite uit die Wiki-omgewing: 
    

    
The Canis Major dwarf galaxy is classified as an irregular galaxy and is now thought to be the closest neighbouring galaxy to our location in the Milky Way, being located about 25,000 light-years away from our Solar System[2] and 42,000 light-years from the Galactic Center 
    

    

    
Vir my is die Kaap ver!
    
 
    
Groete
    

    
Hannes Pietersers

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Wednesday, 18 August 2010
    

          
    
        

    

    





    
Lagoon-newel vanaf Boyden-sterrewag

    

    

    

    

    

    

      
    

     Klik om te vergroot
    

    Lagoon-newel in Hydrogen alpha golflengte afgeneem  
    Beligting: 5 ure in totaal van 20x15min beligtings.
    Darkframes, Bias frames en flatframes bygewerk.
    Kamera: 8.6megapixel QHY9 kleur ccd-kamera.
    Teleskope: Maxvision f/6 80mm apochromatic triplet refractor met 'n 8 duim Jones Bird newtonian reflector f/7.
    Guiding gedoen deur reflector.
    Mount is 'n Skywatcher HEQ5 Pro.

    

    Foto: Brett du Preez en Chris  Joubert 
    
ASSA Bloemfontein      
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    




    
Boyden Sterrewag Ope-aand  |  Boyden Observatory Open Evening

    

    

    

    

    

    
Boyden Sterrewag Ope-aand 
    21-08-2010, 18h30 19:00


    18:30: Waarneming van Saturnus deur die 13” teleskoop      indien die weer dit toelaat
         
             19:00: Lesing
    
"Wat die Sterre van Pluto vertel"
    (Prof. Matie Hoffman, Mnr. Pat van Heerden en Ernie Halberg)
         Ernie Halberg vertel ook van die asteroide wat hy ontdek het.
    

           20:00: Waarnemings deur teleskope indien die weer dit toelaat
         
         Toegang: R 30 per motor
         Verversings en ligte etes te koop
         
         Aangebied deur:
         
         Vriende van Boyden Sterrewag en die
         Amateur Sterrekunde Vereniging

    

    Boyden Observatory Open Evening
         21-08-2010, 18h30 for 19:00
         
         The program includes observing through the telescopes weather permitting
         
         18:30: Observing Saturn through the 13” telescope     weather permitting

    19:00: Lecture 
    “What the stars reveal about Pluto”
    (Prof. Matie Hoffman, Mr. Pat van Heerden and Ernie Halberg)
         Ernie Halberg tells us about the asteroid he discovered.
         
         20:00: Observing through telescopes weather permitting
         
         Entrance: R 30 per car
         Refreshments and light meals for sale
    

             Presented by:
         Friends of Boyden Observatory and the 
         Amateur Astronomy Society    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Tuesday, 17 August 2010
    

          
    
        

    

    





    
Andromeda (M31) vanaf Boyden-sterrewag

    

    

    

    

    

    

    Klik om te vergroot

    
Details van Andromeda:
    
Data verkry deur Nebulosity en PHD.
    
Beligting: 120 min in totaal van 10 min beligtings.
    
Gestack in Deepsky Stacker met flatframes en bias frames.
    
Geen Darkframes nie. (Hotpixels verwyder d.m.v. 'n Bad pixel map)
    
Verder geprosesseer in Photoshop CS5 en Noel Carboni's tools.
    


    
Kamera: 8.6megapixel QHY9 kleur ccd-kamera.
    Teleskope: Maxvision f/6 80mm apochromatic triplet refractor met 'n 8 duim Jones Bird newtonian reflector f/7.
    Guiding gedoen deur reflector.
    Mount is 'n Skywatcher HEQ5 Pro.
    Foto: Brett du Preez en Chris  Joubert
    
ASSA Bloemfontein
    

    
M110 is ook sigbaar (regs) 
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

    

    





    
Dark adaptation 2

    

    

    

    

    

    Much better than the traditional flashlight and red filter, however, is a  red LED (light-emitting diode) flashlight. Its red is purer and deeper,  so the division between rod and cone vision is more sharply drawn. LEDs  also use much less current, so the batteries last for years. Many LED  flashlights for astronomers are now available.
    Secrets of Deep-Sky Observing by Alan MacRobert 
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

          
    
        

          
    
        

    Monday, 16 August 2010
    

          
    
        

    

    




    
Dark adaption 1

    

    

    

    

    

    Be prepared to let your eyes adjust to the darkness. It takes about half an hour for the human eye to become totally darkadapted. If you look into headlights, or a bright flashlight, even for a second, be ready to start that half hour over again.

    

    Stargazing Basics
    
Getting Started in Recreational Astronomy
    
ISBN-13 978-0-521-72859-1
    
- PAUL E. KINZER
    

    

    

    

    

Posted by



at


















    


    

    

    



    

    



    

    

    

    

        
    
      

    


    

    

    
Subscribe to:
Posts (Atom)