Search found 557 matches

by hhzhang
Wed Dec 01, 2021 10:36 pm
Forum: Astrophotography
Topic: My first DSO photography attempt
Replies: 5
Views: 321

Re: My first DSO photography attempt

1200 frames! You must have a super-computer for processing.

What was the camera in use? I guess it is still Fuji's sensor that has much better sensitivity to H-alpha than others.
by hhzhang
Wed Dec 01, 2021 10:39 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 382
Views: 30222

Re: My astrophotography 2021

While it looked to continue with clear skies, I went up to the Pasir Ris Park to shoot M45. Wanted to see if 135mmF2 wide open + ASI183MM Pro could bring out in the nebulosity. The lens did not disappoint even with the 2.4um tiny pixels. I didnot get 2hrs worth of data because the clouds creeped in ...
by hhzhang
Wed Dec 01, 2021 10:20 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 382
Views: 30222

Re: My astrophotography 2021

2021-Nov-30 to Dec-1 night Finally, a largely-clear night came upon us in Singapore. After sunset, I took an image of Pluto and combined it with another shot from a Nov 22 session. The apparent motion of this large dwarf planet at ~35AU distance is clearly visible. https://lh3.googleusercontent.com/...
by hhzhang
Sat Nov 27, 2021 11:32 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 382
Views: 30222

Re: My astrophotography 2021

2021-11-27 C/2021 A1 is truly becoming the most prominent comet of 2021. It had been quite elusive behind the clouds in pre-dawn skies of Singapore. But this morning there was a moment of gap and I took advantage of it. Despite my mistakes (forgot to take flat frames, etc.), the comet image came out...
by hhzhang
Tue Nov 23, 2021 1:33 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 382
Views: 30222

Re: My astrophotography 2021

Still fascinated with solar system objects. 2021-Nov-22 Thanks for the clear night! Neptune and Triton, at 29AU distance from earth. https://lh3.googleusercontent.com/pw/AM-JKLWlhJ3AlxNkVC4vumGOBExTYaBRpqK4398TExXVvN0pHvKKz4gZqlvKvRiQWGhECTe6JA8AsiIlxn2l59ALtoxF-0lyiqar_8rBEOBQFNjaDehFpD_Vnuhx4iC9vS...
by hhzhang
Mon Nov 22, 2021 1:43 pm
Forum: Buy and Sell
Topic: WTS: iOptron SmartEQ Pro+ (Sold)
Replies: 1
Views: 237

Re: WTS: iOptron SmartEQ Pro+ (Sold)

Sold to a very nice guy.
by hhzhang
Sun Nov 21, 2021 1:49 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 382
Views: 30222

Re: My astrophotography 2021

2021-Nov-20 Full moon night of clear skies after dusk. Went to shoot two asteroids of interest. A. (279) Thule Archetype for the Thule dynamical group: they orbit in the outermost edge of the asteroid belt in a 4:3 orbital resonance with Jupiter. This stacked image shows its slight move over 1-hour ...
by hhzhang
Sat Nov 20, 2021 8:26 pm
Forum: Buy and Sell
Topic: WTS: iOptron SmartEQ Pro+ (Sold)
Replies: 1
Views: 237

WTS: iOptron SmartEQ Pro+ (Sold)

1yr old mount. Fully functional. For example, my recent M31 shot was taken on the mount, with a 70mm APO+ASI2600+autoguider -- probably 3.5Kg. Earlier this year it underwent self-helped maintenance after the control-board/motor breakdown. So it is now with a new control board and a new motor unit --...
by hhzhang
Fri Nov 19, 2021 8:03 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 382
Views: 30222

Re: My astrophotography 2021

2021-11-18 But Venus never disappoints. It travels into the southern Dipper asterism in Sagittarius. I just received the digital edition of 2022-Jan issue of Sky&Tel which has a special article on Venus. I learned from it that the Venus's apparent trajectory has a 8-year cycle. So I look forward...
by hhzhang
Fri Nov 19, 2021 7:56 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 382
Views: 30222

Re: My astrophotography 2021

2021-Nov-18~19 One of the brightest close-approaches of an NEO this year. This early morning it was still approaching the 0.3856AU minimum distance (2021-Nov-21 19:20 UTC). Two nights ago, it was at similar brightness and in the pre-dawn hours I tried to capture it with my small APO (70mmF4.8+ASI183...