Search found 343 matches

by hhzhang
Thu May 13, 2021 12:32 pm
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 151
Views: 8308

Re: My astrophotography 2021

The giant planets. Again, Jupiter is crossing Aquarius, while Saturn still in Cap, and Neptune in Psc. If all goes well, I will be able to track Saturn completing another full circle in the celestial. But no human being has ever been able to track a full circle of Neptune's motion (164.8yr) in his/h...
by hhzhang
Thu May 13, 2021 12:25 pm
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 151
Views: 8308

Re: My astrophotography 2021

2021-5-13 No luck for clear evening skies. Wish for chances of viewing the inner planets dominating the western skies at dusk. But here comes an uncommon object for the early morning. The unusually bright nova in Cassiopeia, the Nova Cas 2021. It's light curve is special and in the last few days it ...
by hhzhang
Thu May 13, 2021 11:01 am
Forum: Astrophotography
Topic: M8 Lagoon Nebula and surroundings
Replies: 2
Views: 15

Re: M8 Lagoon Nebula and surroundings

Cannot see the picture.
by hhzhang
Mon May 10, 2021 9:27 pm
Forum: Astrophotography
Topic: My Update
Replies: 3
Views: 67

Re: My Update

Decent quality deep-sky pictures despite pretty short integration times. Well done!
by hhzhang
Mon May 10, 2021 11:46 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 151
Views: 8308

Re: My astrophotography 2021

Now the question is this: when do you think Eunomia will catch up with Hygiea (same RA)? Don't use any tools. Just guess!
by hhzhang
Mon May 10, 2021 11:33 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 151
Views: 8308

Re: My astrophotography 2021

2021-5-3 to 5-9 Tracking two large asteroids in apparently co-motion across the M44 field. Turns out a good chance to examine Keppler's third law, just approximately. Given the semi-major axis is 2.643 for Eunomia and Pi for Hygiea, the ratio between the orbital periods is 1.296. Measuring the two l...
by hhzhang
Mon May 10, 2021 11:21 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 151
Views: 8308

Re: My astrophotography 2021

Dragon Man wrote: Sun May 09, 2021 6:07 pm Absolutely beautiful images [smilie=admire.gif]

Well done Image
Thank you for the nice words!

This is my favorite hobby. No matter how many disadvantages here in Singapore.
by hhzhang
Sun May 09, 2021 11:41 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 151
Views: 8308

Re: My astrophotography 2021

Sun rises in full power.

Image
by hhzhang
Sun May 09, 2021 11:39 am
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 151
Views: 8308

Re: My astrophotography 2021

2021-5-9

Cresent moon just passed the mag6.5 star 35 Cet.

Image
by hhzhang
Fri May 07, 2021 10:53 pm
Forum: Astrophotography
Topic: My astrophotography 2021
Replies: 151
Views: 8308

Re: My astrophotography 2021

2021-5-7 A wait too long for a glimpse of Mercury's return to the western night sky Bad weathers since Mercury had returned to the western dusk/night sky. Today it finally showed up through the gaps of clouds. https://lh3.googleusercontent.com/pw/ACtC-3eDVPVtpeNz05cCdYhucIEF-8tXenC13dHhQfarrFzugHDsw...