What does make RGB white here?
Frames:
• red channel is Hα filtered with Chroma 3nm, integrated across 10.0 hours
• blue channel is OIII filtered with Chroma 3nm, integrated across 10.0 hours
So what is white?
Search found 1078 matches
- Sat Oct 17, 2020 9:25 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Cygnus: Bubble and Crescent (2020 Oct 17)
- Replies: 19
- Views: 6428
- Sat Oct 17, 2020 4:54 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Planetary Nebula Abell 78 (2020 Oct 16)
- Replies: 11
- Views: 4162
Re: APOD: Planetary Nebula Abell 78 (2020 Oct 16)
I am trying to read this now: "Spectral type: M0 D ~ " It's red (=M, the last and the most red in the series of Oh Be A Fine Girl Kiss Me). It's not as red as they come (M0 ≈ K9, or photospheric temperature of 3700°K). It's prone to flares (~) "Parallaxes (mas): 2.1622 [0.0359]" ...
- Fri Oct 16, 2020 10:31 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Planetary Nebula Abell 78 (2020 Oct 16)
- Replies: 11
- Views: 4162
Re: APOD: Planetary Nebula Abell 78 (2020 Oct 16)
3) What's the orange spike/colored star towards bottom left corner ?