by Ann » Sat Mar 25, 2023 6:00 am
Chris Peterson wrote: ↑Fri Mar 24, 2023 9:10 pm
Ann wrote: ↑Fri Mar 24, 2023 8:34 pm
There are some nice dust clouds in this image. The color of the comet's dust tail is exactly the same as the other dust bunnies in the image. (Just maybe it is a tad more yellowish, i.e., it is slightly beige rather than an "absolutely non-red shade of gray".) The comet's coma still glows green.
Can anyone identify the reasonably bright bluish stars at 3 o'clock and sort of 9.30?
Ann
Here you go...
_
C2022E3_230321_Annotated.jpg
Thanks, Chris, that's pretty amazing!
You know the brightest star in the picture, the slightly bluish one at sort of "9.30 o'clock"? The one with the designation TYC 4748-1630-1? According to
Simbad, that's a star of spectral class G2IV, and what's worse, they show a photo of an
orange-colored star to illustrate it! I almost fell off my chair when I saw it!! I guess it's the bluish refection nebulosity surrounding the star that makes it look blue.
And you know that nice galaxy you identified for me? NGC 1665, with its gorgeous "galaxy shape"? Do you know it looks exactly the same in a "closeup" from SDSS, with no more details revealed?
I guess NGC 1665 used to look like NGC 1512 before it lost all its surrounding fluff, don't you think so?
Ann
[quote="Chris Peterson" post_id=329997 time=1679692223 user_id=117706]
[quote=Ann post_id=329995 time=1679690083 user_id=129702]
There are some nice dust clouds in this image. The color of the comet's dust tail is exactly the same as the other dust bunnies in the image. (Just maybe it is a tad more yellowish, i.e., it is slightly beige rather than an "absolutely non-red shade of gray".) The comet's coma still glows green.
Can anyone identify the reasonably bright bluish stars at 3 o'clock and sort of 9.30?
Ann
[/quote]
Here you go...
_
C2022E3_230321_Annotated.jpg
[/quote]
Thanks, Chris, that's pretty amazing! :D
You know the brightest star in the picture, the slightly bluish one at sort of "9.30 o'clock"? The one with the designation TYC 4748-1630-1? According to [url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TYC+4748-1630-1&submit=SIMBAD+search]Simbad[/url], that's a star of spectral class G2IV, and what's worse, they show a photo of an [i][b][color=#FF8000]orange[/color][/b][/i]-colored star to illustrate it! I almost fell off my chair when I saw it!! I guess it's the bluish refection nebulosity surrounding the star that makes it look blue.
And you know that nice galaxy you identified for me? NGC 1665, with its gorgeous "galaxy shape"? Do you know it looks exactly the same in a "closeup" from SDSS, with no more details revealed?
[float=left][attachment=0]APOD 24 March 2023 identification detail.png[/attachment][/float][float=right][img3="NGC 1665. Credit: SDSS."]https://upload.wikimedia.org/wikipedia/commons/d/d6/NGC1665_-_SDSS_DR14.jpg[/img3][/float]
[clear][/clear]
I guess NGC 1665 used to look like NGC 1512 before it lost all its surrounding fluff, don't you think so?
[img3="NGC 1512 (left). Image credit: Victor M. Blanc 4-metre telescope at Cerro Tololo Inter-American Observatory."]https://images.news18.com/ibnlive/uploads/2022/05/stars.png[/img3]
Ann