M58 in Virgo (Greg Nelson)

Celestial hemisphere: Northern · Constellation: Virgo (Vir) · Contains: M 58 · NGC 4579

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M58 in Virgo

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M58 in Virgo

Well, this image was a real pill. It started with a fail on my part to get a guide star on the sensor at the rotation angle I selected. It seems there are a few rotator settings where the predicted star position doesn't fall on the chip. I think this means my rotator is slightly off center and getting it exactly on center is a real challenge. Anyway, I only had a couple of nights before travel and didn't have time to select a new guide star so I just went with unguided subs. Yield wasn't great, but I got usable data. Then, I found that there are very few stars that are in this frame for spectrophotometric color calibration and I just could not get acceptable true color white balance from any calibration I tried. So I just went with it because there are some nice resolved details. Anyway, it was a lesson demonstrating when things are not 100% right, you can still have some processing fun with an image.

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Status	Advanced success
Started	...
Astrometry.net job	7824931
PixInsight job	8H4BFKWQ7XBFP5FZBSOJG59SZ5UZOX32
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h37m43s.537
RA (top/left)	12h37m59s.999
RA (top/right)	12h36m30s.507
RA (bottom/right)	12h37m26s.883
RA (bottom/left)	12h38m56s.632

Dec (center)	+11°49′09″.41
Dec (top/left)	+12°07′38″.58
Dec (top/right)	+11°42′58″.70
Dec (bottom/right)	+11°30′43″.31
Dec (bottom/left)	+11°55′19″.15

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M58 in Virgo

M58 in Virgo

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M58 in Virgo

M58 in Virgo

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