California Nebula in HaRGB, plus a tiny visitor (Ken Sablinsky)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 13.41 · 46 ksi Per · 760 Massinga · California Nebula · IC 2005 · IC 2027 · LBN 752 · LBN 756 · LDN 1456 · LDN 1462 · LDN 1463 · LDN 1464 · LDN 1469 · Menkib · NGC 1499 · Sh2-220 · The star ξPer

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California Nebula in HaRGB, plus a tiny visitor

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California Nebula in HaRGB, plus a tiny visitor

The California Nebula with Ha for the luminance, and short 90 second images for the RGB. I don't think I need to shoot as long as I do in Ha, but it's nice to see such a smooth low noise individual sub frames, and it cuts down both on time dithering as well as hard drive space!

After plate solving it, I noticed it highlighted 760 Massinga - an asteroid that I had no idea was in the frame at the time of the images. Since it was taken over three nights, the asteroid mostly got rejected out of the frames (at least in Ha), but going back and blinking the images, it is clearly visible in all frames, slowly moving at 10 arc-minutes per day. If you click on the full resolution link, it's very close to where Astrobin plate solved it, showing up in the red channel as a red dot. And then to the left and a bit lower, it's in the blue channel from the next night.

Original
Final
B

B

Description: The blue halos around some of the bright stars were bugging me, so I worked on doing a better RGB star overlay. Used StarXTerminator instead of StarNet, plus a better PixelMath blending formula. Tweaked the Luminance contrast a touch as well.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Advanced success
Started	...
Astrometry.net job	5410769
PixInsight job	WMI0H991X09EDKFXZHGKZ4EGB2BM910L
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h01m36s.84
RA (top/left)	03h52m25s.60
RA (top/right)	04h11m07s.83
RA (bottom/right)	04h11m08s.23
RA (bottom/left)	03h51m46s.98

Dec (center)	+36°15′46″.3
Dec (top/left)	+34°54′38″.6
Dec (top/right)	+35°00′19″.3
Dec (bottom/right)	+37°33′57″.5
Dec (bottom/left)	+37°28′26″.8

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California Nebula in HaRGB, plus a tiny visitor

California Nebula in HaRGB, plus a tiny visitor

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California Nebula in HaRGB, plus a tiny visitor

California Nebula in HaRGB, plus a tiny visitor

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