AT6RC first light - M45 - Pleiades - 1h44m (pfile)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: 19 Tau) · 25 Tau) · Barnard's Merope Nebula · HD23302 · HD23325 · HD23326 · HD23338 · HD23361 · HD23375 · HD23387 · HD23408 · HD23409 · HD23432 · HD23441 · HD23479 · HD23480 · HD23489 · HD23511 · HD23512 · HD23568 · HD23584 · HD23585 · HD23607 · HD23609 · HD23628 · HD23629 · HD23630 · HD23631 · HD23632 · HD23642 · And 21 more.

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AT6RC first light - M45 - Pleiades - 1h44m

Powered byPixInsight

AT6RC first light - M45 - Pleiades - 1h44m

lots of problems with this image, but i kind of made it presentable

26x4min (1h44m) @ ISO1600

20 flats

80 darks

80 bias

calibrated in pixinsight 1.7

processed in pixinsight 1.7

captured with BackyardEOS

guiding: Meade DSI + orion 9x50 finder and PhD, dithered

Astronomy Technology AT6RC

Tele-Vue TRF-2008 0.8x Flattener/reducer - f/7.2

Canon 50d (hap griffin Astrodon L mod)

Astronomik CLS filter

notes:

subs are too long and killed the star colors. maybe i'll try ISO800 next time.

framing is ridiculous but i was racing against clouds and already had the flats for this position angle.

bad, bad halos around the stars. in the red channel these halos were strong enough to cause the stars to have grey halos around them in the RGB view. fixed up with some creative range masks and pixelmath. not sure if anything other than shorter subexposures would solve this problem. HDR merge of shorter exposures may not help as the halos themselves are not actually overexposed...

Cloudy Nights

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Status	Advanced success
Started	...
Astrometry.net job	6573988
PixInsight job	BNHWW6MSY4H13Y3OH2JDWPSM2EBNSS8Q
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	03h46m21s.381
RA (top/left)	03h48m15s.569
RA (top/right)	03h45m03s.149
RA (bottom/right)	03h44m28s.223
RA (bottom/left)	03h47m38s.916

Dec (center)	+24°08′07″.30
Dec (top/left)	+24°39′01″.84
Dec (top/right)	+24°44′21″.23
Dec (bottom/right)	+23°37′05″.29
Dec (bottom/left)	+23°31′49″.25

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AT6RC first light - M45 - Pleiades - 1h44m

AT6RC first light - M45 - Pleiades - 1h44m

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AT6RC first light - M45 - Pleiades - 1h44m

AT6RC first light - M45 - Pleiades - 1h44m

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