Celestial Subaru (Steve Lantz)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: 16 Tau · 17 Tau · 19 q Tau · 20 Tau · 21 Tau · 22 Tau · 23 Tau · 24 Tau · 25 eta Tau · 26 Tau · 27 Tau · 28 Tau · Alcyone · Asterope · Atlas · Celaeno · Electra · IC 349 · M 45 · Maia · Maia nebula · Merope · Merope nebula · NGC 1432 · NGC 1435 · Pleiades · Pleione · Sterope II · Taygeta · The star Atlas (27Tau) · And 7 more.

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Celestial Subaru

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Celestial Subaru

The skies to the east are fairly dark from my new location, so I imaged the Pleiades with no filters. The ambient temperature was 5.6 degrees C and since I was using 30s exposures I elected to go without cooling. This was my first attempt with a William Optics focal reducer/flat field accessory. Unfortunately I didn't catch that the spacing wasn't dialed in properly, so I got quite a bit of aberration at the corners of the field and had to crop out as much of this as possible. Nonetheless, I was able to record a great deal of the reflection nebulosity.

Relevant data:

exposures = 250 x 30 s = 2.1 hr integration

chip temp = 5.6 degrees C

no filters

10 dark frames

autoguider employed

EFL = approx 570 mm at f/5.5

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Status	Advanced success
Started	...
Astrometry.net job	3077796
PixInsight job	WWU6AA1X082630VCCUUBADC983196ONW
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h47m20s.52
RA (top/left)	03h43m51s.69
RA (top/right)	03h45m47s.15
RA (bottom/right)	03h50m48s.30
RA (bottom/left)	03h48m54s.92

Dec (center)	+24°05′32″.2
Dec (top/left)	+24°28′28″.5
Dec (top/right)	+23°17′11″.10
Dec (bottom/right)	+23°42′14″.0
Dec (bottom/left)	+24°53′53″.7

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Celestial Subaru

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