Deep Sky Object in Autumn
Arp 166 (Galaxies in Triangulum)


Date & Time: Jan 9 2020, from 21:01 to 22:07 JST(+0900)
Composed 12 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight


Arp 166 (NGC750) / Galaxy, type E pec
R.A.01h 57m 32.7s (2000.0)
Dec.+33°12' 32" (2000.0)
Apparent Size1.5×1.2'
Radial Velocity+5222km/s
Magnitude12.9
Distance225 million light yrs.
Grouop of Galaxies -
Other IDsUGC 1430, MCG +5-5-34
PGC 7369
This image shows you a minor interacting galaxy pair bathed in central region of Triangulum. A northern galaxy is NGC750 and southern one is NGC751, these galaxies have been apart only 1 arc minute. Both galaxies have sizes of a bit smaller than 2 arc minutes and brightness of 13th magnitude. You can detect a dimmed tail-like structure has been stretched in northern direction in NGC750.



Arp 113
Arp 295

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