Deep Sky Object in Autumn
NGC784 (Galaxy in Triangulum)


Date & Time: Dec 8 2018, from 20:49 to 21:35 JST(+0900)
Composed 10 shots with 5 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 & Pictor 201XT
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


NGC784 / Galaxy, type SBdm: sp
R.A.02h 01m 17.0s (2000.0)
Dec.+28°50' 15" (2000.0)
Apparent Size7.3×1.5'
Radial Velocity+221 km/s
Magnitude12.2
Distance20 million light yrs.
Group of GalaxiesNGC672 Group
Other IDsUGC 1501, CGCG 503-74
MCG +5-5-45, IRAS 1584+2836
PGC 7671
In southern part of Triangulum, a medium-sized galaxy of NGC784 can be found at about 2 degrees southeast from alpha Tri. The galaxy has been classified in an unclear spiral, has a long axis of about 7 arc minutes and a brightness of 12th magnitude. NGC784 is a member of small-scaled group with NGC672 positioned at 3 degrees southwest; a distance has been estimated as 20 million light years.



NGC772
NGC864

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