Deep Sky Object in Spring
UGCA320 (Galaxy in Virgo)



Date & Time: Apr 25 2025, from 23:26 to 24:20 JST(+0900)
Composed 10 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



UGCA320 / Galaxy, type IB(s)m sp
R.A.13h 03m 15.6s (2000.0)
Dec.-17°25' 13" (2000.0)
Apparent Size7.1×0.8'
Radial Velocity+744km/s
Magnitude13.5
Distance30 million light yrs.
Group of Galaxies -
Other IDsMCG -3-33-30, DDO 161
PGC 45084
UGCA 320 is a faint irregular galaxy located in the southernmost part of the constellation Virgo. To find it, it is best to trace about 8 degrees east of δCrv, which forms the northeastern side of the quadrilateral of the constellation Corvus.
With a major axis of 7 arcminutes, it is relatively large among the galaxies scattered in this area. However, its brightness of 13th magnitude makes it challenging to observe visually. It is an edge-on irregular galaxy without a clear spiral structure and is believed to be interacting with the small irregular galaxy UGCA 319, located approximately 18 arcminutes to the northwest. The distance estimated from its redshift is around 30 million light-years.




UGCA205 (Sextans A)

ESO510-13


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