Deep Sky Object in Autumn
Abell 400 (Galaxy cluster in Cetus)


Date & Time: Dec 28 2019, from 21:24 to 22:09 JST(+0900)
Composed 12 shots with 4 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


Abell 400 / Galaxy cluster, type 1 1 II-III
R.A.02h 57m 36.0 (2000.0)
Dec.+06°01' 00" (2000.0)
Apparent Size56.0'
# of Galaxies58
Red Shift0.0232
Magnitude13.9
Distance320 million light yrs.
Supergalactic cluster -
Abell 400 is a small-scaled galaxy cluster positioned about 2 degrees NNW of alpha-Cet (Menkar) which forms the head of Cetus. Although the cluster has a comparatively larger span of over 50 arc minutes, either members are indistinct. A brightest on in center CGCG415-41 has at most 13.8th magnitude. Less than 60 members are scatted sparsely; the distance has been estimated as approximately 320 million light years.



Abell 397
Perseus I Cluster (Abell 426)

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