Deep Sky Object in Autumn
HCG7 (Galaxy Group in Cetus)


Date & Time: Nov 21 2025, from 22:27 to 23:21 JST(+0900)
Composed 10 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with IDAS LPS-P1 Light-pollution suppression 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


NGCHicksonR.A.Dec.SizeMagnitude
1927a00h 39m 13.4s+00°51' 51"2.2×0.8'13.4
1967b00h 39m 17.8s+00°54' 46"1.2×0.9'13.8
2017c00h 39m 34.9s+00°51' 35"2.2×1.4'13.6
1977d00h 39m 18.8s+00°53' 31"0.9×0.8'14.8
This image captures Hickson Compact Group 7 (HCG 7), a dense galaxy group located near the border with Pisces, about 11 degrees northeast of ι Ceti at the westernmost edge of Cetus. Within a region just over 5 arcminutes across, the group contains four tiny galaxies and is estimated to lie at a distance of about 200 million light-years from the Milky Way. The most prominent members are NGC 192 (HCG 7A) and NGC 201 (HCG 7C), both barred spiral galaxies with apparent sizes of a little over 2 arcminutes and magnitudes between 12 and 13.
Numbers with 3 digits represent NGC #



Abell 2666
HCG10

Copyright(c) 2025 by Naoyuki Kurita, All rights reserved.
To top page To Deepsky in Autumn index Cetus