NGC 1023 Group

NGC 1023 Group
Observation data (Epoch )
Brightest member	NGC 1023
Number of galaxies	~23 plus 42 candidate members[1][2]
Distance	20.6 Mly (6.3 Mpc)

The NGC 1023 Group is a group of galaxies about 20.6 million light-years (6.3 Mpc) away from Earth. It is a group in the Local Supercluster, along with the Local Group.^[3]

Members

Members of the group

Name	Type	Magnitude
NGC 1023	SB(rs)0	10.65
NGC 925	SAB(s)d	10.96
NGC 959	Sdm:	12.38
NGC 891	SA(s)b	11.24
NGC 1239	SAB(rs)cd	12.14
NGC 1058	SA(rs)c	12.26
NGC 1003	SAcd	12.1
NGC 949	SA(rs)b?	11.8
NGC 959	Sdm?	12.4
IC 239	SAB(rs)cd	11.1
UGC 2034	Im	13.1
UGC 2023	Im?	13.0
UGC 2165	dE,N	13.7
UGC 2126	SABdm?	13.98
UGC 2157	Sdm?	13.99
NGC 1023A	IB?	12.7
UGC 2014	Im?	14.5
UGC 1865	Sm?	14.42
NGC 1023C	dE/I	16.31
NGC 1023B	dI	16.35
NGC 1023D	dE/I	16.51
GALEXASC J024016.48+373731.1	dE,N	16.66
NGC 1023 GROUP:[TT2009] 42	dE	19.25

• Probable (dwarfs): DDO 024, DDO 025.
• Possible members: NGC 672, IC 1727, NGC 1156(?).
• Possible (dwarfs): DDO 011, DDO 017, DDO 019, DDO 022, DDO 026.

Map

The location of the NGC 1023 group within the Virgo Supercluster (as part of the Laniakea Supercluster) can be found near the center of this diagram - below the blue "Local Group" mark.

References

1. Trentham, Neil; Tully, R. Brent (2009). "Dwarf galaxies in the NGC 1023 Group". Monthly Notices of the Royal Astronomical Society. 392 (2): 722–734. arXiv:0906.2540. Bibcode:2009MNRAS.398..722T. doi:10.1111/j.1365-2966.2009.15189.x. S2CID 18442520.
2. "NGC 1023 Group". Astronomy Sketch of the Day. March 2014. Retrieved 2020-09-11.
3. "The Universe within 100 million Light Years - the Virgo Supercluster". Atlas of the Universe.