NGC 68 group

VV 166, sometimes also called the NGC 70 galaxy group or Arp 113, is a cluster of galaxies in Andromeda. The main group was discovered in 1784 by William Herschel, who listed the galaxies as a single object. Later, in the 1880s, John Louis Emil Dreyer managed to discern some of the galaxies in this region and cataloged them.[2] The prominent elliptical galaxy in the region, NGC 68, is probably not a member of the group.

The galaxy group with labels
VV 166
Observation data (Epoch )
Constellation(s)Andromeda
Right ascensionmain group 00h 18m 30s cluster center 00h 18m 45s
Declinationmain group 30° 03′ 00″ cluster center 30° 00′ 00″
Number of galaxies40 (confirmed)
60+ (possible)[1]
Richness classGroup 0/1
Bautz–Morgan classificationtype II/III
Velocity dispersion~6750[1]
Redshift0.019 to 0.025
Distance
(co-moving)		~300 mly
Other designations
[M98j] 003, VV 166, RSCG 01, WBL 007, USCG U012, RASSCALS SRGb 062, PCC S34-115, HOLM 006, SRGb 062, DOC SRGb 062, WP 01, PPS2 060, HDCE 0011

Superimposed on the group is a smaller cluster around 220 mly away, which includes AGC 102760, UGC 152, and UGC 166.

Members
galaxy RA DEC redshift size (ly) distance (mly)
NGC 6700h 18m 12.18s30° 03′ 17.5″0.020734[1]40,000275[3]
NGC 67a00h 18m 14.83s30° 03′ 45″0.02216235,000300
NGC 6800h 18m 18.48s30° 04′ 15.4″0.0191390,000260
NGC 6900h 18m 20.5s30° 02′ 21.2″0.02228580,000300
NGC 7000h 18m 22.6s30° 04′ 44″0.023907180,000320
NGC 7100h 18m 23.6s30° 03′ 45″0.022339130,000300
NGC 7200h 18m 28.36s30° 02′ 23.7″0.024213120,000325
NGC 72a00h 18m 34.35s30° 02′ 08″0.02239925,000300
NGC 7400h 18m 49.39s30° 03′ 39.1″0.02364665,000315
GALEXASC J001817.48+295854.300h 18m 17s29° 58′ 50″0.02498130,000[4]335
PGC 118300h 18m 14.05s29° 57′ 05″0.02037470,000275
PGC 116300h 17m 46.02s30° 09′ 4.5″0.02188575,000295
2MASX J00174636+295740900h 17m 46.3s29° 57′ 39″0.02411360,000325
2MASX J00183652+295558600h 18m 36.5s29° 55′ 55.2″0.02147530,000290
2MASX J00181971+295437200h 18m 19.67s29° 54′ 35″0.02219250,000300
2MASX J00181589+295414500h 18m 15.92s29° 54′ 12.5″0.02409345,000325
2MASX J00191196+300050600h 18m 11.97s30° 00′ 47.8″0.02345645,000315
2MASX J00191966+300528600h 19m 19.64s30° 05′ 26″0.0238960,000320
2MASX J00183355+295027200h 18m 31.52s29° 50′ 24.3″0.02098130,000285
2MASX J00174173+295115100h 17m 41.71s29° 51′ 12.4″0.02235935,000300
PGC 113800h 17m 17.38s30° 12′ 30.5″0.02098855,000285
PGC 111900h 17m 02.63s29° 56′ 29.7″0.02311680,000310
NGC 7600h 19m 37.81s29° 55′ 59.3″0.02444120,000330
AGC 10276100h 19m 43.83s30° 03′ 25.5″0.02359010,000320
2MASX J00164915+301046200h 16m 49.16s30° 10′ 43.5″0.02413340,000325
PGC 126600h 19m 43.06s29° 56′ 4.1″0.02233945,000300
2MASX J00181849+294200200h 18m 18.47s29° 41′ 57.7″0.02274945,000305
2MASX J00194032+294928600h 19m 40.35s29° 49′ 26.1″0.02562150,000345
PGC 109000h 16m 32.85s30° 20′ 42.5″0.02133185,000290
PGC 122000h 18m 55.28s30° 30′ 46.6″0.0240850,000325
2MASX J00160018+300256100h 16m 00.31s30° 02′ 54.9″0.02267645,000305
AGC 10011600h 15m 55.55s30° 04′ 25.2″0.02237935,000305
PGC 108400h 16m 24.93s30° 22′ 25.5″0.02114855,000290
2MASX J00203207+300301300h 20m 32.06s30° 02′ 58.8″0.02105835,000285

    References
    1. "objects within 30 arcminutes of NGC 72a". NED. NASA/IPAC. Retrieved 18 May 2014.
    2. Seligman, Courtney. "New General Catalog Objects: NGC 50 - NGC 99". Cseligman.com. Retrieved 18 May 2014.
    3. Wright, Ned. "Ned Wright's Javascript Cosmology Calculator". astro.ucla.edu. UCLA. Retrieved 18 May 2014.
    4. "Angular Size Calculator". www.1728.org. Retrieved 18 May 2014.
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