Astronomy:NGC 68 group

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Short description: Galaxy group in the constellation Andromeda
VV 166
N70s-crop.jpg
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
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

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

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 67  00h 18m 12.18s 30° 03′ 17.5″ 0.020734[1] 40,000 275[3]
NGC 67a  00h 18m 14.83s 30° 03′ 45″ 0.022162 35,000 300
NGC 68  00h 18m 18.48s 30° 04′ 15.4″ 0.01913 90,000 260
NGC 69  00h 18m 20.5s 30° 02′ 21.2″ 0.022285 80,000 300
NGC 70  00h 18m 22.6s 30° 04′ 44″ 0.023907 180,000 320
NGC 71  00h 18m 23.6s 30° 03′ 45″ 0.022339 130,000 300
NGC 72  00h 18m 28.36s 30° 02′ 23.7″ 0.024213 120,000 325
NGC 72a  00h 18m 34.35s 30° 02′ 08″ 0.022399 25,000 300
NGC 74  00h 18m 49.39s 30° 03′ 39.1″ 0.023646 65,000 315
GALEXASC J001817.48+295854.3  00h 18m 17s 29° 58′ 50″ 0.024981 30,000[4] 335
PGC 1183  00h 18m 14.05s 29° 57′ 05″ 0.020374 70,000 275
PGC 1163  00h 17m 46.02s 30° 09′ 4.5″ 0.021885 75,000 295
2MASX J00174636+2957409  00h 17m 46.3s 29° 57′ 39″ 0.024113 60,000 325
2MASX J00183652+2955586  00h 18m 36.5s 29° 55′ 55.2″ 0.021475 30,000 290
2MASX J00181971+2954372  00h 18m 19.67s 29° 54′ 35″ 0.022192 50,000 300
2MASX J00181589+2954145  00h 18m 15.92s 29° 54′ 12.5″ 0.024093 45,000 325
2MASX J00191196+3000506  00h 18m 11.97s 30° 00′ 47.8″ 0.023456 45,000 315
2MASX J00191966+3005286  00h 19m 19.64s 30° 05′ 26″ 0.02389 60,000 320
2MASX J00183355+2950272  00h 18m 31.52s 29° 50′ 24.3″ 0.020981 30,000 285
2MASX J00174173+2951151  00h 17m 41.71s 29° 51′ 12.4″ 0.022359 35,000 300
PGC 1138  00h 17m 17.38s 30° 12′ 30.5″ 0.020988 55,000 285
PGC 1119  00h 17m 02.63s 29° 56′ 29.7″ 0.023116 80,000 310
NGC 76  00h 19m 37.81s 29° 55′ 59.3″ 0.02444 120,000 330
AGC 102761  00h 19m 43.83s 30° 03′ 25.5″ 0.023590 10,000 320
2MASX J00164915+3010462  00h 16m 49.16s 30° 10′ 43.5″ 0.024133 40,000 325
PGC 1266  00h 19m 43.06s 29° 56′ 4.1″ 0.022339 45,000 300
2MASX J00181849+2942002  00h 18m 18.47s 29° 41′ 57.7″ 0.022749 45,000 305
2MASX J00194032+2949286  00h 19m 40.35s 29° 49′ 26.1″ 0.025621 50,000 345
PGC 1090  00h 16m 32.85s 30° 20′ 42.5″ 0.021331 85,000 290
PGC 1220  00h 18m 55.28s 30° 30′ 46.6″ 0.02408 50,000 325
2MASX J00160018+3002561  00h 16m 00.31s 30° 02′ 54.9″ 0.022676 45,000 305
AGC 100116  00h 15m 55.55s 30° 04′ 25.2″ 0.022379 35,000 305
PGC 1084  00h 16m 24.93s 30° 22′ 25.5″ 0.021148 55,000 290
2MASX J00203207+3003013  00h 20m 32.06s 30° 02′ 58.8″ 0.021058 35,000 285

References

  1. ↑ 1.0 1.1 1.2 "objects within 30 arcminutes of NGC 72a". NED. NASA/IPAC. http://ned.ipac.caltech.edu/cgi-bin/objsearch?in_csys=Equatorial&in_equinox=J2000.0&lon=00+18+15&lat=30+04+00&radius=30.0&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&search_type=Near+Position+Search&z_constraint=Unconstrained&z_value1=&z_value2=&z_unit=z&ot_include=ANY&nmp_op=ANY&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=Distance+to+search+center&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES. 
  2. ↑ Seligman, Courtney. "New General Catalog Objects: NGC 50 - NGC 99". Cseligman.com. http://cseligman.com/text/atlas/ngc0a.htm#68. 
  3. ↑ Wright, Ned. "Ned Wright's Javascript Cosmology Calculator". astro.ucla.edu. UCLA. http://www.astro.ucla.edu/~wright/CosmoCalc.html. 
  4. ↑ "Angular Size Calculator". www.1728.org. http://www.1728.org/angsize.htm. 



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