Shakhbazian 1, Russian Cluster, SAHB
Cluster of Galaxies Shakhbazian 1,
in Ursa Major
"Russian Cluster", SAHB
Discovered by Ambartzumian in 1957.
- 10 : 54.8 (h:m)
- +40 : 28 (d:m)
- Distance from Sun:
- 1.3 billion ly
- Distance from Galactic Center:
- 1.3 billion ly
- Apparent Diameter:
- Radial Velocity:
- +29,700 km/s
- Abs. Mag:
R.K. Shakhbazian (1957) reported the
discovery of a globular cluster candidate in Ursa Major (i.e., a cluster
of red objects) on POSS plates by Ambartzumian. Shakhbazian published a
distance of about 130 kpc (420,000 light years) which would have
positioned it in the outlayers of the Galactic Halo, at the same distance
as Palomar 3 and further than several Milky Way
satellite dwarf galaxies. It was included in the lists of
Sawyer Hogg (1958) and
Sawyer Hogg (1959).
Ruprecht et.al. (1983) list it as GCL 16.
Hesser and Shawl (1985) included it in their
survey of globulars.
But Robinson and Wampler (1973) had already
identified it as a compact group of 17 major galaxies removing from us
at 29,700 km/s or almost one tenth of light velocity; this corresponds
to a distance of 390 Mpc or about 1.3 billion light years, assuming
- J.E. Hesser and S.J. Shawl, 1985.
Integrated spectral types from image-tube spectra for 90 Galactic
Publications of the Astronomical Society of the Pacific, Vol. 97, No. 592,
pp. 465-518 (June 1985)
- Lloyd B. Robinson and E. Joseph Wampler, 1973.
Shakhbazian I: A Distant Cluster of Compact Galaxies.
Astrophysical Journal, Vol. 179, pp. L135-L139 (February 1973)
- Helen Sawyer Hogg, 1958.
Globular Star Clusters.
Journal of the Royal Astronomical Society of Canada, Vol. 52, No. 3,
pp. 97-108 (June 1958)
- Helen Sawyer Hogg, 1959.
Handbuch der Physik, Volume 53, pp. 129-
Appendix B, Catalogue of Globular Clusters.
- J. Ruprecht, B. Balazs, R.E. White, and
A.S. Sharov, 1983.
Soviet Astronomy, Vol. 27, Issue 3, p. 358 (June 1983)
- R.K. Shakhbazian, 1957.
Russ. Astr. Circ., No. 177, p. 11
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