MB 3
| Galaxy MB 3 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Cassiopeia |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 55 m 42.7 s |
| declination | + 58 ° 51 ′ 37 ″ |
| Appearance | |
| Morphological type | dSph |
| Brightness (visual) | 17.33 mag |
| Angular expansion | 1.6 ′ × 0.5 ′ |
| Physical data | |
| Affiliation | Maffei group |
| Redshift | 0.000197 ± 0.000002 |
| Radial velocity | 59 ± 1 km / s |
|
Stroke distance v rad / H 0 |
(9 ± 1) x 10 6 ly (2.83 ± 0.21) Mpc |
| diameter | 7,000 ly |
| history | |
| Discovery date | 1997 |
| Catalog names | |
| PGC 166069 • 2MASX J02554290 + 5851394 • KK 22 • MB 3 • LDCE 264 NED003 | |
| Companion of Dwingeloo 1 | |
The MB 3 is a spheroidal dwarf galaxy in the constellation Cassiopeia at the northern sky . It is estimated to be 9 million light years from the Milky Way and about 7,000 ly in diameter.
MB 3 is a satellite galaxy of Dwingeloo 1 and is located in the Galactic Plane of the Milky Way, the so-called Zone of Avoidance , which makes observation much more difficult.
The object was discovered in 1997 during an optical survey by the Maffei group .
properties
The dwarf galaxy is a member of the Maffei Group, a galaxy group in the vicinity of the Local Group . The visible diameter of MB 3 is approximately 1.9 arc minutes , which corresponds to an absolute value of about 2 kpc at its distance of non 3 M pc .
Optical images show it as a flattened, oval and diffuse nebula about 9.2 arc minutes away from Dwingeloo 1. No molecular or neutral hydrogen gas could be detected in the dwarf galaxy, matching the classification as a spheroid dwarf galaxy.
Web links
Individual evidence
- ↑ a b c d NASA / IPAC EXTRAGALACTIC DATABASE
- ^ A b Buta, RJ, McCall, ML: "The IC 342 / Maffei Group Revealed" . In: The Astrophysical Journal Supplement Series . 124, 1999, p. 33. doi : 10.1086 / 313255 .
- ^ A b McCall, ML, Buta, RJ: "Discovery of a Second Companion of Dwingeloo 1" . In: The Astronomical Journal . 113, 1997, p. 981. doi : 10.1086 / 118314 .
- ↑ Karachentsev, ID: "The Local Group and Other Neighboring Galaxy Groups" . In: The Astronomical Journal . 129, 2005, p. 178. doi : 10.1086 / 426368 .