Sextans A
| Dates of Sextans A | |
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Sextans A, taken at the Cerro Tololo Inter-American Observatory |
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| Constellation | sextant |
| Position ( equinox : J2000.0 ) | |
| Right ascension | 10h 11m 1.3s |
| declination | −04 ° 42 '48 " |
| Appearance | |
| Type | Ir + V |
| Apparent brightness (visual) | +11.9 m |
| Apparent diameter | 5.9 '× 4.9' |
| Surface brightness | +15.0 mag / arcmin 2 |
| Physical data | |
| Affiliation | NGC 3109 Group, Local Group |
| distance | approx. 4.3 million light years |
| Redshift | +0.00108 ± 0.00001 |
| Heliocentric radial relative speed | +324 ± 2 km / s |
| Absolute brightness (visual) | −13.9 M. |
| Absolute diameter | about 5000 light years |
| Dimensions | |
| Catalog names | |
| UGCA 205, DDO 75, PGC 29653, MCG -01-26-030, IRAS F10085-0427, HIPASS J1010-04 | |
Sextans A (also known as UGCA 205 and DDO 75 ) is a relatively small, irregular dwarf galaxy . It is located in the local group 4.3 million light years from Earth and has a diameter of almost 5000 light years. Sextans A is among the most distant members of the local group and is a member of the NGC-3109 subgroup. In the night sky it appears in the constellation Sextant .
Sextans A was discovered by Fritz Zwicky in 1942 .
Individual evidence
- ↑ Andrew E. Dolphin et al. (March 2003): Deep Hubble Space Telescope Imaging of Sextans A. II. Cepheids and Distance (PDF), in: The Astronomical Journal, 125: 1261.