PHL 293B
| PHL 293B | |
|---|---|
Hubble Space Telescope image of PHL 293B; the purported luminous blue variable is located near the core of the galaxy | |
| Observation data (J2000 epoch) | |
| Constellation | Aquarius |
| Right ascension | 22h 30m 36.8s |
| Declination | −00° 06′ 37″ |
| Redshift | 0.0051 |
| Heliocentric radial velocity | 1,606 km/s |
| Galactocentric velocity | 1,723±10 km/s |
| Distance | 75.51 ± 8.072 Mly (23.150 ± 2.475 Mpc) |
| Apparent magnitude (V) | 16.87 |
| Apparent magnitude (B) | 17.35 |
| Characteristics | |
| Type | compact Im? HII |
| Size | 5,450 ly × 4,960 ly (1.67 kpc × 1.52 kpc) (diameter; 25.0 B-mag arcsec−2) |
| Apparent size (V) | 0.24′ × 0.20′ |
| Other designations | |
| Kinman's Dwarf, PGC 69018 | |
| Observation data Epoch J1950 Equinox J1950 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 28.1m |
| Declination | −0° 22′ |
| Characteristics | |
| Evolutionary stage | Luminous blue variable? |
| Astrometry | |
| Radial velocity (Rv) | (of galaxy) 1,606 km/s |
| Distance | 23,150,000±2,475,000 pc |
| Details | |
| Radius | 1,348–1,463 R☉ |
| Luminosity | 2,500,000–3,500,000 L☉ |
| Temperature | 6,000–6,800 K |
| Other designations | |
| SDSS J2230–0006, SDSS J223036.79-000636.9, A2228-00 | |
| Database references | |
| SIMBAD | PHL 293B |
| PHL 293 (Simbad mistakenly showing results for PHL 293B) | |
PHL 293B, also known as Kinman's dwarf, is a low-metallicity blue compact dwarf galaxy about 23.15 megaparsecs (75.51 million light-years) from the Earth in the constellation Aquarius.
It had a very likely associated, notable, blue-light, long-lived star with constant outbursts or a large supernova observed to have faded and which then disappeared. Although this bright visible jet-producing object responsible for broad hydrogen emission lines with P Cygni profiles was widely considered to be a luminous blue variable ejecting matter, other studies posited the mentioned, competing, explanations for the bright light source within.