Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Hydra |
Right ascension | 11h 39m 03.1036679378s [1] |
Declination | −28° 52′ 16.627821186″ [1] |
Apparent magnitude (V) | 20.52 [2] |
Characteristics | |
Spectral type | DC9 [2] |
U−B color index | 1.03 [3] |
B−V color index | 0.64 [3] |
R−I color index | 1.14 [3] |
Astrometry | |
Proper motion (μ) |
RA: -397.560
[1]
mas/
yr Dec.: +36.758 [1] mas/ yr |
Parallax (π) | 24.5 ± 1.0 mas [1] |
Distance | 133 ± 5
ly (41 ± 2 pc) |
Absolute magnitude (MV) | 17.47 [2] |
Details | |
Mass | 1.19±0.02 [3] M☉ |
Radius | 0.0126 [4] R☉ |
Luminosity | 1.15 ×10−5 [3] L☉ |
Surface gravity (log g) | 1.1 ×106 G [3] cgs |
Temperature | 4,490±80 [3] K |
Other designations | |
Ruiz 439-26, WD 1136-286
[1] | |
Database references | |
SIMBAD | data |
ESO 439-26 is the least luminous white dwarf star known. [2] [5] Located 140 light years away from the Sun, it is roughly 10 billion years old and has a temperature of 4560 Kelvin. Thus, despite being classified as a "white dwarf", it would actually appear yellowish in color. [6]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Hydra |
Right ascension | 11h 39m 03.1036679378s [1] |
Declination | −28° 52′ 16.627821186″ [1] |
Apparent magnitude (V) | 20.52 [2] |
Characteristics | |
Spectral type | DC9 [2] |
U−B color index | 1.03 [3] |
B−V color index | 0.64 [3] |
R−I color index | 1.14 [3] |
Astrometry | |
Proper motion (μ) |
RA: -397.560
[1]
mas/
yr Dec.: +36.758 [1] mas/ yr |
Parallax (π) | 24.5 ± 1.0 mas [1] |
Distance | 133 ± 5
ly (41 ± 2 pc) |
Absolute magnitude (MV) | 17.47 [2] |
Details | |
Mass | 1.19±0.02 [3] M☉ |
Radius | 0.0126 [4] R☉ |
Luminosity | 1.15 ×10−5 [3] L☉ |
Surface gravity (log g) | 1.1 ×106 G [3] cgs |
Temperature | 4,490±80 [3] K |
Other designations | |
Ruiz 439-26, WD 1136-286
[1] | |
Database references | |
SIMBAD | data |
ESO 439-26 is the least luminous white dwarf star known. [2] [5] Located 140 light years away from the Sun, it is roughly 10 billion years old and has a temperature of 4560 Kelvin. Thus, despite being classified as a "white dwarf", it would actually appear yellowish in color. [6]