Gliese 440
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Musca |
| Right ascension | 11h 45m 42.91694s |
| Declination | −64° 50′ 29.4620″ |
| Apparent magnitude (V) | 11.50 |
| Characteristics | |
| Spectral type | DQ6 |
| U−B color index | -0.59 |
| B−V color index | +0.19 |
| Astrometry | |
| Proper motion (μ) | RA: 2661.640 mas/yr Dec.: -344.933 mas/yr |
| Parallax (π) | 215.6753±0.0181 mas |
| Distance | 15.123 ± 0.001 ly (4.6366 ± 0.0004 pc) |
| Absolute magnitude (MV) | +13.17±0.03 |
| Details | |
| Mass | 0.56±0.08 M☉ |
| Radius | 0.0127±0.0003 R☉ |
| Luminosity | 5.25+0.64 −0.57×10−4 L☉ |
| Surface gravity (log g) | 7.983±0.016 cgs |
| Temperature | 7,837+87 −82 K |
| Age | (as white dwarf) 1.21±0.09 Gyr |
| Other designations | |
| GJ 440, HIP 57367, BPM 7108, Ci 20 658, EGGR 82, L 145-141, LAWD 37, LHS 43, LP 145-141, LPM 396, LTT 4364, NLTT 28447, PLX 2716, PM 11429-6434, WD 1142-645, TYC 8981-4417-1, GSC 08981-04418, 2MASS J11454297-6450297 | |
| Database references | |
| SIMBAD | data |
Location of Gliese 440 in the constellation Musca | |
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Gliese 440, also known as LP 145-141 or LAWD 37, is a white dwarf located 15.1 light-years (4.6 parsecs) from the Solar System in the constellation Musca, the nearest star in this constellation. It is the fourth closest white dwarf, after Sirius B, Procyon B, and van Maanen's star. Despite its closeness, Gliese 440 is intrinsically faint with just 0.05% the luminosity of the Sun, and can not be viewed to the naked eye with an apparent magnitude of +11.5.