GJ 1087
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Orion |
| Right ascension | 05h 56m 25.47s |
| Declination | +05° 21′ 48.6″ |
| Apparent magnitude (V) | 14.105 |
| Characteristics | |
| Spectral type | DAP8.9 |
| Apparent magnitude (B) | 14.69 |
| Apparent magnitude (V) | 14.10 |
| Apparent magnitude (R) | 14.0 |
| Apparent magnitude (I) | 13.6 |
| Apparent magnitude (J) | 12.930 ± 0.022 |
| Apparent magnitude (H) | 12.720 ± 0.025 |
| Apparent magnitude (K) | 12.653 ± 0.024 |
| Astrometry | |
| Proper motion (μ) |
RA: -434 mas/yr Dec.: -931 mas/yr |
| Parallax (π) | 125.0 ± 3.6mas |
| Distance | 26.1 ± 0.8 ly (8.0 ± 0.2 pc) |
| Absolute magnitude (MV) | 14.59 |
| Details | |
| Mass | 0.71 ± 0.03 M☉ |
| Radius | 0.011 R☉ |
| Surface gravity (log g) | 8.20 ± 0.05 cgs |
| Temperature | 5790 ± 110 K |
| Age | 3.97 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Coordinates: 
05h 56m 25.47s, +05° 21′ 48.6″
G 99-47 (V1201 Orionis) is a nearby degenerate star (white dwarf) of spectral class DAP8 (DAP8.9, or DAP8.7), the single known component of the system, located in the constellation Orion.
G 99-47 is probably the tenth closest white dwarf (or possibly the 9th–12th: see Gliese 293, Gliese 518 and Gliese 915). Its trigonometric parallax from the Yale Parallax Catalog is 0.1250 ± 0.0036 arcsec, corresponding to a distance 8.00 ± 0.23 pc, or 26.09 ± 0.75 ly.
G 99-47's mass is 0.71 ± 0.03 Solar masses; its surface gravity is 108.20 ± 0.05 (1.58 · 108) cm·s−2, or approximately 162 000 of Earth's, corresponding to a radius 7711 km, or 121% of Earth's.
Its temperature is 5790 ± 110 K, almost like the Sun's; its cooling age, i. e. age as degenerate star (not including lifetime as main sequence star and as giant star) is 3.97 Gyr. Due almost equal to the Sun's temperature, GJ 1087 should appear almost the same color as the Sun.
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