Van Maanen's star
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| Observation data Equinox J2000 |
|
|---|---|
| Constellation | Pisces |
| Right ascension | 00h 49m 09.9s |
| Declination | +05° 23' 19" |
| Apparent magnitude (V) | 12.40 |
| Characteristics | |
| Spectral type | WDZ7 |
| U-B color index | 0.02 |
| B-V color index | 0.55 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | +41.7 km/s |
| Proper motion (μ) | RA: 1233.05 mas/yr Dec.: -2710.56 mas/yr |
| Parallax (π) | 231.88 ± 1.79 mas |
| Distance | 14.1 ± 0.1 ly (4.31 ± 0.03 pc) |
| Absolute magnitude (MV) | 14.23 |
| Other designations | |
Van Maanen's Star is a white dwarf, the second such star discovered and the third closest one to the Sun after Sirius B and Procyon B; it is also the nearest solitary white dwarf. It is located 14.1 light years from the Sun in the constellation Pisces, and has a relatively high proper motion of 2.98" annually. It is far too faint to be seen with the naked eye.
Its mass is about 7/10 that of the Sun, but its diameter and brightness are far less.
It was discovered in 1917 by Adriaan Van Maanen.
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