Teegarden's Star
Teegarden's Star /ˈtiːɡɑːrdənz/ (SO J025300.5+165258, 2MASS J02530084+1652532, LSPM J0253+1652) is an M-type red dwarf in the constellation Aries, 12.5 light-years (3.8 parsecs) from the Solar System. Although it is near Earth it is a dim magnitude 15 and can only be seen through large telescopes. This star was found to have a very large proper motion of about 5 arcseconds per year. Only seven stars with such large proper motions are currently known. Teegarden's Star hosts a planetary system with at least three planets.
Teegarden's Star (top, center) is the 24th-nearest known star (system) to the Solar System. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 53m 00.89179s |
| Declination | +16° 52′ 52.6322″ |
| Apparent magnitude (V) | 15.13 |
| Characteristics | |
| Spectral type | M7.0 V |
| Apparent magnitude (B) | ~17.21 |
| Apparent magnitude (V) | ~15.40 |
| Apparent magnitude (R) | ~14.1 |
| Apparent magnitude (I) | ~10.4 |
| Apparent magnitude (J) | 8.394 ± 0.027 |
| Apparent magnitude (H) | 7.883 ± 0.040 |
| Apparent magnitude (K) | 7.585 ± 0.046 |
| Astrometry | |
| Radial velocity (Rv) | 68.3 km/s |
| Proper motion (μ) | RA: +3,429.083 mas/yr Dec.: −3,805.541 mas/yr |
| Parallax (π) | 260.9884 ± 0.0934 mas |
| Distance | 12.497 ± 0.004 ly (3.832 ± 0.001 pc) |
| Absolute magnitude (MV) | 17.22 |
| Details | |
| Mass | 0.097±0.010 M☉ |
| Radius | 0.120±0.012 R☉ |
| Luminosity | 0.000722±0.000005 L☉ |
| Surface gravity (log g) | 5.19±0.2 cgs |
| Temperature | 3,034±45 K |
| Metallicity [Fe/H] | −0.11±0.28 dex |
| Rotation | 99.6±1.4 days |
| Rotational velocity (v sin i) | <2 km/s |
| Age | >8 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Teegarden's Star Location of Teegarden's Star in the constellation Aries | |
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