T Ursae Minoris
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 13h 34m 41.072s |
| Declination | +73° 25′ 53.08″ |
| Apparent magnitude (V) | 7.8 - 15 |
| Characteristics | |
| Spectral type | M4e-M6e |
| Variable type | SR (previously Mira) |
| Astrometry | |
| Radial velocity (Rv) | −9 km/s |
| Proper motion (μ) | RA: −12.919 mas/yr Dec.: +5.826 mas/yr |
| Parallax (π) | 0.7843±0.0502 mas |
| Distance | 4,200 ± 300 ly (1,280 ± 80 pc) |
| Details | |
| Before onset of period change | |
| Mass | 1.66±0.10 M☉ |
| Radius | 290±15 R☉ |
| Luminosity | 4,080 L☉ |
| Temperature | 3,200±30 K |
| Metallicity [Fe/H] | −0.07 dex |
| Age | 0.17±0.21 Gyr |
| Other designations | |
| T UMi, HD 118556, TYC 4408-163-1, GSC 04408-00163, 2MASS J13344108+7325530, Gaia DR2 1688437478979868288 | |
| Database references | |
| SIMBAD | data |
T Ursae Minoris (T UMi) is a variable star in the constellation Ursa Minor, located 2′30″ west-southwest of 3 Ursae Minoris toward the western border of the constellation with Draco.