Theta Ursae Minoris
From Infogalactic: the planetary knowledge core
 Theta in Ursa Minor. |
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| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 15h 31m 24.9s[1] |
| Declination | +77° 20′ 58″[1] |
| Apparent magnitude (V) | 5.00[1] |
| Characteristics | |
| Spectral type | K5III |
| Astrometry | |
| Radial velocity (Rv) | -25.30 ± 0.5 km/s |
| Proper motion (μ) | RA: -47.55 ± 0.37[2] mas/yr Dec.: 5.33 ± 0.43[2] mas/yr |
| Parallax (π) | 3.81 ± 0.37[2] mas |
| Distance | 860 ± 80 ly (260 ± 30 pc) |
| Details | |
| Radius | 4.8[3] R☉ |
| Luminosity | 1618[4] L☉ |
| Temperature | 4053 K[4] K |
| Other designations | |
Theta Ursae Minoris (θ UMi, θ Ursae Minoris) is a star in the constellation Ursa Minor. It is an orange giant of spectral type K5III with an apparent magnitude of +5.00. It is approximately 860 light years from Earth. Its diameter has been estimated as around 4.8 times that of the Sun,[3] and its luminosity approximately 1618 times that of the Sun and has a surface temperature of 4053 K.[4]
References
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