2 Ursae Minoris
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cepheus[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 4.244[3] |
| Characteristics | |
| Spectral type | K2 II-III[4] |
| B−V Template:Engvar | Script error: No such module "val".[1] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: Script error: No such module "val".[2] mas/yr Dec.: Script error: No such module "val".[2] mas/yr |
| Parallax (π) | 11.64±0.15 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.43[1] |
| Details | |
| Mass | Script error: No such module "val".[6] Template:Solar mass |
| Radius | Script error: No such module "val".[5] Template:Solar radius |
| Luminosity | Script error: No such module "val".[5] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[3] cgs |
| Temperature | Script error: No such module "val".[5] K |
| Metallicity [Fe/H] | Script error: No such module "val".[3] dex |
| Rotational velocity (v sin i) | 1.0[7] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
2 Ursae Minoris (2 UMi) is a single[9] star a few degrees away from the northern celestial pole. Despite its Flamsteed designation, the star is actually located in the constellation Cepheus. This change occurred when the constellation boundaries were formally set in 1930 by Eugene Delporte. Therefore, the star is usually referred only by its catalog numbers such as HR 285 or HD 5848. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.244.[3] This object is located 280 light years away and is moving further from the Earth with a heliocentric radial velocity of +8 km/s.[5] It is a candidate member of the Hyades Supercluster.[3]
This is an aging K-type star with a stellar classification of K2 II-III,[4] showing a luminosity class with blended traits of a giant and a bright giant. It has 2.3[6] times the mass of the Sun and has expanded to 24[5] times the Sun's radius. The star is radiating around 215[5] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,513 K.[5]
References
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- ↑ a b c Template:Cite XHIP
- ↑ a b c d e Script error: No such module "citation/CS1".
- ↑ a b c d e Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b c d e f g h Template:Cite DR2
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
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