55 Andromedae
Template:Location mark Location of 55 Andromedae (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.42[2] |
| Characteristics | |
| Spectral type | K1 III[3] |
| U−B Template:Engvar | +1.41[4] |
| B−V Template:Engvar | +1.32[4] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: −10.073[1] mas/yr Dec.: −4.483[1] mas/yr |
| Parallax (π) | 4.4619±0.1001 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −1.00[2] |
| Details | |
| Luminosity | 436.43[2] Template:Solar luminosity |
| Surface gravity (log g) | 2.30[3] cgs |
| Temperature | 4,290[3] K |
| Metallicity [Fe/H] | −0.14[3] dex |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[6] | |
| Database references | |
| SIMBAD | data |
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55 Andromedae, abbreviated 55 And, is a single,[7] orange-hued star in the northern constellation of Andromeda. 55 Andromedae is the Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 5.42.[2] Based upon an annual parallax shift of Script error: No such module "val".,[1] it is located about 730 light years from the Sun. 55 And is moving closer to the Earth with a heliocentric radial velocity of −7.6 km/s.[5] It is a member of the Sirius supercluster.[8]
This is an aging giant star with a stellar classification of K1 III,[3] which indicates it has exhausted the hydrogen supply at its core and evolved away from the main sequence. It is radiating 436[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,290 K.[3] It has a magnitude 10.90 visual companion at an angular separation of Script error: No such module "val". along a position angle of 357° from 55 And. In 1828, this separation was just Script error: No such module "val"..[9]
References
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- ↑ Template:Cite simbad
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