39 Andromedae
Template:Location mark Location of 39 Andromedae (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.95[2] |
| Characteristics | |
| Spectral type | kA3hA7VmA9[3] |
| B−V Template:Engvar | Script error: No such module "val".[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[4] km/s |
| Proper motion (μ) | RA: −17.558[1] mas/yr Dec.: −18.400[1] mas/yr |
| Parallax (π) | 9.5725±0.0805 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.80[2] |
| Details | |
| Radius | 1.2[5] Template:Solar radius |
| Luminosity | 39.95[2] Template:Solar luminosity |
| Surface gravity (log g) | 3.93[6] cgs |
| Temperature | 8,073[6] K |
| Metallicity [Fe/H] | +0.13[6] dex |
| Rotational velocity (v sin i) | 34[6] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
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39 Andromedae, abbreviated 39 And, is a double star in the northern constellation Andromeda. 39 Andromedae is the Flamsteed designation. Its apparent visual magnitude is 5.95,[2] which indicates it is near the lower limit on visibility to the naked eye. The distance to this star, as estimated from its annual parallax shift of Script error: No such module "val".,[1] is 341 light years. It is a suspected member of the Ursa Major Moving Group, although King et al. (2003) list it as a probable non-member.[8]
The brighter component is a confirmed Am star[9] with a stellar classification of kA3hA7VmA9.[3] This notation indicates its spectrum displays the calcium K line of an A3 star, the hydrogen lines of an A7 V, or A-type main-sequence star, and the metal lines of an A9 star. It is radiating 40[2] times the Sun's luminosity from its photosphere at an effective temperature of 8,073 K.[6] As of 2015, the magnitude 12.48 companion star is located at an angular separation of Script error: No such module "val". along a position angle of 3° from the primary.[10]
References
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- ↑ a b c d e Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
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