Eta Columbae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Columba |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 3.96[2] |
| Characteristics | |
| Spectral type | G8/K1 II[3] or K0 III[4] |
| U−B Template:Engvar | +1.08[2] |
| B−V Template:Engvar | +1.14[2] |
| Astrometry | |
| Radial velocity (Rv) | +17.0[4] km/s |
| Proper motion (μ) | RA: +18.39[1] mas/yr Dec.: −10.87[1] mas/yr |
| Parallax (π) | 6.91±0.12 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −2.10[5] |
| Details[4] | |
| Mass | 3.33 Template:Solar mass |
| Radius | 38.6[6] Template:Solar radius |
| Luminosity | 708 Template:Solar luminosity |
| Surface gravity (log g) | 1.72 cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | −0.01 dex |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| η Col, CD−42°2266, FK5 229, HD 40808, HIP 28328, HR 2120, SAO 217650.[7] | |
| Database references | |
| SIMBAD | data |
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Eta Columbae is a solitary[8] star near the southern boundary of the constellation Columba.[9] It is visible to the naked eye, having an apparent visual magnitude of 3.96.[2] Based upon an annual parallax shift of 6.91 mas,[1] it lies at a distance of roughly 472 light years from the Sun.
This is an orange-hued[9] K-type giant star with a stellar classification of K0 III,[4] or possibly a bright giant with a crossover class of G8/K1 II.[3] The measured angular diameter of this star, after correction for limb darkening, is Script error: No such module "val"..[10] At the estimated distance of this star, this yields a physical size of about 38.6 times the radius of the Sun.[6] It has an estimated 3.33 times the mass of the Sun and radiates 708 times the solar luminosity from its outer atmosphere at an effective temperature of 4,620 K.[4]
References
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- ↑ a b Script error: No such module "citation/CS1". The radius (R*) is given by:
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- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
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