Tau7 Serpentis
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Serpens[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 5.8[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | A8Vam[4] |
| U−B Template:Engvar | +0.11[5] |
| B−V Template:Engvar | +0.20[5] |
| R−I Template:Engvar | +0.10[5] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[2] km/s |
| Proper motion (μ) | RA: −61.654[2] mas/yr Dec.: +54.319[2] mas/yr |
| Parallax (π) | 18.7185±0.0408 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +2.18[1] |
| Details | |
| Mass | 1.8[6] Template:Solar mass |
| Radius | 1.8[6] Template:Solar radius |
| Luminosity | 11[6] Template:Solar luminosity |
| Surface gravity (log g) | 4.20[6] cgs |
| Temperature | 7,809[6] K |
| Metallicity [Fe/H] | −0.02[7] dex |
| Rotational velocity (v sin i) | 78[8] km/s |
| Age | 839[7] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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Tau7 Serpentis, Latinized from τ7 Serpentis, is an A-type star in the constellation of Serpens, 174 light-years from the Earth. It has an apparent visual magnitude of approximately 5.804. It is a well-known Am star, a type of chemically peculiar star with unusually strong lines of heavier elements (metals) due to slow rotation and stratification of elements in the star's atmosphere.[10]
References
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- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b c d e f g Template:Cite Gaia DR3
- ↑ Script error: No such module "Citation/CS1".
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- ↑ a b c HR 5845, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 19, 2008.
- ↑ a b c d e Script error: No such module "Citation/CS1".
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- ↑ * 22 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
- ↑ Script error: No such module "Citation/CS1".
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