70 Aquarii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 48m 30.21037s[1] |
| Declination | –10° 33′ 19.7073″[1] |
| Apparent magnitude (V) | 6.19[2] |
| Characteristics | |
| Spectral type | A9III–IV[3] |
| B−V color index | +0.28[2] |
| Variable type | Delta Scuti |
| Astrometry | |
| Radial velocity (Rv) | –5.8[4] km/s |
| Proper motion (μ) | RA: +31.92[1] mas/yr Dec.: +9.23[1] mas/yr |
| Parallax (π) | 8.64 ± 0.83[1] mas |
| Distance | 380 ± 40 ly (120 ± 10 pc) |
| Absolute magnitude (MV) | +0.88[5] |
| Details | |
| Luminosity | 38[5] L☉ |
| Surface gravity (log g) | 3.48[5] cgs |
| Temperature | 7,294[5] K |
| Rotational velocity (v sin i) | 110[6] km/s |
| Other designations | |
70 Aquarii (abbreviated 70 Aqr) is a star in the equatorial constellation of Aquarius. 70 Aquarii is the Flamsteed designation and it is a Delta Scuti-type variable with the variable star designation FM Aquarii.[5] The mean apparent visual magnitude of this star is 6.19[2] and it is around 380 light-years (120 parsecs) from Earth.[1]
References
- 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- 1 2 3 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa 27: 11, Bibcode:1968MNSSA..27...11C.
- ↑ Cowley, Anne; Fraquelli, Dorothy (February 1974), "MK Spectral Types for Some Bright F Stars", Publications of the Astronomical Society of the Pacific 86 (509): 70, Bibcode:1974PASP...86...70C, doi:10.1086/129562.
- ↑ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W.
- 1 2 3 4 5 Paunzen, E.; et al. (September 2002), "On the Period-Luminosity-Colour-Metallicity relation and the pulsational characteristics of lambda Bootis type stars", Astronomy and Astrophysics 392: 515–528, arXiv:astro-ph/0207494, Bibcode:2002A&A...392..515P, doi:10.1051/0004-6361:20020854
- ↑ Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943.
- ↑ "FM Aqr -- Variable Star of delta Sct type", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-16.
External links
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