14 Aquarii
14 Aquarii (abbreviated 14 Aqr) is red giant star. 14 Aquarii is the Flamsteed designation; it also bears the variable star designation IW Aquarii. It is a semiregular variable with an amplitude of less than a tenth of a magnitude, and shows variations on a timescale of just one day.[3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 21h 16m 17.77598s[1] |
| Declination | −09° 12′ 52.7669″[1] |
| Apparent magnitude (V) | 6.46[2] |
| Characteristics | |
| Spectral type | M4III:[3] |
| B−V color index | 1.57[2] |
| Variable type | Semiregular[3] |
| Astrometry | |
| Radial velocity (Rv) | 8.00[4] km/s |
| Proper motion (μ) | RA: -6.56[1] mas/yr Dec.: +2.87[1] mas/yr |
| Parallax (π) | 1.97 ± 0.42[1] mas |
| Distance | approx. 1,700 ly (approx. 500 pc) |
| Absolute magnitude (MV) | -2.3[3] |
| Details | |
| Mass | 2.9[3] M☉ |
| Radius | 179[3] R☉ |
| Temperature | 3,700[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
- 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, S2CID 18759600.
- Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
- Koen, Chris; Laney, Dave (2000). "Rapidly oscillating M giant stars?". Monthly Notices of the Royal Astronomical Society. 311 (3): 636. Bibcode:2000MNRAS.311..636K. doi:10.1046/j.1365-8711.2000.03127.x.
- Kharchenko, N. V.; Scholz, R.-D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID 119323941.
External links
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