26 Arietis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 30m 38.41773s[1] |
| Declination | +19° 51′ 19.0891″[1] |
| Apparent magnitude (V) | 6.14[2] |
| Characteristics | |
| Spectral type | A9 V[3] |
| U−B color index | +0.102[2] |
| B−V color index | +0.248[2] |
| Variable type | Delta Scuti variable |
| Astrometry | |
| Radial velocity (Rv) | +15.0[4] km/s |
| Proper motion (μ) | RA: +80.41[1] mas/yr Dec.: -35.17[1] mas/yr |
| Parallax (π) | 15.14 ± 0.46 mas[1] |
| Distance | 215 ± 7 ly (66 ± 2 pc) |
| Absolute magnitude (MV) | 1.89[5] |
| Details | |
| Luminosity | 15[5] L☉ |
| Surface gravity (log g) | 3.84[5] cgs |
| Temperature | 7,430[5] K |
| Rotational velocity (v sin i) | 186[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
26 Arietis (abbreviated 26 Ari) is a variable star in the northern constellation of Aries. 26 Arietis is the Flamsteed designation; it also bears the variable star designation UU Arietis. The apparent visual magnitude of this star is 6.14,[2] which, according to the Bortle Dark-Sky Scale, is within the naked eye visibility limit in dark rural skies. This is an A-type main sequence star with a stellar classification of A9 V.[3] It is a Delta Scuti variable[5] with a variability period of 0.0676 days and an amplitude of 0.010 in magnitude.[8] The annual parallax shift of 15.14 mas is equivalent to a distance of approximately 215 light-years (66 parsecs) from Earth.
References
- ^ a b c d e 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.
- ^ a b c d Breger, M. (March 1968), "UBV and narrow-band UVBY photometry of bright stars", Astronomical Journal, 73: 84–85, Bibcode:1968AJ.....73...84B, doi:10.1086/110602.
- ^ a b Palmer, D. R.; et al. (1968), "The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars", Royal Observatory Bulletin, 135: 385, Bibcode:1968RGOB..135..385P.
- ^ Wielen, R.; et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions, Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W.
- ^ a b c d e 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.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
- ^ "UU Ari". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-18.
- ^ Rodríguez, E.; López-González, M. J.; López de Coca, P. (June 2000), "A revised catalogue of delta Sct stars", Astronomy and Astrophysics Supplement, 144: 469–474, Bibcode:2000A&AS..144..469R, doi:10.1051/aas:2000221.
External links
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