26 Arietis

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[1] mas
Distance215 ± 7 ly
(66 ± 2 pc)
Absolute magnitude (MV)1.89[5]
Details
Luminosity15[5] L☉
Surface gravity (log g)3.84[5] cgs
Temperature7,430[5] K
Rotational velocity (v sin i)186[6] km/s
Other designations
UU Arietis, BD+19 365, FK5 2172, HD 15550, HIP 11678, HR 729, SAO 92979.[7]

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

  1. 1 2 3 4 5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 4 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.
  3. 1 2 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.
  4. ↑ Wielen, R.; et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W.
  5. 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/0207494Freely accessible, Bibcode:2002A&A...392..515P, doi:10.1051/0004-6361:20020854.
  6. ↑ 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/0610785Freely accessible, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
  7. ↑ "UU Ari -- Variable Star of delta Sct type", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-18.
  8. ↑ 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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