26 Arietis

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26 Arietis
26AriLightCurve.png
A visual band light curve for 26 Arietis, adapted from Breger (1969) [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Aries
Right ascension 02h 30m 38.41727s [2]
Declination +19° 51 19.0917 [2]
Apparent magnitude  (V)6.10 - 6.15 [3]
Characteristics
Spectral type A9 V [4]
U−B color index +0.102 [5]
B−V color index +0.248 [5]
Variable type Delta Scuti variable [3]
Astrometry
Radial velocity (Rv)+15.0 [6]  km/s
Proper motion (μ)RA: +79.814 [2]   mas/yr
Dec.: −34.746 [2]   mas/yr
Parallax (π)13.7810 ± 0.0831  mas [2]
Distance 237 ± 1  ly
(72.6 ± 0.4  pc)
Absolute magnitude  (MV)1.89 [7]
Details
Mass 1.74 [8]   M
Radius 2.32+0.11
−0.12
[2]   R
Luminosity 15 [7]   L
Surface gravity (log g)3.84 [7]   cgs
Temperature 7,430 [7]   K
Rotational velocity (v sin i)186 [9]  km/s
Age 1.075 [8]   Gyr
Other designations
26 Ari, UU Arietis, BD+19°365, FK5  2172, HD  15550, HIP  11678, HR  729, SAO  92979 [10]
Database references
SIMBAD data

26 Arietis 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, [5] which, according to the Bortle Dark-Sky Scale, is within the naked eye visibility limit in dark rural skies. The annual parallax shift of 13.78  mas [2] is equivalent to a distance of approximately 215 light-years (66 parsecs ) from Earth. The star is receding from the Earth with a heliocentric radial velocity of +15 km/s. [6]

This is an A-type main sequence star with a stellar classification of A9 V. [4] It is a Delta Scuti variable [7] with a variability period of 0.0676 days and an amplitude of 0.010 in magnitude. [11] The star is around a billion years old with 1.74 [8] times the mass of the Sun and 2.32 [2] times the Sun's radius. The star is radiating 15 times the luminosity of the Sun from its photosphere at an effective temperature of 7,430 K. [7]

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References

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  10. "UU Ari". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2012-07-18.
  11. Rodríguez, E.; et al. (June 2000), "A revised catalogue of delta Sct stars", Astronomy and Astrophysics Supplement, 144 (3): 469–474, Bibcode:2000A&AS..144..469R, doi: 10.1051/aas:2000221 .