26 Arietis

26 Arietis

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]
Distance237 ± 1 ly
(72.6 ± 0.4 pc)
Absolute magnitude (MV)1.89[7]
Details
Mass1.74[8] M☉
Radius2.32+0.11
−0.12[2] R☉
Luminosity15[7] L☉
Surface gravity (log g)3.84[7] cgs
Temperature7,430[7] K
Rotational velocity (v sin i)186[9] km/s
Age1.075[8] Gyr
Other designations
26 Ari, UU Arietis, BD+19°365, FK5 2172, HD 15550, HIP 11678, HR 729, SAO 92979[10]
Database references
SIMBADdata

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]

  1. ^ Cite error: The named reference Breger was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference rob135_385 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference aj73_84 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference scfs was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference aaa392_515 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aaa463_2_671 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference aas144_469 was invoked but never defined (see the help page).