54 Arietis

54 Arietis

A light curve for 54 Arietis, plotted from Hipparcos data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 03h 08m 21.10890s[2]
Declination +18° 47′ 42.1886″[2]
Apparent magnitude (V) 6.27[3]
Characteristics
Evolutionary stage AGB[4]
Spectral type M0 III[5]
B−V color index 1.560±0.014[6]
Astrometry
Radial velocity (Rv)+44.32±0.22[2] km/s
Proper motion (μ) RA: +38.133[2] mas/yr
Dec.: −14.295[2] mas/yr
Parallax (π)4.3947 ± 0.1037 mas[2]
Distance740 ± 20 ly
(228 ± 5 pc)
Absolute magnitude (MV)−0.54[6]
Details
Radius40.7+3.0
−2.6[2] R☉
Luminosity387±11[2] L☉
Temperature4013+137
−141[2] K
Other designations
54 Ari, BD+18°414, FK5 4285, GC 3742, HD 19460, HIP 14586, HR 940, SAO 93293[7]
Database references
SIMBADdata

54 Arietis is a star in the northern zodiac constellation of Aries. 54 Arietis is the Flamsteed designation. It is a challenge to view with the naked eye even under good viewing conditions, having an apparent visual magnitude of 6.27.[3] Based upon an annual parallax shift of 4.39 mas, it is located approximately 740 light-years (230 parsecs) distant from Earth, and it is drifting further away with a radial velocity of +44 km/s.[2] The brightness of the star is diminished by 0.15[8] in magnitude from extinction caused by interstellar gas and dust. The star is positioned near the ecliptic and thus is subject to lunar occultations.[9]

This is an aging red giant star with a stellar classification of M0 III[5] that is currently evolving along the asymptotic giant branch.[4] Having exhausted the supply of hydrogen at its core, the star has expanded to 41[2] times the Sun's radius. It varies slightly in brightness, with a periodicity of 6.2 days and an amplitude change of 0.0096 in magnitude.[5] On average it is radiating 387[2] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,013 K.[2]

  1. ^ Cite error: The named reference CDS was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k l m Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference mnras133_475 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference aj104_1_275 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference mnras331_1_45 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa430_165 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eitter1979 was invoked but never defined (see the help page).