49 Andromedae

49 Andromedae
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 01h 30m 06.10154s[1]
Declination +47° 00′ 26.1860″[1]
Apparent magnitude (V) 5.269[2]
Characteristics
Spectral type K0 III[3]
B−V color index 0.993[2]
Astrometry
Radial velocity (Rv)−11.48[2] km/s
Proper motion (μ) RA: −0.939[1] mas/yr
Dec.: −42.969[1] mas/yr
Parallax (π)10.3989 ± 0.1605 mas[1]
Distance314 ± 5 ly
(96 ± 1 pc)
Absolute magnitude (MV)0.50[4]
Details
Mass2.07[2] M☉
Radius11[5] R☉
Luminosity70.8[2] L☉
Surface gravity (log g)2.30[6] cgs
Temperature4,879±106[2] K
Metallicity [Fe/H]+0.020±0.04[6] dex
Rotational velocity (v sin i)2.0[7] km/s
Age1.75[2] Gyr
Other designations
A And[8], 49 And, BD+46° 370, HD 9057, HIP 6999, HR 430, SAO 37275, PPM 44057, GSC 03282-02272[9]
Database references
SIMBADdata

49 Andromedae (abbreviated 49 And) is a star in the constellation Andromeda. 49 Andromedae is the Flamsteed designation though it also bears the Bayer designation A Andromedae. It is visible to the naked eye under good viewing conditions with an apparent visual magnitude of 5.269.[2] The distance to 49 Andromedae, as determined from its annual parallax shift of 10.4 mas,[1] is around 314 light-years. It is moving closer to the Sun with a heliocentric radial velocity of −11.5 km/s.[2]

With an estimated age of 1.75 Gyr[2] years, this is an aging red-clump[6] giant star with a stellar classification of K0 III,[3] indicating it is generating energy by helium fusion at its core. The spectrum displays "slightly strong" absorption lines of cyanogen (CN).[3] It has 2.07[2] times the mass of the Sun and has expanded to 11[5] times the Sun's radius. The star is radiating 71[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,879 K.[2]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 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 Luck2015 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Schmitt1971 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Tautvaisiene2013 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference DeMedeiros2000 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference uranometria1987 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).