Back Rho d'Andròmeda Catalan Rho Andromedae German رو زن برزنجیر Persian Rho Andromedae French Rho Andromedae Italian アンドロメダ座ロー星 Japanese 안드로메다자리 로 Korean Rho Andromedae Portuguese Rho Andromedae Romanian Ро Андромеды Russian

Rho Andromedae

Rho Andromedae
Diagram showing star positions and boundaries of the Andromeda constellation and its surroundings
Location of ρ Andromedae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension 00h 21m 07.26896s[1]
Declination +37° 58′ 06.9727″[1]
Apparent magnitude (V) +5.19[2]
Characteristics
Spectral type F5IV-V[3]
U−B color index +0.039[2]
B−V color index +0.424[2]
Astrometry
Radial velocity (Rv)+10.4±0.6[4] km/s
Proper motion (μ) RA: +57.599[1] mas/yr
Dec.: –38.378[1] mas/yr
Parallax (π)20.1874±0.1179 mas[1]
Distance161.6 ± 0.9 ly
(49.5 ± 0.3 pc)
Absolute magnitude (MV)+1.73[5]
Details
Radius3.37+0.07
−0.03[1] R☉
Luminosity17.93±0.13[1] L☉
Surface gravity (log g)3.84[6] cgs
Temperature6,471+25
−66[1] K
Metallicity [Fe/H]–0.09[6] dex
Rotational velocity (v sin i)44[6] km/s
Age1.3[5] Gyr
Other designations
ρ And, 27 Andromedae, BD+37 45, FK5 1009, HD 1671, HIP 1686, HR 82, SAO 53828, PPM 65222[7]
Database references
SIMBADdata

Rho Andromedae, Latinized from ρ Andromedae, is the Bayer designation for a star in the northern constellation of Andromeda. It has an apparent visual magnitude of +5.19,[2] which, according to the Bortle Dark-Sky Scale, is bright enough to be seen with the naked eye from dark suburban skies. Based upon parallax measurements, this star is at a distance of approximately 162 light-years (50 parsecs) from the Sun.[1] It is drifting further away with a radial velocity of +10 km/s.[4]

The stellar classification of this star is F5IV-V,[3] showing mixed spectral features of a main sequence and subgiant stage. It is about 1.3[5] billion years old with 3.4[1] times the girth of the Sun and is spinning with a projected rotational velocity of 44 km/s.[6] The outer envelope is radiating around 18 times the luminosity of the Sun from its photosphere at an effective temperature of 6,471 K,[1] giving it the yellow-white hue of an F-type star.[8] X-ray emissions were detected from this star during the EXOSAT mission.[9]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference aj73_84 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray_et_al_2001 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference aaa418_989 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference apj354 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 csiro was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aaa174_1_187 was invoked but never defined (see the help page).
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