Back Rho d'Andròmeda Catalan Rho Andromedae German رو زن برزنجیر Persian Rho Andromedae French Rho Andromedae Italian 안드로메다자리 로 Korean Rho Andromedae Portuguese Rho Andromedae Romanian Ро Андромеды Russian Rho Andromedae Swedish

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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