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Nu Andromedae

Not to be confused with Andromeda V or 5 Andromedae.
"ν And" redirects here. For other uses, see Vand.
Nu Andromedae
Diagram showing star positions and boundaries of the Andromeda constellation and its surroundings
Location of ν Andromedae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 00h 49m 48.84737s[1]
Declination +41° 04′ 44.0764″[1]
Apparent magnitude (V) 4.522[2]
Characteristics
Spectral type B4/5 V[3][4] + F8 V[5]
U−B color index –0.573[2]
B−V color index –0.136[2]
Astrometry
Radial velocity (Rv)–23.9[6] km/s
Proper motion (μ) RA: +22.77 ±0.12[1] mas/yr
Dec.: –18.35 ±0.09[1] mas/yr
Parallax (π)5.28 ± 0.15 mas[1]
Distance620 ± 20 ly
(189 ± 5 pc)
Absolute magnitude (MV)−1.85[7]
Orbit[5]
Period (P)4.2827 d
Eccentricity (e)0.03
Longitude of the node (Ω)25.°
Periastron epoch (T)18155.67
Semi-amplitude (K1)
(primary)		71.7 km/s
Semi-amplitude (K2)
(secondary)		101.9 km/s
Details
ν And A
Mass5.9 ± 0.2[3] M☉
Radius3.4[8] R☉
Luminosity1,104[7] L☉
Surface gravity (log g)4.12 ± 0.43[9] cgs
Temperature14,851 ± 396[9] K
Metallicity [Fe/H]+0.14 ± 0.17[9] dex
Rotational velocity (v sin i)20[10] km/s
Age63.1 ± 17.9[3] Myr
Other designations
ν Andromedae, ν And, Nu And, Nu Andromedae 35 Andromedae, 35 And, BD+40 171, FK5 1021, HD 4727, HIP 3881, HR 226, SAO 36699, PPM 43365[11]
Database references
SIMBADdata

Nu Andromedae (Nu And, ν Andromedae, ν And) is a binary star in the constellation Andromeda. The system has an apparent visual magnitude of 4.5,[2] which is bright enough to be seen with the naked eye. It is approximately 620 light-years (190 parsecs) from Earth.[1] Situated just over a degree to the west of this star is the Andromeda Galaxy.[12]

Nu Andromedae is the prominent blue star in the upper right of this image. At the center is the Andromeda Galaxy.

Nu Andromedae is spectroscopic binary[3] system with a nearly circular orbit that has a period of 4.2828 days.[5] The primary component is a B-type main sequence star with a stellar classification of B5 V.[3] The fainter secondary has a classification of F8 V,[5] which makes it an F-type main sequence star. The pair is about 63 million years old.[3]

  1. ^ a b c d e f Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference aaass52_131 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference mnras410_1_190 was invoked but never defined (see the help page).
  4. ^ "Nu Andromedae, a blue main-sequence star in Andromeda". astrostudio.org. Archived from the original on 23 September 2015. Retrieved 18 August 2014.
  5. ^ a b c d Cite error: The named reference ncsbo was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference gcsrv was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa367_521 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference aaa538_A143 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference apj573_1_359 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference mollise2006 was invoked but never defined (see the help page).
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