4 Equulei

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4 Equulei
Observation data
Epoch J2000      Equinox J2000
Constellation Equuleus
Right ascension 21h 05m 26.79s
Declination 05° 57 30.6
Apparent magnitude (V)5.94
Characteristics
Spectral typeF8V
B−V color index0.54[1]
R−I color index0.20[1]
Astrometry
Radial velocity (Rv)-12.70 ± 0.30[1] km/s
Proper motion (μ) RA: -89.10 ± 1.10[1] mas/yr
Dec.: -129.90 ± 1.10[1] mas/yr
Parallax (π)27.06 ± 1.07[1] mas
Distance120.4[2] ly
(36.91[2] pc)
Absolute magnitude (MV)3.1
Details
Mass1.2[2] M
Radiusapprox 1.2[2] R
Luminosity2[2] L
Temperature6200 K
Metallicity [Fe/H]-0.04 ± 0.01 [1] dex
Other designations
HIP104101, HD200790

4 Equulei is a double star in the constellation of Equuleus.

Properties

The main component is a F-type main sequence star at an age of 2.2 billion years. It weighs 2.4×1030 kilograms. This star also has a luminosity of 2 times the Sun's luminosity.

See also

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "4 Equulei, a white main-sequence star in Equuleus", Ashland Astronomy Studio, retrieved 2012-08-19 
  2. 2.0 2.1 2.2 2.3 2.4 "HIP 104101", Wolfram Alpha, retrieved 2012-08-19 


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