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36 Persei

36 Persei
Location of 36 Persei (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03h 32m 26.25886s[1]
Declination 46° 03′ 24.7029″[1]
Apparent magnitude (V) 5.32[2]
Characteristics
Spectral type F4III[3]
U−B color index −0.02[2]
B−V color index +0.41[2]
Astrometry
Radial velocity (Rv)−47.5[4] km/s
Proper motion (μ) RA: −52.829[1] mas/yr
Dec.: −74.915[1] mas/yr
Parallax (π)26.9895 ± 0.1053 mas[1]
Distance120.8 ± 0.5 ly
(37.1 ± 0.1 pc)
Absolute magnitude (MV)2.50[5]
Details
Mass1.50[4] M☉
Radius2.28+0.13
−0.09[1] R☉
Luminosity8.585±0.042[1] L☉
Surface gravity (log g)3.94[4] cgs
Temperature6,546+126
−176[1] K
Metallicity [Fe/H]−0.17[4] dex
Rotational velocity (v sin i)28.0[6] km/s
Age2.20[4] Gyr
Other designations
36 Per, NSV 1182, BD+45°778, FK5 2249, GC 4210, HD 21770, HIP 16499, HR 1069, SAO 38924[7]
Database references
SIMBADdata

36 Persei is a solitary,[8] variable star located 121 light years away from the Sun in the northern constellation of Perseus. It is visible to the naked eye as a dim, yellow-white hued point of light with a baseline apparent visual magnitude of 5.32.[2] The star is drifting closer to the Sun with a heliocentric radial velocity of −47.5 km/s,[4] and may come as close as 36.6 light-years in 661,000 years.[5]

The stellar classification of 36 Persei is F4III,[3] matching an aging giant star that has used up its core hydrogen. This object is used by astronomers as a spectral standard for stars with a similar class.[9] The star is a suspected variable of unknown type, ranging in visual magnitude from 5.29 down to 5.33,[10] and is a source of X-ray emission.[11] The star is 2.2[4] billion years old with a projected rotational velocity of 28 km/s.[6] It has an estimated 1.5[4] times the mass of the Sun and has not yet expanded significantly, having 2.3[1] times the Sun's girth. The star is radiating 8.6[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,546 [1]

  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 Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Ljunggren1961 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference XHIP was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference deMedeiros2014 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 Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference garcia1989 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Haakonsen2009 was invoked but never defined (see the help page).
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