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3 Persei

3 Persei
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 01h 58m 33.50596s[1]
Declination +49° 12′ 15.6705″[1]
Apparent magnitude (V) 5.70[2]
Characteristics
Spectral type K0 IV[3]
Astrometry
Radial velocity (Rv)−0.67±0.17[4] km/s
Proper motion (μ) RA: +7.051[1] mas/yr
Dec.: +41.686[1] mas/yr
Parallax (π)12.6940 ± 0.0671 mas[1]
Distance257 ± 1 ly
(78.8 ± 0.4 pc)
Absolute magnitude (MV)1.33[2]
Details[5]
Mass1.41±0.17 M☉
Radius8.27±0.55 R☉
Luminosity37.2+7.5
−6.3 L☉
Surface gravity (log g)2.72±0.09 cgs
Temperature4,757±25 K
Metallicity [Fe/H]−0.15±0.05 dex
Rotational velocity (v sin i)1.85±0.45 km/s
Age2.91±0.98 Gyr
Other designations
3 Per, BD+48°576, HD 11949, HIP 9222, HR 568, SAO 37665[6]
Database references
SIMBADdata

3 Persei is a single,[7] orange-hued star in the northern constellation of Perseus. It is dimly visible to the naked eye under good viewing conditions, having an apparent visual magnitude of 5.70[2] The star is located around 79 parsecs (257 ly) distant, based upon an annual parallax shift of 12.7 mas.

This star has a stellar classification of K0 IV,[3] suggesting it is a K-type subgiant – an evolved star that has used up its core hydrogen and is evolving to become a red giant. However, da Silva et al. (2015) categorized it as a giant star proper.[8] At the age of around three billion years, it has an estimated 1.4 times the mass of the Sun and has expanded to move than 8 times the Sun's radius. It is radiating roughly 37 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,757 K.[5]

  1. ^ a b c d e Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference cowley1979 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Jofre2015 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference DaSilva2015 was invoked but never defined (see the help page).
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