55 Persei

55 Persei

55 Persei in optical light
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 04h 24m 29.1556s[1]
Declination +34° 07′ 50.728″[1]
Apparent magnitude (V) 5.73[2]
Characteristics
Spectral type B8 V[2]
B−V color index −0.054±0.004[2]
Astrometry
Radial velocity (Rv)+8.5±3.5[3] km/s
Proper motion (μ) RA: +21.092 [1] mas/yr
Dec.: −34.137 [1] mas/yr
Parallax (π)8.50 ± 0.38 mas[4]
Distance380 ± 20 ly
(118 ± 5 pc)
Absolute magnitude (MV)−0.39[5]
Details
Mass3.44±0.07[6] M☉
Radius3.0[7] R☉
Luminosity193+24
−21[6] L☉
Temperature12,246±85[6] K
Rotational velocity (v sin i)288[6] km/s
Age197[5] Myr
Other designations
55 Per, BD+33° 853, HD 27777, HIP 20579, HR 1377, SAO 57212[8]
Database references
SIMBADdata

55 Persei is a single,[9] blue-white hued star in the northern constellation Perseus. It is faintly visible to the naked eye under good seeing conditions, having an apparent visual magnitude of 5.73.[2] Based upon an annual parallax shift of 8.50±0.38 mas[4] as seen from Earth's orbit, the star is located about 380 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction of 0.39[5] due to interstellar dust.

This is a B-type main-sequence star with a stellar classification of B8 V;[2] a massive star that is generating energy through hydrogen fusion at its core. It has 3.44[6] times the mass of the Sun and about 3[7] times the Sun's radius. The star is about 197[5] million years old and is spinning rapidly with a projected rotational velocity of 288 km/s.[6] It is radiating roughly 193[6] times the Sun's luminosity from its photosphere at an effective temperature of 12,246 K.[6]

  1. ^ a b c d Cite error: The named reference Gaia2016 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f g h Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference cadars2001 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).