50 Persei

50 Persei

A light curve for V582 Persei, plotted from Hipparcos data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Perseus
Right ascension 04h 08m 36.61660s[2]
Declination +38° 02′ 23.0488″[2]
Apparent magnitude (V) 5.52[3]
Characteristics
Spectral type F7 V[4]
U−B color index +0.00[3]
B−V color index +0.54[3]
Variable type RS CVn and BY Dra
Astrometry
Radial velocity (Rv)+26.2[5] km/s
Proper motion (μ) RA: +164.10[2] mas/yr
Dec.: −202.60[2] mas/yr
Parallax (π)47.63 ± 0.26 mas[2]
Distance68.5 ± 0.4 ly
(21.0 ± 0.1 pc)
Absolute magnitude (MV)3.87[6]
Details
Mass1.16[7] M☉
Surface gravity (log g)4.35[7] cgs
Temperature6,147[7] K
Metallicity [Fe/H]−0.11[7] dex
Rotational velocity (v sin i)20.81[8] km/s
Age0.60[9] Gyr
Other designations
50 Per, BD+37° 882, FK5 2297, GJ 9145, HD 25998, HIP 19335, V582 Persei, HR 1278, SAO 57006.[10]
Database references
SIMBADdata

50 Persei is a star in the constellation Perseus. Its apparent magnitude is 5.52,[3] which is bright enough to be seen with the naked eye. Located around 21.00 parsecs (68.5 ly) distant, it is a White main-sequence star of spectral type F7V,[4] a star that is currently fusing its core hydrogen. In 1998 the star was named a candidate Gamma Doradus variable with a period of 3.05 days,[6] which would means it displays variations in luminosity due to non-radial pulsations in the photosphere. Subsequently, it was classified as a RS Canum Venaticorum and BY Draconis variable by an automated program.[11]

This is probably a binary system with an unseen companion. It is physically associated with the likely binary system HIP 19255, with the two pairs orbiting each other over a time scale of around a million years. The components of HIP 19255 have an angular separation of 3.87″ and the two components orbit each other every 590 years. 50 Persei may share a gravitational association with Capella, even though the two are separated by nearly 15° − equivalent to a distance of 19 ly (5.9 pc).[12]

50 Persei is emitting an infrared excess at a wavelength of 70 μm, suggesting the presence of a circumstellar debris disk. The disk has a temperature of 96±5 K.[9]

  1. ^ Cite error: The named reference HIPCurve was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference aaa521_A12 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference paas21_2_129 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Aerts1998 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference aaas141_491 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference MartínezArnáiz2010 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Beichman2006 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Dubath 2011 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Shaya2011 was invoked but never defined (see the help page).