Phi1 Cancri

For other stars with this Bayer designation, see φ Cancri.
Phi1 Cancri
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 08h 26m 27.70615s[1]
Declination +27° 53′ 36.8867″[1]
Apparent magnitude (V) +5.57[2]
Characteristics
Spectral type K5 III[3]
U−B color index +1.68[2]
B−V color index +1.40[2]
Astrometry
Radial velocity (Rv)+25.25±0.19[4] km/s
Proper motion (μ) RA: −33.28[1] mas/yr
Dec.: −116.17[1] mas/yr
Parallax (π)8.74 ± 0.40 mas[1]
Distance370 ± 20 ly
(114 ± 5 pc)
Absolute magnitude (MV)+0.29[5]
Details
Radius17[6] R☉
Luminosity121[7] L☉
Temperature4,138[7] K
Metallicity [Fe/H]−0.134±0.093[8] dex
Rotational velocity (v sin i)1.3[9] km/s
Other designations
φ1 Cnc, 22 Cancri, BD+28° 1602, FK5 2656, HD 71093, HIP 41377, HR 3304, SAO 80181[10]
Database references
SIMBADdata

Phi1 Cancri, Latinised from φ1 Cancri, is a solitary,[3] orange-hued star in the constellation Cancer. It is faintly visible to the naked eye with an apparent visual magnitude of +5.57.[2] Based upon an annual parallax shift of 8.74 mas,[1] it is approximately 370 light-years from the Sun.

This is an evolved K-type giant star with a stellar classification of K5 III.[3] The measured angular diameter of this star, after correction for limb darkening, is 1.87±0.02 mas.[11] At the estimated distance of Phi1 Cancri, this yields a physical size of about 17 times the radius of the Sun.[6] It is radiating 121 times the Sun's luminosity from its photosphere at an effective temperature of 4,138 K.[7]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 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 c Cite error: The named reference Eggleton2008 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. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Cousins1966 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Taylor1999 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference DeMedeiros2000 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 Richichi2005 was invoked but never defined (see the help page).