Upsilon2 Cancri

For other stars with this Bayer designation, see υ Cancri.
Upsilon2 Cancri
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 08h 33m 00.10385s[1]
Declination +24° 05′ 05.2560″[1]
Apparent magnitude (V) +6.35[2]
Characteristics
Spectral type G9 III[3]
U−B color index +0.88[2]
B−V color index +1.02[2]
Astrometry
Radial velocity (Rv)+73.7±0.5[4] km/s
Proper motion (μ) RA: −63.80[1] mas/yr
Dec.: −46.40[1] mas/yr
Parallax (π)5.1325 ± 0.0407 mas[5]
Distance635 ± 5 ly
(195 ± 2 pc)
Absolute magnitude (MV)+1.13[3]
Details
Radius15.43[5] R☉
Luminosity120[5] L☉
Surface gravity (log g)2.43±0.11[6] cgs
Temperature4881±44[6] K
Metallicity [Fe/H]0.00±0.05[6] dex
Rotational velocity (v sin i)2.7[7] km/s
Other designations
υ2 Cnc, 32 Cancri, BD+24°1946, HD 72324, HIP 41940, HR 3369, SAO 80245[8]
Database references
SIMBADdata

Upsilon2 Cancri (υ2 Cancri) is a faint, yellow-hued star in the zodiac constellation of Cancer. It is near the lower brightness limit of stars that can be viewed with the naked eye, having an apparent visual magnitude of +6.35.[2] Based upon an annual parallax shift of 5.1325 mas as seen from our orbit,[1] this system is roughly 635 light-years away.

This is an evolved G-type giant star with a stellar classification of G9 III.[3] It is radiating 98[9] times the Sun's luminosity from its photosphere at an effective temperature of 4,881 K.[6] Upsilon2 Cancri is a member of the Epsilon Indi Moving Group of stars that share a common motion through space.[3]

  1. ^ a b c d e 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 Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Eggen1958 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 c Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  6. ^ a b c d Cite error: The named reference Prugniel2011 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference DeMedeiros2000 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 Mcdonald2012 was invoked but never defined (see the help page).