Mu2 Cancri

For other stars with this Bayer designation, see μ Cancri.
Mu2 Cancri
Location of μ2 Cancri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 08h 07m 45.85581s[1]
Declination +21° 34′ 54.5325″[1]
Apparent magnitude (V) +5.30[2]
Characteristics
Evolutionary stage Subgiant[3]
Spectral type G2 IV[4]
U−B color index +0.21[2]
B−V color index +0.63[2]
Astrometry
Radial velocity (Rv)−36.0±0.1[5] km/s
Proper motion (μ) RA: +23.610[1] mas/yr
Dec.: −68.122[1] mas/yr
Parallax (π)42.3605 ± 0.1251 mas[1]
Distance77.0 ± 0.2 ly
(23.61 ± 0.07 pc)
Absolute magnitude (MV)+3.46[6]
Details
Mass1.192+0.017
−0.016[7] M☉
Radius1.82[8] R☉
Luminosity3.782±0.015[1] L☉
Surface gravity (log g)3.97±0.02[7] cgs
Temperature5,809±59[7] K
Metallicity [Fe/H]0.11[7] dex
Rotational velocity (v sin i)3.7±0.3[6] km/s
Age5.64+0.35
−0.14[7] Gyr
Other designations
μ Cnc, 10 Cancri, BD+22°1862, FK5 2630, HD 67228, HIP 39780, HR 3176, SAO 79959[9]
Database references
SIMBADdata

Mu2 Cancri is a solitary,[10] yellow-hued star in the zodiac constellation of Cancer. It is visible to the naked eye with an apparent visual magnitude of +5.30.[2] Based upon an annual parallax shift of 42.36 mas as seen from Earth,[1] this star is located 77 light-years from the Sun. It is drifting closer with a radial velocity of −36 km/s[5] and will make its closest approach in about 611,100 years when it passes at a distance of 16.8 light-years (5.2 parsecs).[11]

At the estimated age of 5.6 billion years,[7] Mu2 Cancri is an evolving G-type subgiant star[3] with a stellar classification of G2 IV.[4] It has 1.2[7] times the mass of the Sun and 1.8[8] times the Sun's radius. Mu2 Cancri has relatively high metallicity—what astronomers term the abundance of elements other than hydrogen and helium—having a 29% higher abundance compared to the Sun.[7] It is radiating 3.78[1] times the Sun's luminosity at an effective temperature of 5,809 K.[7] The star is spinning at a leisurely projected rotational velocity of 3.7 km/s.[6]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 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 Cite error: The named reference Abt2019 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference AmmlerVonEiff2012 was invoked but never defined (see the help page).
  7. ^ a b c d e f g h i Cite error: The named reference Ramirez2013 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Takeda2007 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Bailer_et_al_2018 was invoked but never defined (see the help page).