82 Cancri

For other stars with this Bayer designation, see π Cancri.
82 Cancri
Location of 82 Cancri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 09h 15m 13.85196s[1]
Declination +14° 56′ 29.4401″[1]
Apparent magnitude (V) +5.33[2]
Characteristics
Spectral type K1 III[3]
U−B color index +1.31[2]
B−V color index +1.32[2]
Astrometry
Radial velocity (Rv)+27.49±0.19[4] km/s
Proper motion (μ) RA: −40.874[1] mas/yr
Dec.: −11.835[1] mas/yr
Parallax (π)6.0793 ± 0.1222 mas[1]
Distance540 ± 10 ly
(164 ± 3 pc)
Absolute magnitude (MV)−0.98[5]
Details
Mass2.56±0.13[6] M☉
Radius31.01+1.09
−3.52[1] R☉
Luminosity307.4±7.3[1] L☉
Temperature4,340+270
−74[1] K
Metallicity [Fe/H]−0.195±0.099[7] dex
Rotational velocity (v sin i)1.3±1.0[8] km/s
Other designations
π2 Cnc, 82 Cancri, BD+15° 2009, FK5 2733, HD 79554, HIP 45410, HR 3669, SAO 98456[9]
Database references
SIMBADdata

82 Cancri is a solitary,[3] orange-hued star in the zodiac constellation of Cancer. It has the Bayer designation Pi2 Cancri, which is Latinized from π2 Cancri; 82 Cancri is the star's Flamsteed designation. The star lies just a degree to the south of the ecliptic.[10] With an apparent visual magnitude of +5.33,[2] it is dimly visible to the naked eye on a dark night. This star is located at a distance of approximately 540 light years from the Sun based on parallax. At that range, the visual magnitude is diminished by an extinction of 0.10 magnitudes due to interstellar dust.[11] It is drifting further away with a radial velocity of +27 km/s.[4]

This is an evolved K-type giant star with a stellar classification of K1 III,[3] having exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. The star currently has 31[1] times the girth of the Sun and is spinning slowly with a projected rotational velocity. It is radiating over 300 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,340 K.[1] Based on its abundance of iron, the star has a lower abundances of heavier elements than the Sun.[7]

  1. ^ a b c d e f g h i j 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 Rybka1969 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. ^ a b 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. ^ Cite error: The named reference Kervella_et_al_2019 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Taylor1999 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference DeMedeiros2014 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 Sinnott_Perryman_1997 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).