53 Cancri

53 Cancri

A light curve for BO Cancri, plotted from Hipparcos data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension 08h 52m 28.58850s[2]
Declination +28° 15′ 32.9851″[2]
Apparent magnitude (V) 5.9 - 6.4[3]
Characteristics
Evolutionary stage red giant
Spectral type M3 III[4]
B−V color index 1.552±0.010[4]
Variable type SRb[3]
Astrometry
Radial velocity (Rv)+13.82±0.29[4] km/s
Proper motion (μ) RA: −15.212[2] mas/yr
Dec.: −7.961[2] mas/yr
Parallax (π)3.4133 ± 0.1685 mas[2]
Distance960 ± 50 ly
(290 ± 10 pc)
Details
Radius87[2] R☉
Luminosity1,175[2] L☉
Temperature3,622[2] K
Other designations
53 Cnc, BO Cancri, BD+28°1659, HD 75716, HIP 43575, HR 3521, SAO 80476[5]
Database references
SIMBADdata

53 Cancri is a variable star in the zodiac constellation Cancer, located around 960 light years from the Sun. It has the variable star designation BO Cancri; 53 Cancri is the Flamsteed designation. This object is a challenge to view with the naked eye, having an apparent visual magnitude around 6. It is around 960 light years away.

The star is moving further away from the Earth with a heliocentric radial velocity of +14 km/s.[4] 53 Cancri is an aging red giant on the asymptotic giant branch[6] and has a stellar classification of M3 III.[4] It has expanded to 87 times the radius of the Sun, and its bolometric luminosity is over a thousand times higher than the Sun's at an effective temperature of 3,622 K.[2]

53 Cancri is a semiregular variable that varies between magnitude 5.9 and 6.4 with a period of 27 days.[3] There is a suspected second period of 270 days.[7]

  1. ^ Cite error: The named reference CDS was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference gcvs was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference lebzelter was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference glass2007 was invoked but never defined (see the help page).