50 Cancri

This article is about A2 Cancri. For other stars with this Bayer designation, see A Cancri.
50 Cancri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension 08h 46m 56.01919s[1]
Declination +12° 06′ 35.8305″[1]
Apparent magnitude (V) 5.89[2]
Characteristics
Evolutionary stage main sequence
Spectral type A1 Vp[3]
B−V color index 0.120±0.005[2]
Variable type None[4]
Astrometry
Radial velocity (Rv)23.3±2.9[2] km/s
Proper motion (μ) RA: −63.773[1] mas/yr
Dec.: −50.694[1] mas/yr
Parallax (π)17.7961 ± 0.0792 mas[1]
Distance183.3 ± 0.8 ly
(56.2 ± 0.3 pc)
Absolute magnitude (MV)+1.82±0.01[4]
Details
Mass2.1[5] M☉
Luminosity10.8±0.21[5] L☉
Surface gravity (log g)4.40[6] cgs
Temperature8,340±48[5] K
Rotational velocity (v sin i)18[7] km/s
Age264[6] Myr
Other designations
A2 Cancri, 50 Cnc, BD+12°1904, HD 74873, HIP 43121, HR 3481, SAO 98117[8]
Database references
SIMBADdata

50 Cancri is a single[9] star in the zodiac constellation of Cancer, located 183 light years away from the Sun.[1] It has the Bayer designation A2 Cancri; 50 Cancri is the Flamsteed designation. It is faintly visible to the naked eye as a white-hued star with an apparent visual magnitude of 5.89.[2] The star is moving away from the Earth with a heliocentric radial velocity of 23 km/s, having come to within 118 light-years some 1.2 million years ago.[2]

This is a chemically peculiar A-type main-sequence star with a stellar classification of A1 Vp.[3] It is a Lambda Boötis star displaying strongly-depleted iron peak and alpha process elements, but otherwise relatively normal solar abundances.[5] The star shows no variability down to a detection limit of 1.6 millimagnitudes.[10] It is 264[6] million years old with a relatively low projected rotational velocity of 18 km/s.[7] 50 Cancri has 2.1[5] times the mass of the Sun and is radiating 11[5] times the Sun's luminosity from its photosphere at an effective temperature of 8,340 K.[5]

50 Cancri has an infrared excess, which most likely indicates a debris disk in orbit around the host star. A blackbody model of the emission shows a two component fit, with the warm section having a temperature of 246±91 K at a radius of 4±3 AU from the star, and a cool component at 108±21 K with a separation of 22±8 AU.[5]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference abt1995 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Paunzen2002 was invoked but never defined (see the help page).
  5. ^ a b c d e f g h Cite error: The named reference Draper2016 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference zorec2012 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 vast2014 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Paunzen2002b was invoked but never defined (see the help page).