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Chi Cancri information


Chi Cancri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension 08h 20m 03.86070s[1]
Declination +27° 13′ 03.7464″[1]
Apparent magnitude (V) 5.14[2]
Characteristics
Evolutionary stage main sequence
Spectral type F6V[3]
U−B color index –0.06[2]
B−V color index +0.47[2]
Astrometry
Radial velocity (Rv)+32.91±0.08[4] km/s
Proper motion (μ) RA: –17.433[1] mas/yr
Dec.: –377.614[1] mas/yr
Parallax (π)54.8640 ± 0.1728 mas[1]
Distance59.4 ± 0.2 ly
(18.23 ± 0.06 pc)
Absolute magnitude (MV)3.85[5]
Details[3]
Mass1.070 M
Radius1.3870±0.0276 R
Luminosity2.4378±0.0341 L
Surface gravity (log g)4.35[5] cgs
Temperature6,130±58 K
Metallicity [Fe/H]−0.26 dex
Rotational velocity (v sin i)4.2[5] km/s
Age5.8 Gyr
Other designations
χ Cnc, 18 Cancri, BD+27°1589, FK5 1217, GJ 303, HD 69897, HIP 40843, HR 3262, SAO 80104[6]
Database references
SIMBADdata

Chi Cancri, Latinized from χ Cancri, is a candidate astrometric binary[7] star system in the northern zodiac constellation of Cancer. It has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.14.[2] The system is located at a distance of 59 light years from the Sun, based on parallax, and is drifting further away with a radial velocity of +33 km/s.[4] It is estimated to have made its closest approach some 274,000 years ago when it came to within 42 light-years.[8]

The visible component of this system is an F-type main-sequence star with a stellar classification of F6V,[3] where the luminosity class of 'V' indicates it is generating energy through core hydrogen fusion. The star is 5.8[3] billion years old and is spinning with a projected rotational velocity of just 4.2 km/s.[5] It has about the same mass as the Sun but 1.4 times the Sun's radius. Chi Cancri is radiating 2.4 times the luminosity of the Sun from its photosphere at an effective temperature of 6,130 K.[3] It displays an infrared excess in the 18μm wavelength band, suggesting a circumstellar disk of dusty debris is orbiting the star.[9]

  1. ^ a b c d e 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 clpl4 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Boyajian2013 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference apjss141 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Paunzen2014 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Ishihara2017 was invoked but never defined (see the help page).

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