Xi Cancri

Xi Cancri
Location of Nahn (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 09h 09m 21.53325s[1]
Declination +22° 02′ 43.6053″[1]
Apparent magnitude (V) +5.15[2] (5.70 + 6.20)[3]
Characteristics
Spectral type G9 III Fe-1 CH-0.5[4]
U−B color index +0.75[2]
B−V color index +0.96[2]
Astrometry
Radial velocity (Rv)+7.7±0.3[5] km/s
Proper motion (μ) RA: −1.00[1] mas/yr
Dec.: −0.52[1] mas/yr
Parallax (π)8.74 ± 0.49 mas[1]
Distance370 ± 20 ly
(114 ± 6 pc)
Absolute magnitude (MV)−0.12[4]
Orbit[6][7]
Period (P)1,700.76 d
Semi-major axis (a)0.0105±0.0017[3]″
Eccentricity (e)0.06
Periastron epoch (T)2,428,876.86 ± 10.0 JD
Argument of periastron (ω)
(secondary)		301.1°
Semi-amplitude (K1)
(primary)		4.4 km/s
Details
Luminosity118[8] L☉
Temperature5,101[8] K
Other designations
Nahn, ξ Cnc, 77 Cancri, BD+22° 2061, FK5 1239, HD 78515, HIP 44946, HR 3627, SAO 80666[9]
Database references
SIMBADdata

Xi Cancri (ξ Cancri, abbreviated Xi Cnc, ξ Cnc) is a spectroscopic binary star system in the zodiac constellation of Cancer. It is visible to the naked eye with an apparent visual magnitude of +5.15.[2] Based upon parallax measurements obtained during the Hipparcos mission,[1] it is roughly 370 light-years distant from the Sun.

The two components are designated Xi Cancri A (formally named Nahn /ˈnɑːn/)[10] and B.

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Sturch1972 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Malkov2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Pourbaix2004 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Jackson1957 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Mcdonald2012 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. ^ "Naming Stars". IAU.org. Retrieved 18 June 2018.