Nu Cancri

Nu Cancri
Location of ν Cancri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 09h 02m 44.26543s[1]
Declination +24° 27′ 10.4902″[1]
Apparent magnitude (V) +5.46[2]
Characteristics
Spectral type A0 III[3]
U−B color index −0.10[2]
B−V color index −0.03[2]
Astrometry
Radial velocity (Rv)−15.6±0.7[4] km/s
Proper motion (μ) RA: −2.48[1] mas/yr
Dec.: −7.67[1] mas/yr
Parallax (π)8.31 ± 0.35 mas[1]
Distance390 ± 20 ly
(120 ± 5 pc)
Absolute magnitude (MV)+0.05[5]
Orbit[6]
Period (P)1401.4 d
Eccentricity (e)0.35
Periastron epoch (T)2419687 Julian day
Argument of periastron (ω)
(secondary)		264°
Semi-amplitude (K1)
(primary)		7.7 km/s
Details
ν Cnc A
Mass2.82±0.13[7] M☉
Luminosity93[7] L☉
Temperature10,250[7] K
Metallicity [Fe/H]−0.20±0.04[5] dex
Rotational velocity (v sin i)18.9±0.4[7] km/s
Other designations
ν Cnc, 69 Cancri, BD+25° 2029, FK5 2714, HD 77350, HIP 44405, HR 3595, SAO 80595[8]
Database references
SIMBADdata

Nu Cancri, Latinised from ν Cancri, is a binary star[6] in the zodiac constellation of Cancer. It is faintly visible to the naked eye with an apparent visual magnitude of +5.46.[2] Based upon an annual parallax shift of 8.31 mas as seen from the Earth,[1] the star is located roughly 390 light-years from the Sun.

This is a single-lined spectroscopic binary system with an orbital period of 3.8 years and an eccentricity of 0.35. The primary, component A, is a white-hued A-type giant star with a stellar classification of A0 III.[3] It is a magnetic Ap star with a field strength of 846×10−4 T, showing abundance peculiarities in strontium, chromium and mercury.[7] The star has 2.8 times the mass of the Sun and is radiating 93 times the Sun's luminosity from its photosphere at an effective temperature of 10,250 K.[7]

  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 Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Pourbaix2004 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference Wraight2012 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).