Nu Chamaeleontis

Nu Chamaeleontis
Observation data
Epoch J2000      Equinox J2000
Constellation Chamaeleon
Right ascension 09h 46m 20.63010s[1]
Declination −76° 46′ 34.0259″[1]
Apparent magnitude (V) 5.43[2]
Characteristics
Spectral type G8III[3]
U−B color index +0.57[4]
B−V color index +0.89[4]
Astrometry
Radial velocity (Rv)11.18±0.14[5] km/s
Proper motion (μ) RA: +83.279[1] mas/yr
Dec.: −56.443[1] mas/yr
Parallax (π)17.2608 ± 0.0763 mas[1]
Distance189.0 ± 0.8 ly
(57.9 ± 0.3 pc)
Absolute magnitude (MV)1.59[2]
Details
Mass1.64±0.20[2] M☉
Radius6.50+0.08
−0.10[1] R☉
Luminosity23.9±0.1[1] L☉
Surface gravity (log g)+3.07±0.15[2] cgs
Temperature5008+39
−30[1] K
Rotational velocity (v sin i)1.2±1.0[5] km/s
Other designations
CPD−76°598, FK5 2784, HD 85396, HIP 47956, HR 3902, SAO 256658[6]
Database references
SIMBADdata

ν Chamaeleontis, Latinized as Nu Chamaeleontis, is a single[7] star in the southern circumpolar constellation of Chamaeleon. It is a yellow-hued star, dimly visible to the naked eye, with an apparent visual magnitude of 5.43.[2] This object is located at a distance of 189 light-years from the Sun, based on its parallax,[1] and is drifting further away with a radial velocity of +11 km/s.[5] It has an absolute magnitude of 1.59.[2]

This object is an aging G-type giant star with a stellar classification of G8III.[3] Having exhausted the supply of hydrogen at its core, it has expanded and cooled off the main sequence; at present it has 6.5[1] times the girth of the Sun. The star has 1.6[2] times the mass of the Sun and is radiating 24[1] times the Sun's luminosity from its swollen photosphere at an effective temperature of 5008 K.[1] These coordinates are a source for X-ray emission, which is most likely (99.3% chance) coming from the star.[8]

  1. ^ a b c d e f g h i j k l Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference AllendePrieto was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference deMedeiros 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 Haakonsen2009 was invoked but never defined (see the help page).