NU Pavonis

Not to be confused with Nu (𝜈) Pavonis.
NU Pavonis

A visual band light curve for NU Pavonis, plotted from data published by Tabur et al. (2009)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Pavo
Right ascension 20h 01m 44.74682s[2]
Declination −59° 22′ 33.1864″[2]
Apparent magnitude (V) 4.95[3]
Characteristics
Spectral type M6 III[4]
B−V color index 1.356±0.011[3]
Variable type SRb[5]
Astrometry
Radial velocity (Rv)−10.3±2.8[6] km/s
Proper motion (ÎŒ) RA: +20.385[2] mas/yr
Dec.: âˆ’26.769[2] mas/yr
Parallax (π)7.0208 Â± 0.4464 mas[2]
Distance460 ± 30 ly
(142 ± 9 pc)
Absolute magnitude (MV)−0.86[3]
Details
Radius204±29[7] R☉
Luminosity7,412[3] L☉
Surface gravity (log g)0.87[8] cgs
Temperature3,516±275[7] K
Other designations
NU Pav, CD−59° 7361, FK5 3598, HD 189124, HIP 98608, HR 7625, SAO 246389[9]
Database references
SIMBADdata

NU Pavonis (N-U, not "nu") is a variable star in the southern constellation of Pavo. With a nominal apparent visual magnitude of 4.95,[3] it is a faint star but visible to the naked eye. The distance to NU Pav, as determined from its annual parallax shift of 7.0 mas[2] as seen from Earth's orbit, is around 460 light years. It is moving closer with a heliocentric radial velocity of −10 km/s.[6]

This is an aging red giant with a stellar classification of M6 III,[4] currently on the asymptotic giant branch. It is a semiregular variable star of sub-type SRb that ranges in magnitude from 4.91 down to 5.26 with a period of 60 days.[7] The star has expanded to 204[7] times the Sun's radius and is radiating 7,412[3] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,516 K.[7] Far-ultraviolet emission has been detected from these coordinates, which may be coming from a companion star.[8]

  1. ^ Cite error: The named reference Tabur2009 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference ArroyoTorres2014 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference ortiz2016 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).