R Puppis

Not to be confused with Rho Puppis.
R Puppis
Location of R Puppis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Puppis
Right ascension 07h 40m 52.597s[1]
Declination −31° 39′ 40.20″[1]
Apparent magnitude (V) 6.50 - 6.71[2]
Characteristics
Spectral type G2 0-Ia[3]
U−B color index +0.85[4]
B−V color index +1.18[4]
Variable type SRd[2]
Astrometry
Radial velocity (Rv)+68.22[1] km/s
Proper motion (μ) RA: −2.251[1] mas/yr
Dec.: +3.222[1] mas/yr
Parallax (π)0.2440 ± 0.0180 mas[1]
Distance13,400 ± 1,000 ly
(4,100 ± 300 pc)
Absolute magnitude (MV)−7.8[5]
Details
Mass14.3[6] M☉
Radius477+28
−22[7] R☉
Luminosity96,600±26,100[7] L☉
Surface gravity (log g)0.30[8] cgs
Temperature5,495; (4,100±68 – 6,500)[8] K
Metallicity [Fe/H]−0.25[8] dex
Other designations
CD−31°4910, GSC 07106-03582, HIP 37415, HR 2974, HD 62058
Database references
SIMBADdata
NGC 2439, with R Puppis the brightest star

R Puppis is a variable star in the constellation Puppis. It is a rare yellow hypergiant and a candidate member of the open cluster NGC 2439. It is also an MK spectral standard for the class G2 0-Ia.[9]

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  2. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference perkins was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference ducati2002 was invoked but never defined (see the help page).
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  7. ^ a b Cite error: The named reference dr2 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference usenko2011 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference garcia1989 was invoked but never defined (see the help page).