3 Puppis

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3 Puppis

3 Puppis
Observation data
Epoch J2000      Equinox J2000
Constellation Puppis
Right ascension 07h 43m 48.46872s [1]
Declination −28° 57′ 17.3720″ [1]
Apparent magnitude (V) 3.93[1]
Characteristics
Spectral type A3Iab [1]
Apparent magnitude (U) 4.06
Apparent magnitude (B) 4.09
Apparent magnitude (J) 3.550 ± 0.308
Apparent magnitude (H) 3.156 ± 0.224
Apparent magnitude (K) 2.463 ± 0.292
B−V color index 0.16
Astrometry
Radial velocity (Rv) 25.4±0.9 km/s
Proper motion (μ) RA: -5.09±0.11 mas/yr
Dec.: 3.90±0.15 mas/yr
Parallax (π) 0.59 ± 0.17 mas
Distance 2280±490[2] ly
(700±150[2] pc)
Absolute magnitude (MV) -5.3[2]
Details
Mass 8-15[2] M
Radius 55±10[2] R
Luminosity L
Surface gravity (log g) 2.0[2] cgs
Temperature 8,500[2] K
Other designations
GSC 06552-03228, HD 62623, HIP 37677, HR 2996, SAO 174400
Database references
SIMBAD data

3 Puppis (3 Pup) is a binary star system[3] in the constellation Puppis. Its apparent magnitude is 3.93. It is a white supergiant with a spectral class of A3Iab. It is surrounded by a cloud of circumstellar dust, which is unusual for an A-type star, suggesting that it may actually be a low-mass star transitioning from an asymptotic giant branch phase to a planetary nebula.[3]

References[edit]

  1. ^ a b c d SIMBAD, l Puppis (accessed 24 January 2013)
  2. ^ a b c d e f g Rovero, Adrián C.; Ringuelet, Adela E. (21 July 1993). "3 Puppis - A peculiar object with infrared excess". Monthly Notices of the Royal Astronomical Society 266: 204–205. doi:10.1093/mnras/266.1.203. Retrieved 26 Jan 2013. 
  3. ^ a b Plets, H.; Waelkens, C.; Trams, N. R. (1995). "The peculiar binary supergiant 3 Puppis". Astronomy and Astrophysics, v.293. The Smithsonian/NASA Astrophysics Data System. pp. 363–370. Retrieved 26 Jan 2013.