Astronomy:1 Puppis

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Short description: Star in the constellation Puppis
1 Puppis
Puppis constellation map.svg
Red circle.svg
Location of 1 Puppis (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Puppis
Right ascension  07h 43m 32.38668s[1]
Declination −28° 24′ 39.1887″[1]
Apparent magnitude (V) 4.59[2]
Characteristics
Spectral type M1III[3]
U−B color index +1.94[2]
B−V color index +1.63[2]
Astrometry
Radial velocity (Rv)+32.40[4] km/s
Proper motion (μ) RA: −13.782[1] mas/yr
Dec.: +29.646[1] mas/yr
Parallax (π)4.1384 ± 0.1143[1] mas
Distance790 ± 20 ly
(242 ± 7 pc)
Absolute magnitude (MV)−2.24[5]
Details
Radius84[6] R☉
Luminosity1,585 - 1,644[6] L☉
Surface gravity (log g)0.32[7] cgs
Temperature3,986±170[6] K
Metallicity [Fe/H]−0.19[7] dex
Rotational velocity (v sin i)1.0[8] km/s
Other designations
1 Pup, NSV 3708, CD−28°4767, GC 10409, HD 62576, HIP 37648, HR 2993, SAO 174391, CCDM J07435-2825A, WDS J07435-2825A, GSC 06552-03227[9]
Database references
SIMBADdata

1 Puppis is a single[10] star in the southern constellation of Puppis. It lies in the northern part of the constellation at a distance of about 790 ly, east of Aludra in Canis Major and just north of the white supergiant, 3 Puppis. This object is visible to the naked eye as a faint, red-hued star with an apparent visual magnitude of 4.59. It is moving further from the Earth with a heliocentric radial velocity of +32.4 km/s.

A light curve for 1 Puppis, plotted from Hipparcos data

The Hipparcos data for 1 Puppis shows low amplitude (0.007 magnitude) variability with a period of 1.8094 days.[11] The International Variable Star Index classifies the 1 Puppis as a star with starspots that cause the brightness to change as it rotates, and which varies in visual magnitude from 4.58 to 4.63.[12]

This is a red giant star with a stellar classification of M1 III,[3] having exhausted the hydrogen at its core and evolved away from the main sequence. The star is radiating 1,509 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,111 K.[7] It has several visual companions: component B, of magnitude 13.7 and angular separation of 26″, C, of magnitude 9.21 and separation 78.8″, and D, of magnitude 10.84 and separation from C of 1.3″.[13] Component B is a background object.[14] Components C and D form the binary star HD 62557 and have a similar parallax and proper motion to 1 Puppis.[15][16]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode: 2002yCat.2237....0D. 
  3. ↑ 3.0 3.1 Abt, Helmut A. (2008). "Visual Multiples. IX. MK Spectral Types". The Astrophysical Journal Supplement Series 176 (1): 216–217. doi:10.1086/525529. Bibcode: 2008ApJS..176..216A. 
  4. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G. 
  5. ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.  Vizier catalog entry
  6. ↑ 6.0 6.1 6.2 Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal 158 (1): 20. doi:10.3847/1538-3881/ab1cbd. Bibcode: 2019AJ....158...20M. 
  7. ↑ 7.0 7.1 7.2 Earle Luck, R. (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal 147 (6): 137. doi:10.1088/0004-6256/147/6/137. Bibcode: 2014AJ....147..137L. 
  8. ↑ Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G 3244. Bibcode: 2005yCat.3244....0G.  Vizier catalog entry
  9. ↑ "1 Pup". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=1+Pup. 
  10. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E. 
  11. ↑ Koen, Chris; Eyer, Laurent (March 2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society 331 (1): 45–59. doi:10.1046/j.1365-8711.2002.05150.x. Bibcode: 2002MNRAS.331...45K. 
  12. ↑ "NSV 3708". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=42332. 
  13. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M.  Vizier catalog entry
  14. ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  15. ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  16. ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.



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