HR 3384

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HR 3384
Observation data
Epoch J2000      Equinox J2000
Constellation Pyxis
Right ascension 08h 32m 51.49609s[1]
Declination –31° 30′ 03.0717″[1]
Apparent magnitude (V) 6.38[2]
Characteristics
Spectral type G9V[3]
U−B color index +0.29[4]
B−V color index +0.78[4]
Astrometry
Radial velocity (Rv) +81.91[5] km/s
Proper motion (μ) RA: –1113.37[1] mas/yr
Dec.: 761.57[1] mas/yr
Parallax (π) 81.91 ± 0.46[1] mas
Distance 39.8 ± 0.2 ly
(12.21 ± 0.07 pc)
Absolute magnitude (MV) 5.95[2]
Details
Mass 0.750 ± 0.015[6] M
Surface gravity (log g) 4.56[7] cgs
Temperature 5,290[7] K
Metallicity [Fe/H] −0.36[7] dex
Rotational velocity (v sin i) 6.79[8] km/s
Age (5.7–6.5) × 109[2] years
Other designations
11 G. Pyxidis, CD-31°6229, GJ 309, HD 72673, HIP 41926, HR 3384, LHS 249, LTT 3168, SAO 199352.

HR 3384 (11 G. Pyxidis) is a main sequence star of spectral class G9V, located 39.8 light-years (12.21 parsecs) from Earth.

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 Vizier catalog entry
  2. ^ a b c Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008), "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics", The Astrophysical Journal 687 (2): 1264–1293, arXiv:0807.1686, Bibcode:2008ApJ...687.1264M, doi:10.1086/591785 
  3. ^ Gray, R. O. et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637 
  4. ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data (SIMBAD), Bibcode:1986EgUBV........0M 
  5. ^ Nidever, David L. et al. (August 2002), "Radial Velocities for 889 Late-Type Stars", The Astrophysical Journal Supplement Series 141 (2): 503–522, arXiv:astro-ph/0112477, Bibcode:2002ApJS..141..503N, doi:10.1086/340570 
  6. ^ Tsantaki, M. et al. (July 2013), "Deriving precise parameters for cool solar-type stars. Optimizing the iron line list", Astronomy & Astrophysics 555: A150, arXiv:1304.6639, Bibcode:2013A&A...555A.150T, doi:10.1051/0004-6361/201321103. 
  7. ^ a b c Ramírez, I. et al. (February 2013), "Oxygen abundances in nearby FGK stars and the galactic chemical evolution of the local disk and halo", The Astrophysical Journal 764 (1): 78, arXiv:1301.1582, Bibcode:2013ApJ...764...78R, doi:10.1088/0004-637X/764/1/78 
  8. ^ Martínez-Arnáiz, R. et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter", Astronomy and Astrophysics 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725 

External links[edit]