HR 8323

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HR 8323
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Grus
Right ascension 21h 48m 15.7514s[1]
Declination −47° 18′ 13.014″[1]
Apparent magnitude (V)5.58[1]
Characteristics
Spectral typeG2V[1]
U−B color index+0.08[2]
B−V color index+0.60[2]
Astrometry
Radial velocity (Rv)−7.6 ± 0.2[1] km/s
Proper motion (μ) RA: 165.64[1] mas/yr
Dec.: −295.00[1] mas/yr
Parallax (π)63.95 ± 0.78[1] mas
Distance51.0 ± 0.6 ly
(15.6 ± 0.2 pc)
Absolute magnitude (MV)4.61[3]
Details
Mass0.97 (0.92 to 1.04)[4] M☉
Radius1.0[5] R☉
Temperature5900[4] K
Metallicity [Fe/H]−0.15[4] dex
Rotational velocity (v sin i)2[4] km/s
Age3.8 (1.3 to 7.4)[4] Gyr
Other designations
CCDM J21483-4718A, CD−47 13928, CPD−47 9758, FK5 1573, GC 30516, Gliese 838, GJ 838, HD 207129, HIP 107649, IDS 21418-4746 A, LTT 8704, NLTT 52100, PPM 327579, SAO 230846, WDS J21483-4718A.[1]
Database references
SIMBADdata

HR 8323 is a G-type pre-main-sequence star in the constellation of Grus.[1] It has an apparent visual magnitude of approximately 5.58.[1] This is a Sun-like star with the same stellar classification G2V and a similar mass. It is roughly the same age as the Sun, but has a lower abundance of elements other than hydrogen and helium; what astronomers term the star's metallicity.[4]

A debris disk has been imaged around this star in visible light using the ACS instrument on the Hubble Space Telescope; it has also been imaged in the infrared (70 μm) using the MIPS instrument on the Spitzer Space Telescope. Based on the ACS image, the disk appears to have a radius of about 163 astronomical units and to be about 30 AU wide, and to be inclined at 60° to the plane of the sky.[6]

Another star, CCDM J21483-4718B (also designated CD−47 13929 or WDS J21483-4718B), of apparent visual magnitude 8.7, has been observed 55 arcseconds away from this star,[7] but based on comparison of proper motions, it is believed to be an optical double and not physically related to its companion.[8]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 HD 207129 -- Pre-main sequence Star, database entry, SIMBAD. Accessed on line February 9, 2011.
  2. ↑ 2.0 2.1 HR 8323, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line February 9, 2011.
  3. ↑ From apparent magnitude and parallax.
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 HD 207129, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line February 9, 2011.
  5. ↑ HD 207129, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line February 9, 2011.
  6. ↑ HST and Spitzer Observations of the HD 207129 Debris Ring, John E. Krist et al., The Astronomical Journal 140, #4 (October 2010), pp. 1051-1061, doi:10.1088/0004-6256/140/4/1051, Bibcode: 2010AJ....140.1051K.
  7. ↑ CCDM J21483-4718, database entry, CCDM (Catalog of Components of Double & Multiple stars), J. Dommanget and O. Nys, second edition, 2002, VizieR database I/274.
  8. ↑ Notes, WDS 21483-4718, The Washington Double Star Catalog, B. D. Mason et al., version 2011-02-06, VizieR database B/wds.
Stars of Grus
Bayer
Variable
  • U
  • W
  • RS
  • RZ
  • BC
  • BP
  • BZ
  • CE
  • DL
  • DQ
HR
  • 8236
  • 8241
  • 8299
  • 8323
  • 8366
  • 8379
  • 8440
  • 8477
  • 8484
  • 8501
  • 8635
  • 8639
  • 8657
  • 8658
  • 8659
  • 8685
  • 8713
  • 8749
  • 8760
  • 8771
  • 8791
  • 8793
  • 8814
  • 8835
  • 8846
  • 8847
  • 8877
  • 8896
  • 8898
HD
Gliese
Other
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