11 Aquarii

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11 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 00m 33.84082s[1]
Declination –04° 43′ 48.9421″[1]
Apparent magnitude (V) 6.216[2]
Characteristics
Spectral type G1 V[3]
U−B color index +0.22[4]
B−V color index +0.63[4]
Astrometry
Radial velocity (Rv) -17.8 ± 2[2] km/s
Proper motion (μ) RA: 48.78[1] mas/yr
Dec.: –138.84[1] mas/yr
Parallax (π) 37.80 ± 1.01[1] mas
Distance 86 ± 2 ly
(26.5 ± 0.7 pc)
Absolute magnitude (MV) 4.10[2]
Details
Mass 1.12+0.03
−0.09
[2] M
Radius 1.30[5] R
Surface gravity (log g) 4.39[6] cgs
Temperature 5,973[6] K
Metallicity [Fe/H] 0.11[2]–0.28[6] dex
Rotational velocity (v sin i) 5[7] km/s
Age 4.7[2] Gyr
Other designations
11 Aquarii, HD 199960, HR 8041, SAO 145022, HIP 103682, BD -05 5433, HIC 103682
Database references
SIMBAD data

11 Aquarii is a sunlike star (G1V) in the constellation Aquarius with an apparent magnitude is 6.22. It is approximately 86 ly from Earth and is a main-sequence star of spectral type G1 and luminosity class V. Compared to the Sun, this star has a higher abundance of elements more massive than helium. This indicates it belongs to a class of stars called metal-rich. The star is about the same age as the Sun, but it has slightly more mass and has a larger radius.[2][5]

References[edit]

  1. ^ a b c d e van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752v1, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357  Note: see VizieR catalogue I/311.
  2. ^ a b c d e f g Nordström, B. et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs", Astronomy and Astrophysics 418: 989–1019, arXiv:astro-ph/0405198, Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959 
  3. ^ Buscombe, W. (1962), "Spectral classification of Southern fundamental stars", Mount Stromlo Observatory Mimeogram 4, Bibcode:1962MtSOM...4....1B 
  4. ^ a b Cousins, A. W. J. (1964), "Photometric Data for Stars in the Equatorial Zone (Seventh List)", Monthly Notes of the Astronomical Society of Southern Africa 23: 175, Bibcode:1964MNSSA..23..175C 
  5. ^ a b Takeda, Genya et al. (February 2007), "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog", The Astrophysical Journal Supplement Series 168 (2): 297–318, arXiv:astro-ph/0607235, Bibcode:2007ApJS..168..297T, doi:10.1086/509763 
  6. ^ a b c Sousa, S. G. et al. (August 2007), "Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes", Astronomy and Astrophysics 487 (1): 373–381, arXiv:0805.4826, Bibcode:2008A&A...487..373S, doi:10.1051/0004-6361:200809698 
  7. ^ Takeda, Yoichi et al. (February 2005), "High-Dispersion Spectra Collection of Nearby F--K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards", Publications of the Astronomical Society of Japan 57 (1): 13–25, Bibcode:2005PASJ...57...13T, doi:10.1093/pasj/57.1.13 

External links[edit]