11 Sagittae
Location of 11 Sagittae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sagitta
Right ascension 19h 57m 45.44547s[1]
Declination +16° 47′ 20.9781″[1]
Apparent magnitude (V) 5.53[2]
Characteristics
Spectral type B9III[3]
Astrometry
Radial velocity (Rv)−26.10±1.6[4] km/s
Proper motion (μ) RA: 11.609[1] mas/yr
Dec.: 18.605[1] mas/yr
Parallax (π)7.5596 ± 0.0600 mas[1]
Distance431 ± 3 ly
(132 ± 1 pc)
Details
Mass2.47[2] M☉
Radius4.02[2] R☉
Luminosity127[2] L☉
Surface gravity (log g)3.62[2] cgs
Temperature9,661[2] K
Metallicity [Fe/H]0.0[5] dex
Rotational velocity (v sin i)34[6] km/s
Age242[5] Myr
Other designations
11 Sge, BD+16°4081, HD 189090, HIP 98324, HR 7622, SAO 105471[3]
Database references
SIMBADdata

11 Sagittae is a star in the constellation Sagitta. It is a blue giant with a spectral classification of B9III and has evolved off the main sequence. The star will enter the Hertzsprung gap soon.

Naming

It is in the Chinese asterism 左旗 (Zuǒ Qí), or Left Flag which consists of 11 Sagittae, γ Sagittae, α Sagittae, β Sagittae, δ Sagittae, ζ Sagittae, 13 Sagittae, 14 Sagittae and ρ Aquilae. Consequently, the Chinese name for γ Sagittae itself is 左旗七 (Zuǒ Qí qī, English: the Seventh Star of Left Flag).

References

  1. 1 2 3 4 5 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. 1 2 3 4 5 6 Stassun, Keivan G.; et al. (2019-10-01). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.
  3. 1 2 "11 Sge". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-02-26.
  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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  5. 1 2 Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID 118345778.
  6. ↑ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
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