11 Sagittae

11 Sagittae is a blue in the constellation Sagitta with a spectral type of B9III.

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]
Distance	431 ± 3 ly (132 ± 1 pc)
Details
Mass	2.47[2] M☉
Radius	4.02[2] R☉
Luminosity	127[2] L☉
Surface gravity (log g)	3.62[2] cgs
Temperature	9,661[2] K
Metallicity [Fe/H]	0.0[5] dex
Rotational velocity (v sin i)	34[6] km/s
Age	242[5] Myr
Other designations
11 Sge, BD+16°4081, HD 189090, HIP 98324, HR 7622, SAO 105471[3]
Database references
SIMBAD	data

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).^{[citation needed]}

References

1. 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. 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. "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. 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.