11 Sagittae

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

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

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. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 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 .