| appmag_v = 4.38[3]
}}{{Starbox character
| class = {{nowrap|G8 IIIa CN 0.5}}[4]
| u-b = +0.89[5]
| b-v = +1.05[5]
| r-i = +0.50[5]
}}{{Starbox astrometry
| radial_v = {{Val|−22.0|0.3}}[8]
| prop_mo_ra = 7.682 ± 0.258[9]
| prop_mo_dec = −32.987 ± 0.279[9]
| parallax = 7.7237
| p_error = 0.1941
| parallax_footnote = [1]
| absmag_v={{val|-1.39|+0.22|-0.20}}[12]
}}{{Starbox detail
| mass = 4.33[13]
| radius = {{Val|27|3}}[14]
| luminosity = 392[15]
| gravity = 2.79[12]
| metal_fe = –0.03[12]
| temperature = 4,850[12]
| rotational_velocity = {{val|9.1|0.7}}[12]
| age_myr = 129[20]
}}{{Starbox catalog
| names= {{odlist | B=β Sge | F=6 Sagittae | BD=+17° 4048 | FK5=1513 | HD=185958 | HIP=96837 | HR=7488 | SAO=105133 | GC=27236 | PPM=136766 }}[21]
}}{{Starbox reference
| Simbad=beta+sagittae
}}{{Starbox end}}Beta Sagittae, Latinized from β Sagittae, is a single[22] star in the northern constellation of Sagitta. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.38.[3] Based upon an annual parallax shift of 7.7237 mas as seen from the Gaia satellite, it is located 420 light years from the Sun. The star is moving closer to the Sun with a radial velocity of −22 km/s.[8]This is an evolved red giant[20] with a stellar classification of {{nowrap|G8 IIIa CN 0.5}}.[4] The suffix notation indicates a mild overabundance of the cyanogen molecule in the spectrum. Beta Sagittae is an estimated 129 million years old with 4.33[13] times the mass of the Sun and has expanded to roughly 27[14] times the Sun's radius. The star is radiating 392[15] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,850 K.[12]
Naming
In Chinese, {{lang|zh|左旗}} ({{lang|zh-Latn|Zuǒ Qí}}), meaning Left Flag, refers to an asterism consisting of β Sagittae, α Sagittae, δ Sagittae, ζ Sagittae, γ Sagittae, 13 Sagittae, 11 Sagittae, 14 Sagittae and ρ Aquilae. Consequently, β Sagittae itself is known as {{lang|zh|左旗二}} ({{lang|zh-Latn|Zuǒ Qí èr}}, {{lang-en|the Second Star of Left Flag}}.)[2]
References
1. ^1 2 {{cite DR2|1823991938300446336}}
2. ^{{zh icon}} AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日
3. ^1 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }}
4. ^1 2 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental parameters and infrared excesses of Hipparcos stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | pages=343 | year=2012 | doi=10.1111/j.1365-2966.2012.21873.x | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | postscript=. }}
5. ^1 2 {{citation | title=Spectroscopic study on the beryllium abundances of red giant stars | journal=Publications of the Astronomical Society of Japan | volume=66 | issue=5 | pages=91 | year=2014 | last1=Takeda | first1=Yoichi | last2=Tajitsu | first2=Akito | doi=10.1093/pasj/psu066 | bibcode=2014PASJ...66...91T | arxiv=1406.7066 | postscript=. }}
6. ^1 2 {{citation | postscript=. | title=The Lithium Abundances of a Large Sample of Red Giants | display-authors=1 | last1=Liu | first1=Y. J. | last2=Tan | first2=K. F. | last3=Wang | first3=L. | last4=Zhao | first4=G. | last5=Sato | first5=Bun'ei | last6=Takeda | first6=Y. | last7=Li | first7=H. N. | journal=The Astrophysical Journal | arxiv=1404.1687 | volume=785 | issue=2 | id=94 | pages=12 | date=April 2014 | doi=10.1088/0004-637X/785/2/94 | bibcode=2014ApJ...785...94L }}
7. ^1 2 {{citation | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32| issue=11| pages=759–771| date=November 2006 | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G | arxiv=1606.08053 | postscript=. }}
8. ^1 2 {{citation | postscript=. | last1=Fernie | first1=J. D. | title=New UBVRI photometry for 900 supergiants | journal=Astrophysical Journal Supplement Series | volume=52 | pages=7–22 |date=May 1983 | doi=10.1086/190856 | bibcode=1983ApJS...52....7F }}
9. ^1 2 {{citation | postscript=. | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245 | year=1989 | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | doi=10.1086/191373 | bibcode=1989ApJS...71..245K }}
10. ^1 2 3 {{citation | title=The Bright Star Catalogue | edition=5th Revised Ed. (Preliminary Version) | first1=D. | last1=Hoffleit | first2=W. H. | last2=Warren, Jr. | publisher=CDS | postscript=. }} HR 7488, database entry
11. ^1 2 3 4 5 6 {{citation | display-authors=1 | last1=Carney | first1=Bruce W. | last2=Gray | first2=David F. | last3=Yong | first3=David | last4=Latham | first4=David W. | last5=Manset | first5=Nadine | last6=Zelman | first6=Rachel | last7=Laird | first7=John B. | title=Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars | journal=The Astronomical Journal | volume=135 | issue=3 | pages=892–906 | date=March 2008 | doi=10.1088/0004-6256/135/3/892 | bibcode=2008AJ....135..892C | arxiv=0711.4984 | postscript=. }}
12. ^1 2 {{citation | title=Supergiant temperatures and linear radii from near-infrared interferometry | journal=Monthly Notices of the Royal Astronomical Society | volume=394 | issue=4 | pages=1925 | year=2009 | last1=Van Belle | first1=G. T. | last2=Creech-Eakman | first2=M. J. | last3=Hart | first3=A. | display-authors=1 | bibcode=2009MNRAS.394.1925V | arxiv=0811.4239 | doi=10.1111/j.1365-2966.2008.14146.x | postscript=. }}
13. ^1 {{cite simbad | title=bet Sge | accessdate=2017-11-26 | postscript=. }}