Omega Sagittarii

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Omega Sagittarii
Location of ω Sagittarii (circled)
Observation data
ICRS
)
Constellation Sagittarius
Right ascension 19h 55m 50.36255s[1]
Declination −26° 17′ 57.6933″[1]
Apparent magnitude (V) 4.70[2]
Characteristics
Evolutionary stage subgiant
Spectral type G5 IV[3]
U−B color index +0.32[4]
B−V color index +0.748±0.015[1]
R−I color index +0.37[4]
Distance
76.4 ± 1.0 ly
(23.4 ± 0.3 pc)
Absolute magnitude (MV)2.64[2]
Semi-amplitude
(K1)
(primary)		12.255±0.041 km/s
Details
Gyr
PPM 270451[9]
Database references
SIMBADdata

Omega Sagittarii, which is

lunar occultations.[12]

The members of this system orbit each other with a

luminosity of the Sun from its photosphere at an effective temperature of 5,499 K.[7]

Nomenclature

The four stars of the Terebellum
The four stars of the Terebellum

ω Sagittarii (Latinised to Omega Sagittarii) is the star's Bayer designation.

This star, together with

Terebellum.[13] According to a 1971 NASA memorandum, Terebellum was originally the title for four stars: Omega Sagittarii as Terebellum I, 59 Sagittarii as Terebellum II, 60 Sagittarii as Terebellum III and 62 Sagittarii as Terebellum IV .[14] In 2016, the IAU organized a Working Group on Star Names (WGSN)[15] to catalog and standardize proper names for stars. The WGSN approved the name Terebellum for Omega Sagittarii on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.[10]

In

Chinese name for Omega Sagittarii itself is 狗國一 (Gǒu Guó yī, English: the First Star of Dog Territory.)[16]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119257644
    .
  3. ^
    S2CID 123149047
    .
  4. ^
    CDS ID V/50. HR 7597 Archived 2016-03-04 at the Wayback Machine
    , database entry. Accessed on line November 19, 2009.
  5. ^
    S2CID 18759600
    .
  6. ^
    doi:10.3847/1538-3881/aad3c1
    , 117.
  7. ^
    S2CID 62799777
    , A55.
  8. ^
    S2CID 119511744
    , 21.
  9. ^ a b "ome Sgr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-28.
  10. ^ a b "Naming Stars". IAU.org. Retrieved 16 December 2017.
  11. ^ "Terebella". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  12. hdl:2152/34378
    .
  13. ISBN 0-486-21079-0
    . Retrieved 2012-09-04.
  14. ^ Rhoads, Jack W. (November 15, 1971), Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, California Institute of Technology: Jet Propulsion Laboratory, retrieved 2023-02-01.
  15. ^ "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
  16. ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 2 日
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