Chi Sagittarii

Chi SagittariiFrom Wikipedia, the free encyclopedia

The Bayer designation Chi Sagittarii (Chi Sgr, Sagittarii, Sgr) is shared by three star systems in theconstellation Sagittarius. The brightest of these, Sagittarii and Sagittarii, are separated by 0.56 on thesky. The dimmer Sagittarii is located between them,0.10 from . The Wow! signal came from the direction ofthese stars.

Contents1 Sagittarii2 Sagittarii3 Sagittarii4 Name and etymology5 References

SagittariiChiSagittarii

Location of Sagittari (circled)

Observation dataEpoch J2000.0 Equinox J2000.0

Constellation SagittariusRight ascension 19h 25m 16.5sDeclination -24 30' 31"Apparent magnitude (V) +5.02Absolute magnitude (V) +0.86Distance 221 17 ly

(68 5 pc)Spectral type A4IV/V

Other designations Sagittarii, Sgr, Chi Sgr, 47 Sagittarii,CCDM J19253-2431AB, CPD-24 6721,GC 26789, HD 182369, HIP 95477,HR 7362, IDS 19192-2442 AB,PPM 269762, SAO 188101, WDS J19253-2431AB.

Chi Sagittarii

(Chi Sgr, Sagittarii, Sgr) is a binary star. Theprimary is a spectral type A5 dwarf. The companion isapproximately 0.12 arcseconds from the primary, putting itabout 8 Astronomical Units away. The orbital period is 10.8years. The combined apparent magnitude of the system is+5.02. It is approximately 220 light years from Earth.

SagittariiChiSagittarii

Location of Sagittari (circled)

Observation dataEpoch J2000.0 Equinox J2000.0

Constellation SagittariusRight ascension 19h 25m 22.3sDeclination -24 24' 44"Apparent magnitude (V) +7.27Absolute magnitude (V) -0.57Distance 1200 500 ly

(370 150 pc)Spectral type B7IV

Other designations Sagittarii, Sgr, Chi Sgr, 48 Sagittarii,CPD-24 6722, GC 26793, HD 182391,HIP 95486, PPM 269764, SAO 188102

Chi Sagittarii

(Chi Sgr, Sagittarii, Sgr) is a spectral type B7subgiant which has an apparent magnitude of +7.26. It isapproximately 1200 light years from Earth.

SagittariiChiSagittarii

Location of Sagittari (circled)

Observation dataEpoch J2000.0 Equinox J2000.0

Constellation SagittariusRight ascension 19h 25m 29.7sDeclination -23 57' 44"Apparent magnitude (V) +5.45Absolute magnitude (V) -0.50Distance 506 81 ly

(155 25 pc)Spectral type K3III

Other designations Sagittarii, Sgr, Chi Sgr, 49 Sagittarii,CPD-24 6723, GC 26801, HD 182416,HIP 95503, HR 7363, PPM 269765,SAO 188105,

(Chi Sgr, Sagittarii, Sgr) is a spectral type K3 giantwhich has an apparent magnitude of +5.45. It is 506 lightyears from Earth.

Name and etymologyThese three star, together with Sgr, Sgr, Sgrand Sgr were Al Nam al dirah ($%& ()*&),the Returning Ostriches.[1] According to thecatalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537Named Stars, Al Nam al dirah or Namalsadirahwas originally the title for four stars: Sgr asNamalsadirah I, Sgr as Namalsadirah II, 1 Sgr asNamalsadirah III and 2 Sgr as Namalsadirah IV(except Sgr and Sgr) .[2]In Chinese, (Gu), meaning Dog, refers to anasterism consisting of Sagittarii and 52 Sagittarii.Consequently, Sagittarii itself is known as

(Gu r, English: the Second Star of Dog.)[3]

References1. ^ Allen, R. H. (1963). Star Names: Their Lore and

Meaning(http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Sagittarius*.html)(Reprint ed.). New York: Dover Publications Inc. p. 355.ISBN 0-486-21079-0. Retrieved 2012-09-04.

2. ^ Jack W. Rhoads - Technical Memorandum 33-507-AReduced Star Catalog Containing 537 Named Stars, JetPropulsion Laboratory, California Institute of Technology;November 15, 1971(http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720005197_1972005197.pdf)

3. ^ (Chinese) AEEA (Activities of Exhibition and Educationin Astronomy) 2006 7 2 (http://aeea.nmns.edu.tw/2006/0607/ap060702.html)

Retrieved from "http://en.wikipedia.org/w/index.php?title=Chi_Sagittarii&oldid=550348828"Categories: Bayer objects Sagittarius (constellation)Binary stars A-type main-sequence starsB-type subgiants K-type giants Multiple star stubs

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