Epsilon Sagittarii
Sign in to saveAlso known as Kaus Australis, 20 Sagittarii, ε Sagittarii, ε Sgr, 20 Sgr, PLX 4222, PPM 297655, SRS 30689
binary star system
Key facts
- Constellation
- Sagittarius
- Right ascension
- 18 24 10.31840
- Declination
- −34 ° 23 ′ 04.6193 ″
- Apparent magnitude v
- +1.85
- Evolutionary stage
- Post-mass transfer
- Spectral type
- B9IVp
- U b color index
- +0.13
- B v color index
- –0.03
via Wikipedia infobox
Wikidata facts
- Instance of
- binary star
- Constellation
- Sagittarius
- Diameter
- 9270000
- Radius
- 6.8
- Image
- Kaus Australis.png
Show 14 more facts
- spectral class
- A0II-(n)_(sh)
- catalog code
- ALS 15808
- stellar rotational velocity
- 236
- apparent magnitude
- 1.81
- right ascension
- 276.042993351
- declination
- -34.384616486
- effective temperature
- 8930
- parallax
- 22.55
- radial velocity
- -13.0
- luminosity
- 363
- absolute magnitude
- -1.41
- right ascension component of proper motion
- -36
- declination component of proper motion
- -117
- age estimated by a dating method
- 232
via Wikidata · CC0
~5 min read
Encyclopedic overview
Epsilon Sagittarii (Latinised from ε Sagittarii, abbreviated Epsilon Sgr, ε Sgr), formally named Kaus Australis /ˈkɔːs ɔːˈstreɪlɪs/, is a binary star system in the southern zodiac constellation of Sagittarius. The apparent visual magnitude of +1.85 makes it the brightest star in Sagittarius. Based upon parallax measurements, this star is around 143 light-years (44 parsecs) from the Sun.
Observation
Excerpted from Wikipedia’s “Epsilon Sagittarii” article, available under the CC BY-SA 4.0 licence.