Epsilon Sagittarii

Epsilon Sagittarii (circled) in the constellation Sagittarius.
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 18
Declination –34° 23′ 04.6193″
Apparent magnitude (V) +1.85
Characteristics
Spectral type B9.5 III
U−B color index +0.13
B−V color index –0.03
Astrometry
Radial velocity (Rv) –15 km/s
Proper motion (μ) RA: –39.42 mas/yr
Parallax (π) 22.76 ± 0.24mas
Distance 143 ± 2 ly
(43.9 ± 0.5 pc)
Absolute magnitude (MV) –1.41
Details
ε Sgr A
Mass 3.515 ± 0.138M
Radius 6.8R
Luminosity 363L
Surface gravity (log g) 4.50
Temperature 9,960K
Rotational velocity (v sin i) 236 km/s
Age 232Myr
ε Sgr B
Mass 0.95M
Luminosity 0.89L
Temperature 5,807K
Other designations
Kaus Australis, 20 Sagittarii, FK5 689, HD 169022, HIP 90185, HR 6879, SAO 210091.

Get more info about Kaus Australis in Wikipedia

This article uses material from the Wikipedia article
Kaus Australis, which is released under the Creative Commons Attribution-Share-Alike License 3.0