Epsilon Sagittarii
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Sagittarius |
| Right ascension | 18h 24m 10.3s |
| Declination | -34° 23′ 03.5″ |
| Apparent magnitude (V) | 1.79 |
| Characteristics | |
| Spectral type | B9.5 III |
| U-B color index | -0.13 |
| B-V color index | -0.03 |
| Variable type | ? |
| Astrometry | |
| Radial velocity (Rv) | -15 km/s |
| Proper motion (μ) | RA: -39.61 mas/yr Dec.: -124.05 mas/yr |
| Parallax (π) | 22.55 ± 1.02 mas |
| Distance | 145 ± 7 ly (44 ± 2 pc) |
| Absolute magnitude (MV) | -1.45 |
| Details | |
| Mass | 5 M☉ |
| Radius | 7 R☉ |
| Luminosity | 375 L☉ |
| Temperature | 9,200 K |
| Metallicity | ? |
| Rotation | 140 km/s. |
| Age | ? years |
| Other designations | |
Epsilon Sagittarii (ε Sgr / ε Sagittarii) is a binary star that lies 144.64 light-years distant in the constellation Sagittarius. It has a faint, 14th magnitude companion, Epsilon Sagittarii B, 32 arcseconds distant.
The star forms the base of the archer's "bow" in Sagittarius and also marks the base of the spout of the so-called "Teapot" asterism It's traditional name is Kaus Australis; which comes from the Arabic قوس qaws 'bow' and Latin austrālis 'southern'.
[edit] External links
 |
This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it. |
