Delta Sagittarii
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Sagittarius |
| Right ascension | 18h 20m 59.7s |
| Declination | -29° 49' 41" |
| Apparent magnitude (V) | +2.72 |
| Distance | 306 ± 27 ly (94 ± 8 pc) |
| Spectral type | K3III |
| Other designations | |
Delta Sagittarii (δ Sgr / δ Sagittarii) is a star system in the constellation Sagittarius. It also has the traditional names Kaus Media, Kaus Meridionalis, and Media. Kaus Media is 306 light years from Earth and radiates with a total luminosity of 1180 times that of the Sun. The radius of Delta Sgr is 62 times solar while its mass is about 5 times the solar mass.
Kaus Media has an apparent magnitude of +2.72 and belongs to the spectral type K3. It has three dim companions:
- Delta Sagittarii B, a 14th magnitude star at a separation of 26 arcseconds,
- Delta Sagittarii C, a 15th magnitude star at a separation of 40 arcseconds, and
- Delta Sagittarii D, a 13th magnitude star at a separation of 58 arcseconds from the primary.
It is not certain that these stars form a physical system or whether they are merely aligned by chance.
In the Hindu system of Astrology, this star is also called "Purvashada Nakshatra".
[edit] Etymology
The name Kaus Media comes from the Arabic قوس qaws 'bow' and Latin media 'middle'.
