Delta Sagittarii

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δ Sagittarii
Observation data
Equinox J2000.0
Constellation 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
19 Sagittarii, HR 6859,
HD 168454, SAO 186681,
HIP 89931, ADS 11264,
CCDM 18210-2950

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".

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