Kappa Sagittarii
The Bayer designation Kappa Sagittarii (Kappa Sgr, κ Sagittarii, κ Sgr) is shared by two star systems, κ¹ Sagittarii and κ² Sagittarii, in the constellation Sagittarius. The two star systems are separated by 0.46° in the sky.
κ¹ Sagittarii
|
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 20h 22m 27.5s |
| Declination | -42° 02' 59" |
| Apparent magnitude (V) | +5.60 |
| Distance | 244 ± 15 ly (75 ± 5 pc) |
| Spectral type | A0V |
| Other designations | |
Kappa¹ Sagittarii (Kappa¹ Sgr, κ¹ Sagittarii, κ¹ Sgr) is a triple star system lying 244 light years from Earth. The primary star, κ¹ Sagittarii A, is a spectral type A0 dwarf which has an apparent magnitude of +5.6. It is orbited by two companions, κ¹ Sagittarii B, a magnitude +12.6 star 31.7 arcseconds from the primary, and the magnitude +11.6 κ¹ Sagittarii C, which lies 52 arcseconds from A.
Kappa¹ Sagittarii is moving through the Galaxy at a speed of 28.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 19,600 and 24,000 light years from the center of the Galaxy.[1]
κ² Sagittarii
|
|
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 20h 23m 53.2s |
| Declination | -42° 25' 22" |
| Apparent magnitude (V) | +5.64 |
| Distance | 371 ± 40 ly (114 ± 12 pc) |
| Spectral type | A3V |
| Other designations | |
Kappa² Sagittarii (Kappa² Sgr, κ² Sagittarii, κ² Sgr)is a quadruple system 371 light years from Earth. κ² Sagittarii A is a spectral type A3 dwarf with an apparent magnitude of +5.64. It is orbited by a close 7th magnitude companion, κ² Sagittarii B, which is 0.8 arcseconds, or approximately 90 Astronomical Units, away from the primary. Orbiting this pair are two more stars, the 15th magnitude κ² Sagittarii C, with a separation of 15.0 arcseconds, and the 14th magnitude κ² Sagittarii D, which is 29.3 arcseconds from the primary.
Kappa² Sagittarii is It is moving through the Galaxy at a speed of 11.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,500 and 40,000 light years from the center of the Galaxy.[2]