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

Kappa¹ Sagittarii

Location of κ¹ Sagittarii (circled)

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Sagittarius
Right ascension	20^h 22^m 27.5^s
Declination	-42° 02' 59"
Apparent magnitude (V)	+5.60
Distance	244 ± 15 ly (75 ± 5 pc)
Spectral type	A0V
Other designations
κ¹ Sagittarii, κ¹ Sgr, Kappa¹ Sgr, CCDM J20224-4203A, CPD-42 9065, FK5 763, GC 28309, HD 193571, HIP 100469, HR 7779, IDS 20157-4222 A, PPM 326078, SAO 230177, WDS J20225-4203A.

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

Kappa² Sagittarii

Location of κ² Sagittarii (circled)

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Sagittarius
Right ascension	20^h 23^m 53.2^s
Declination	-42° 25' 22"
Apparent magnitude (V)	+5.64
Distance	371 ± 40 ly (114 ± 12 pc)
Spectral type	A3V
Other designations
κ² Sagittarii, κ² Sgr, Kappa² Sgr, CCDM J20239-4225AB, CPD-42 9068, GC 28341, HD 193807, HIP 100591, HR 7787, IDS 20171-4245 AB, PPM 326102, SAO 230184, WDS J20239-4225AB.

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]

References

1. Kappa-1 Sagittarii (HIP 100469)
2. Kappa-2 Sagittarii (HIP 100591)