Psi Sagittarii

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ψ Sagittarii
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Sagittarius
Right ascension 19h 15m 32.4s
Declination -25° 15' 24"
Apparent magnitude (V) +4.86
Distance 330 ± 37 ly
(101 ± 11 pc)
Spectral type K0III + A8V
Other designations
42 Sagittarii, HR 7292,
HD 179950, SAO 187882,
HIP 94643, ADS 12214,
CCDM 19155-2515

Psi Sagittarii (ψ Sgr / ψ Sagitarii) is a binary star in the constellation Sagittarius. The star system is 330 light years from Earth. The two stars are separated by 0.15 arcseconds on the sky, which puts them approximately 15 Astronomical Units apart. The star system has a combined apparent magnitude of +4.86. The orbital period of the system is 18.8 years.

The two components have similar luminosities, with apparent magnitudes of +5.6 and +5.7. Stellar classification is somewhat uncertain. The stars have been classified as either a type A8 dwarf with a type G8 or K0 giant companion, or else a type F2 dwarf with an F7 giant companion.

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