Psi Serpentis

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**ψ Serpentis**
Observation data Epoch J2000
Constellation (pronunciation)	Serpens
Right ascension	15^h 44^m 01.8197^s
Declination	+02° 30′ 54.624″
Apparent magnitude (V)	5.879
Characteristics
Spectral type	ACE: G5V + K2 + G8III
U-B color index	0.25
B-V color index	0.67
Variable type	?
Astrometry
Radial velocity (R_v)	+14 km/s
Proper motion (μ)	RA: -44.96 mas/yr Dec.: -144.73 mas/yr
Parallax (π)	68.16 ± 0.87 mas
Distance	47.9 ± 0.6 ly (14.7 ± 0.2 pc)
Absolute magnitude (M_V)	5.05
Other designations
23 Serpentis, HR 5853, HD 140538 + HD 140527 + HD 140489, SAO 121152, HIP 77052 + HIP 77043 + HIP 77034, ADS 9763, CCDM 15439+0230

Psi Serpentis (ψ Ser / ψ Serpentis) is a star system in the constellation Serpens. It is approximately 47.9 light years from Earth.

The primary component, Psi Serpentis A, is a yellow G-type main sequence dwarf with an apparent magnitude of +5.86. It has a close 12th magnitude companion, Psi Serpentis B, 4.2 arcseconds, or at least 60 Astronomical Units, distant.

Orbiting this pair with a separation of 3.5 arcminutes is the +8.8 magnitude K-type Psi Serpentis C. Slightly closer, at a distance of 2.9 arcminutes, is the +10.4 magnitude Psi Serpentis D. The brightest companion, Psi Serpentis E, a magnitude +7.1 G-type giant, is also the most distant, being separated from the primary by 5.9 arcminutes, or at least 5200 Astronomical Units.^{[citation needed]}