Mu Piscium

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Mu Piscium[1]
Diagram showing star positions and boundaries of the Pisces constellation and its surroundings
Cercle rouge 100%.svg

Location of μ Piscium(circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 01h 30m 11.1151s
Declination +6° 8' 37.754"
Apparent magnitude (V) 4.84
Spectral type K4III
U−B color index +1.53
B−V color index +1.38
Radial velocity (Rv) 34.0 km/s
Proper motion (μ) RA: 293.23 mas/yr
Dec.: -46.36 mas/yr
Parallax (π) 9.05 ± 0.73 mas
Distance 360 ± 30 ly
(110 ± 9 pc)
Other designations
μ Piscium, μ Psc, Mu Psc, 98 Piscium, BD+05 194, CCDM J01301+0609A, FK5 2099, GC 1819, HD 9138, HIP 7007, HR 434, IDS 01249+0537 A, PPM 144670, SAO 109926, WDS J01302+0609A.

Mu Piscium (Mu Psc, μ Piscium, μ Psc) is a multiple star with three components approximately 360 light years away from Earth, in the constellation Pisces. Its nearest multiple is approximately 5.6 degrees dimmer in apparent magnitude.[2]


In Chinese, 外屏 (Wài Píng), meaning Outer Fence, refers to an asterism consisting of refers to an asterism consisting of μ Piscium, δ Piscium, ε Piscium, ζ Piscium, ν Piscium, ξ Piscium and α Piscium. Consequently, μ Piscium itself is known as 外屏四 (Wài Píng sì, English: the Fourth Star of Outer Fence.)[3]