Xi Persei
Star ξ Persei (Menkib) |
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AladinLite | |||||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Perseus | ||||||||||||||||||
Right ascension | 3 h 58 m 57.9 s | ||||||||||||||||||
declination | + 35 ° 47 ′ 27.7 ″ | ||||||||||||||||||
Apparent brightness | 4.1 mag | ||||||||||||||||||
Typing | |||||||||||||||||||
B − V color index | +0.01 | ||||||||||||||||||
U − B color index | −0.92 | ||||||||||||||||||
R − I index | −0.01 | ||||||||||||||||||
Spectral class | O7.5 IIIe | ||||||||||||||||||
Astrometry | |||||||||||||||||||
Radial velocity | (+70 ± 2) km / s | ||||||||||||||||||
parallax | (2.62 ± 0.51) mas | ||||||||||||||||||
distance | (1250 ± 250) ly (380 ± 70) pc |
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Proper movement | |||||||||||||||||||
Rec. Share: | (+3.62 ± 0.61) mas / a | ||||||||||||||||||
Dec. portion: | (+1.74 ± 0.50) mas / a | ||||||||||||||||||
Physical Properties | |||||||||||||||||||
Other names and catalog entries |
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ξ Persei ( Xi Persei ), proper name Menkib , also transcribed as Menkhib or Menchib , comes from Arabic منكب, "shoulder", is a star of the spectral class O7.5 with an apparent magnitude of 4.1 mag. This makes it one of the few O stars in the sky that can be observed with the naked eye. Ξ Persei is believed to be a runaway star of the Perseus OB2 Association and is responsible for the ionization of NGC 1499 (the California Nebula).
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- ↑ a b c SIMBAD database
- ↑ a b c d Hipparchus catalog
- ↑ a b c Bright Star Catalog