Mekbuda
Double star Mekbuda (ζ Geminorum) |
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AladinLite | |||||||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Twins | ||||||||||||||||||||
Right ascension | 07 h 04 m 6.5 s | ||||||||||||||||||||
declination | + 20 ° 34 ′ 13 ″ | ||||||||||||||||||||
Apparent brightness | 3.79 (3.62-4.18) mag | ||||||||||||||||||||
Typing | |||||||||||||||||||||
B − V color index | (0.79) | ||||||||||||||||||||
U − B color index | (0.62) | ||||||||||||||||||||
Spectral class | F7 Ib to G3 Ib | ||||||||||||||||||||
Variable star type | DCEP | ||||||||||||||||||||
Astrometry | |||||||||||||||||||||
Radial velocity | (2.8 ± 0.2) km / s | ||||||||||||||||||||
parallax | (2.37 ± 0.30) mas | ||||||||||||||||||||
distance | 1,200 ly | ||||||||||||||||||||
Proper movement | |||||||||||||||||||||
Rec. Share: | (−7.29 ± 0.49) mas / a | ||||||||||||||||||||
Dec. portion: | (−0.41 ± 0.32) mas / a | ||||||||||||||||||||
Physical Properties | |||||||||||||||||||||
radius | (60) R ☉ | ||||||||||||||||||||
Effective temperature | (5300 to 5800) K | ||||||||||||||||||||
Other names and catalog entries |
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Mekbuda (from Arabic الذراع المقبوضة, DMG aḏ-ḏirāʿ al-maqbūḍa 'drawn in arm') is the proper name of the star Zeta Geminorum (short: ζ Gem) in the constellation Gemini .
Mekbuda is a variable star of the Delta Cephei type , the apparent magnitude of which fluctuates between +3.62 m and +4.18 m with a period of 10.15 days.
As is typical for Cepheids, its spectral class is also variable and lies between F7 Ib and G3 Ib.
Mekbuda has a +7.6 mag bright companion of the spectral type G1 at an angular distance of 101 "at a position angle of 346 degrees, which can already be seen in prism binoculars . Mekbuda is approx. 1170 light years away.
As a star near the ecliptic, Mekbuda can be covered by the moon and (very rarely!) By planets .