Coord 2000 | 07346+3153 | Discov num | STF1110 | Comp | AB | Coord arcsec 2000 | 07 34 35.86 +31 53 17.8 | ||||
Date first | 1778 | Date last | 2020 | Obs | 1514 | ||||||
Pa first | 303 | Pa last | 52.6 | P.A. Now (θ) | 50.7° | ||||||
Sep first | 5.2 | Sep last | 5.38 | Sep. Now (ρ) | 5.566" | ||||||
Mag pri | 1.93 | Mag sec | 2.97 | delta mag (ΔM) | 1.04 | Spectral class | A1V+A4Vm (white/white) | ||||
Pri motion ra | -206 | Sec motion ra | -206 | ||||||||
Pri motion dec | -148 | Sec motion dec | -148 | ||||||||
Notes | N O V (See Notes, Orbital solution, Proper motion indicates physical) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 60198 | 07 34 36 +31 53 18 | CIA 29 Aa,Ab | 2021 | 16 | 293 | 0.0 | 1.93 | |||||
Show | Castor | 60198 | 07 34 36 +31 53 18 | STF 1110 AB | 2020 | 1514 | 53 | 5.4 | 1.93 | 2.97 | 1.04 | Y | <=== |
Show | 60198 | 07 34 36 +31 53 18 | STF 1110 AC | 2020 | 157 | 164 | 71.6 | 1.93 | 9.83 | 7.90 | |||
Show | 60198 | 07 34 36 +31 53 18 | STF 1110 AD | 2017 | 17 | 221 | 179.8 | 1.93 | 10.07 | 8.14 | |||
Show | 60198 | 07 34 36 +31 53 18 | CIA 29 Ba,Bb | 2021 | 12 | 302 | 0.0 | 2.97 | |||||
Show | 60198 | 07 34 36 +31 53 18 | STF 1110 BC | 2020 | 125 | 168 | 73.8 | 2.97 | 9.83 | 6.86 | |||
Show | 60198 | 07 34 37 +31 52 10 | STF 1110 CD | 2015 | 6 | 244 | 154.9 | 9.83 | 10.07 | 0.24 | Y |
Common name | Castor | Var name | YY Gem | Constellation | Gemini | SAO | 60198 | ||||
HIP | 36850 | Tycho2 | 2457-02407-1 | Gaia DR2 | 892348694913021056 | HD | 60179 | ||||
HR | 2891 | GC | 10120 | ADS | 6175 | GL | Gl 278A | ||||
BD | BD+32 1581 | Bayer | Alpha Geminorum | Bayer name | Alp Gem | Flamsteed | 66 Geminorum | ||||
Flamsteed name | 66 Gem | FK5 | 287 | Distance | 15.6 | Distance ly | 50.89 | ||||
Bayer greek | α Gem |
Other names | Apollo, Castore |
Meaning | beaver (Castor) |
Period (P) | 459.8y | Periastron (T) | 1958.7y | Semi-major axis (a) | 6.755a | |||
Eccentricity (e) | 0.336 | Inclination (i) | 114.6° | Longitude of periastron (ω) | 250.5° | |||
Node (Ω) | 41.2° | Notes | n | Reference | Doc2014g | |||
Equinox | 2000 | Last observation | 2014 | Grade | 3 | (1=Definitive, 9=Indet.) |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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