Coord 2000 | 10200+1950 |
Discov num | STF1424 |
Comp | AB |
Coord arcsec 2000 | 10 19 58.35 +19 50 29.4 |
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Date first | 1820 |
Date last | 2019 |
Obs | 854 |
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Pa first | 99 |
Pa last | 126 |
P.A. Now (θ) | 126.5° |
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Sep first | 3.7 |
Sep last | 4.9 |
Sep. Now (ρ) | 4.73" |
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Mag pri | 2.37 |
Mag sec | 3.64 |
delta mag (ΔM) | 1.27 |
Spectral class | K0III (yellow-orange) |
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Pri motion ra | +311 |
Sec motion ra | +306 |
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Pri motion dec | -153 |
Sec motion dec | -161 |
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Notes |
Show | name | SAO | coord_2000 | discov# | comp | first | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | Algieba | 81298 | 10200+1950 | STF1424 | AB | 1820 | 2019 | 854 | 126 | 4.7 | 2.37 | 3.64 | 1.27 | Y | <=== |
Show | 10200+1950 | STF1424 | AC | 1851 | 2016 | 31 | 288 | 341.2 | 2.37 | 9.64 | 7.27 | ||||
Show | 10200+1950 | STF1424 | AD | 1904 | 2016 | 15 | 302 | 371.3 | 2.37 | 10.62 | 8.25 | ||||
Show | 10200+1950 | STF1424 | BC | 1877 | 1998 | 9 | 288 | 327.4 | 3.64 | 9.64 | 6.00 | ||||
Show | 10200+1950 | BAG 32 | Ca,Cb | 1981 | 2012 | 4 | 24 | 0.2 | 9.64 | Y | |||||
Show | 10200+1950 | STF1424 | CD | 1852 | 2016 | 30 | 6 | 90.7 | 9.64 | 10.62 | 0.98 | ||||
Show | 10200+1950 | FYM 38 | CE | 1998 | 2012 | 3 | 59 | 148.6 | 9.64 | 12.95 | 3.31 | ||||
Show | 10200+1950 | FYM 38 | CF | 1998 | 2012 | 3 | 238 | 53.4 | 9.64 | 14.10 | 4.46 |
Precise pa | 126.3 |
Precise sep | 4.946 |
Common name | Algieba |
Other names | Algeiba |
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Constellation | Leo |
SAO | 81298 |
HIP | 50583 |
Tycho2 | 1423-01349-1 |
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HD | 89484 |
HR | 4057 |
GC | 14177 |
ADS | 7724 |
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BD | BD+20 2467 |
Bayer | Gamma 1 Leonis |
Bayer name | Gam1 Leo |
Flamsteed | 41 Leonis |
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Flamsteed name | 41 Leo |
Distance | 39.89 |
Distance ly | 130.12 |
last precise pa | 126.3 |
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last precise sep | 4.946 |
Period (P) | 554y | ± 27 | Periastron (T) | 1769y | ± 13 | Semi-major axis (a) | 3.1a | ± 0.1 |
Eccentricity (e) | 0.93 | ± 0.02 | Inclination (i) | 41° | ± 5 | Longitude of periastron (ω) | 114° | ± 10 |
Node (Ω) | 188° | ± 14 | Note | Grade | 4 | (1=Definitive, 9=Indet.) | ||
Equinox | 2000 | Last observation | 2010 |
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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Period (P) | 554y | ± 27 | Periastron (T) | 1750y | ± 16 | Semi-major axis (a) | 3.1a | ± 0.1 |
Eccentricity (e) | 0.9 | ± 0.03 | Inclination (i) | 49° | ± 6 | Longitude of periastron (ω) | 309° | ± 6 |
Node (Ω) | 347° | ± 9 | Note | Grade | 4 | (1=Definitive, 9=Indet.) | ||
Equinox | 2000 | Last observation | 2010 |
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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coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
10200+1950 | STF1424 | AB | 2008 | 769 | 126 | 4.4 | 2.37 | 3.64 | K0III | NODV | 101958.16+195030.7 |
10200+1950 | STF1424 | AB | 2010 | 800 | 126 | 4.7 | 2.37 | 3.64 | K0III | NOD | 101958.16+195030.7 |
10200+1950 | STF1424 | AB | 2012 | 805 | 126 | 4.3 | 2.37 | 3.64 | K0III | NOD | 101958.16+195030.7 |
10200+1950 | STF1424 | AB | 2013 | 822 | 126 | 4.6 | 2.37 | 3.64 | K0III | NOD | 101958.16+195030.7 |
10200+1950 | STF1424 | AB | 2014 | 819 | 127 | 4.6 | 2.37 | 3.64 | K0III | NOD | 101958.16+195030.7 |
10200+1950 | STF1424 | AB | 2015 | 834 | 127 | 4.7 | 2.37 | 3.64 | K0III | NO | 101958.16+195030.7 |
10200+1950 | STF1424 | AB | 2016 | 843 | 126 | 4.7 | 2.37 | 3.64 | K0III | NO | 101958.35+195029.4 |
10200+1950 | STF1424 | AB | 2017 | 848 | 126 | 4.8 | 2.37 | 3.64 | K0III | NO | 101958.35+195029.4 |
10200+1950 | STF1424 | AB | 2018 | 853 | 128 | 4.8 | 2.37 | 3.64 | K0III | NO | 101958.35+195029.4 |