10200+1950 STF 1424 AB (Algieba)

 
 
10h 19m 58.35s +19 50' 29.4" P.A. 127.00 sep 4.7 mag 2.37,3.64 Sp K1III+gG7 dist. 39.89 pc (130.12 l.y.)
 
 
Coord 2000 10200+1950 Discov num STF1424 Comp AB Coord arcsec 2000 10 19 58.35 +19 50 29.4
Date first 1820 Date last 2020 Obs 863
Pa first 99 Pa last 126.6 P.A. Now (θ) 126.6°
Sep first 3.7 Sep last 4.74 Sep. Now (ρ) 4.74"
Mag pri 2.37 Mag sec 3.64 delta mag (ΔM) 1.27 Spectral class K1III+gG7 (yellow-orange)
Pri motion ra +311 Sec motion ra +306
Pri motion dec -153 Sec motion dec -161
Notes N O V (See Notes, Orbital solution, Proper motion indicates physical)
rPM=0.027 (< 0.3, Physical double)
This double is physical.
 
 
10200+1950 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Algieba 81298 10 19 58 +19 50 29 STF 1424 AB 2020 863 127 4.7 2.37 3.64 1.27 Y <===
Show 81298 10 19 58 +19 50 29 STF 1424 AC 2016 31 288 341.2 2.37 9.64 7.27
Show 81298 10 19 58 +19 50 29 STF 1424 AD 2016 15 302 371.3 2.37 10.62 8.25
Show 10 19 59 +19 50 27 STF 1424 BC 1998 9 288 327.4 3.64 9.64 6.00
Show 10 19 36 +19 52 12 BAG 32 Ca,Cb 2012 4 24 0.2 9.30 11.30 2.00 Y
Show 10 19 36 +19 52 12 STF 1424 CD 2016 30 6 90.7 9.64 10.62 0.98
Show 10 19 36 +19 52 12 FYM 38 CE 2012 3 59 148.6 9.64 12.95 3.31
Show 10 19 36 +19 52 12 FYM 38 CF 2012 3 238 53.4 9.64 14.10 4.46
Septuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Algieba Var name NSV4823 Leo Constellation Leo SAO 81298
HIP 50583 Tycho2 1423-01349-1 HD 89484 HR 4057
GC 14177 ADS 7724 BD BD+20 2467 Bayer Gamma 1 Leonis
Bayer name Gam1 Leo Flamsteed 41 Leonis Flamsteed name 41 Leo Distance 39.89
Distance ly 130.12 Bayer greek γ1 Leo
Other names Algeiba
Meaning From Arabic: ?????? al-jabha ('the forehead' [of the lion]).
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
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 Notesn ReferencePkO2014c
Equinox2000 Last observation2010 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 125.0 4.646
2001 125.1 4.651
2002 125.1 4.656
2003 125.2 4.660
2004 125.3 4.665
2005 125.4 4.670
2006 125.5 4.674
2007 125.5 4.678
2008 125.6 4.683
2009 125.7 4.687
2010 125.8 4.691
2011 125.9 4.695
2012 125.9 4.699
2013 126.0 4.703
2014 126.1 4.707
2015 126.2 4.711
2016 126.2 4.714
2017 126.3 4.718
2018 126.4 4.722
2019 126.5 4.725
2020 126.6 4.728
2021 126.6 4.732
2022 126.7 4.735
2023 126.8 4.738
2024 126.9 4.741
2025 126.9 4.744
2026 127.0 4.747
2027 127.1 4.750
2028 127.2 4.753
2029 127.2 4.755
2030 127.3 4.758


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds10200%2B1950b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
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 Notesn ReferencePkO2014c
Equinox2000 Last observation2010 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 125.8 4.666
2001 125.9 4.671
2002 126.0 4.676
2003 126.1 4.681
2004 126.2 4.686
2005 126.2 4.690
2006 126.3 4.695
2007 126.4 4.699
2008 126.5 4.703
2009 126.6 4.708
2010 126.6 4.712
2011 126.7 4.716
2012 126.8 4.720
2013 126.9 4.724
2014 127.0 4.728
2015 127.0 4.731
2016 127.1 4.735
2017 127.2 4.739
2018 127.3 4.742
2019 127.4 4.746
2020 127.4 4.749
2021 127.5 4.752
2022 127.6 4.756
2023 127.7 4.759
2024 127.8 4.762
2025 127.8 4.765
2026 127.9 4.768
2027 128.0 4.771
2028 128.1 4.773
2029 128.1 4.776
2030 128.2 4.778


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds10200%2B1950c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic