10200+1950 STF1424AB (Algieba)

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	862
Pa first	99		Pa last	127		P.A. Now (θ)	126.6°
Sep first	3.7		Sep last	4.7		Sep. Now (ρ)	4.73"
Mag pri	2.37		Mag sec	3.64		delta mag (ΔM)	1.27		Spectral class	K0III (yellow-orange)
Pri motion ra	+311		Sec motion ra	+306
Pri motion dec	-153		Sec motion dec	-161
Notes	N O (See Notes, Orbital solution)

rPM=0.027 (< 0.3, Physical double) This double is physical.

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	862	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		81298	10 19 59 +19 50 27	STF 1424 BC	1998	9	288	327.4	3.64	9.64	6.00
Show		81292	10 19 36 +19 52 12	BAG 32 Ca,Cb	2012	4	24	0.2	9.64			Y
Show		81292	10 19 36 +19 52 12	STF 1424 CD	2016	30	6	90.7	9.64	10.62	0.98
Show		81292	10 19 36 +19 52 12	FYM 38 CE	2012	3	59	148.6	9.64	12.95	3.31
Show		81292	10 19 36 +19 52 12	FYM 38 CF	2012	3	238	53.4	9.64	14.10	4.46

Septuple system
6 visible stars in this system

Precise pa	126.6		Precise sep	4.74		Common name	Algieba		Other names	Algeiba
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		last precise pa	126.6
last precise sep	4.74

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

label rho theta 2000 4.646 125.0 2001 4.651 125.1 2002 4.656 125.1 2003 4.660 125.2 2004 4.665 125.3 2005 4.670 125.4 2006 4.674 125.5 2007 4.678 125.5 2008 4.683 125.6 2009 4.687 125.7 2010 4.691 125.8 2011 4.695 125.9 2012 4.699 125.9 2013 4.703 126.0 2014 4.707 126.1 2015 4.711 126.2 2016 4.714 126.2 2017 4.718 126.3 2018 4.722 126.4 2019 4.725 126.5 2020 4.728 126.6 2021 4.732 126.6 2022 4.735 126.7 2023 4.738 126.8 2024 4.741 126.9 2025 4.744 126.9 2026 4.747 127.0 2027 4.750 127.1 2028 4.753 127.2 2029 4.755 127.2 2030 4.758 127.3		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

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

label rho theta 2000 4.666 125.8 2001 4.671 125.9 2002 4.676 126.0 2003 4.681 126.1 2004 4.686 126.2 2005 4.690 126.2 2006 4.695 126.3 2007 4.699 126.4 2008 4.703 126.5 2009 4.708 126.6 2010 4.712 126.6 2011 4.716 126.7 2012 4.720 126.8 2013 4.724 126.9 2014 4.728 127.0 2015 4.731 127.0 2016 4.735 127.1 2017 4.739 127.2 2018 4.742 127.3 2019 4.746 127.4 2020 4.749 127.4 2021 4.752 127.5 2022 4.756 127.6 2023 4.759 127.7 2024 4.762 127.8 2025 4.765 127.8 2026 4.768 127.9 2027 4.771 128.0 2028 4.773 128.1 2029 4.776 128.1 2030 4.778 128.2		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

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
10200+1950	STF1424	AB	2019	854	126	4.9	2.37	3.64	K0III	NO	101958.35+195029.4
10200+1950	STF1424	AB	2020	857	127	4.7	2.37	3.64	K0III	NO	101958.35+195029.4

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