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Current system

11239+1032
STF1536AB
Tsze tseang

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

11239+1032 STF1536AB (Tsze tseang)

11^h 23^m 55.37^s +10° 31' 46.9" P.A. 91.50 sep 2.2 mag 4.06,6.71 Sp F4IV dist. 23.67 pc (77.21 l.y.)

Coord 2000	11239+1032		Discov num	STF1536		Comp	AB		Coord arcsec 2000	11 23 55.37 +10 31 46.9
Date first	1827		Date last	2019		Obs	552
Pa first	95		Pa last	93		P.A. Now (θ)	91.5°
Sep first	3.0		Sep last	2.2		Sep. Now (ρ)	2.24"
Mag pri	4.06		Mag sec	6.71		delta mag (ΔM)	2.65		Spectral class	F4IV (yellow-white)
Pri motion ra	+153		Sec motion ra	+153
Pri motion dec	-065		Sec motion dec	-065
Notes	N O (See Notes, Orbital solution)

This double is physical.

11239+1032 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Tsze tseang	99587	11 23 55 +10 31 47	STF 1536 AB	2019	552	92	2.2	4.06	6.71	2.65	Y	<===
Show		99587	11 23 55 +10 31 47	STF 1536 AB,C	2015	7	346	332.1	4.06	11.06	7.00

Triple system
4 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa	93.1		Precise sep	2.16		Common name	Tsze tseang		Meaning	General seconds
Constellation	Leo		SAO	99587		HIP	55642		Tycho2	0858-01221-1
Gaia DR2	3915612630249291008		HD	99028		HR	4399		GC	15652
ADS	8148		BD	BD+11 2348		Bayer	Iota Leonis		Bayer name	Iot Leo
Flamsteed	78 Leonis		Flamsteed name	78 Leo		Distance	23.67		Distance ly	77.21
last precise pa	93.1		last precise sep	2.16

ORBITAL ELEMENTS

Period (P)	184.4572y	± 1.3275	Periastron (T)	1948.3626y	± 0.2117	Semi-major axis (a)	1.91525a	± 0.0155
Eccentricity (e)	0.53689	± 0.00459	Inclination (i)	127.642°	± 0.598	Longitude of periastron (ω)	142.829°	± 0.878
Node (Ω)	54.376°	± 0.846	Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox			Last observation	2014

label	rho	theta
2000	1.700	111.7
2001	1.728	110.4
2002	1.756	109.2
2003	1.783	108.0
2004	1.811	106.9
2005	1.838	105.8
2006	1.865	104.7
2007	1.893	103.6
2008	1.919	102.6
2009	1.946	101.6
2010	1.972	100.7
2011	1.998	99.7
2012	2.024	98.8
2013	2.050	97.9
2014	2.075	97.1
2015	2.100	96.2
2016	2.124	95.4
2017	2.148	94.6
2018	2.172	93.8
2019	2.195	93.0
2020	2.218	92.3
2021	2.241	91.5
2022	2.263	90.8
2023	2.284	90.1
2024	2.306	89.4
2025	2.326	88.7
2026	2.347	88.0
2027	2.366	87.4
2028	2.386	86.7
2029	2.405	86.1
2030	2.423	85.4

grafico orbita

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

wds11239%2B1032c.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
11239+1032	STF1536	AB	2007	508	105	1.9	4.06	6.71	F4IV	NOD	112355.37+103146.9
11239+1032	STF1536	AB	2010	525	101	2.0	4.06	6.71	F4IV	NOD	112355.37+103146.9
11239+1032	STF1536	AB	2011	532	101	2.0	4.06	6.71	F4IV	NOD	112355.37+103146.9
11239+1032	STF1536	AB	2013	534	95	2.1	4.06	6.71	F4IV	NOD	112355.37+103146.9
11239+1032	STF1536	AB	2014	538	100	1.9	4.06	6.71	F4IV	NOD	112355.37+103146.9
11239+1032	STF1536	AB	2015	540	99	2.0	4.06	6.71	F4IV	NO	112355.37+103146.9
11239+1032	STF1536	AB	2016	543	96	2.2	4.06	6.71	F4IV	NO	112355.37+103146.9
11239+1032	STF1536	AB	2017	545	97	2.1	4.06	6.71	F4IV	NO	112355.37+103146.9
11239+1032	STF1536	AB	2018	549	96	2.2	4.06	6.71	F4IV	NO	112355.37+103146.9
11239+1032	STF1536	AB	2019	552	93	2.2	4.06	6.71	F4IV	NO	112355.37+103146.9

If you need more information about this double, apply for a data request form to the WDS.