11239+1032 STF1536AB (Tsze tseang)

 
 
11h 23m 55.37s +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 Grade2(1=Definitive, 9=Indet.)
Equinox Last observation2014
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

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