11239+1032 STF 1536 AB (Tsze tseang)
11h 23m 55.37s +10° 31' 46.9" P.A. 89.00 sep 2.3 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 |
2024 |
|
Obs |
557 |
|
| Pa first |
95 |
|
Pa last |
88.8 |
|
P.A. Now (θ) |
88.7° |
|
| Sep first |
3.0 |
|
Sep last |
2.31 |
|
Sep. Now (ρ) |
2.326" |
|
| 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 |
2024 |
557 |
89 |
2.3 |
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 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Tsze tseang |
|
Var name |
NSV5184 Leo |
|
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 |
|
Bayer greek |
ι Leo |
|
ORBITAL ELEMENTS
| Period (P) | 189.561y | ± 0.814 |
Periastron (T) | 1948.86y | ± 0.278 |
Semi-major axis (a) | 1.926a | ± 0.01 |
| Eccentricity (e) | 0.55 | ± 0.003 |
Inclination (i) | 127.249° | ± 0.412 |
Longitude of periastron (ω) | 145.345° | ± 0.714 |
| Node (Ω) | 56.178° | ± 0.449 |
Notes | n | |
Reference | JAA2023 | |
| Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
111.1 |
1.708 |
| 2001 |
109.9 |
1.737 |
| 2002 |
108.8 |
1.766 |
| 2003 |
107.6 |
1.794 |
| 2004 |
106.6 |
1.823 |
| 2005 |
105.5 |
1.851 |
| 2006 |
104.5 |
1.880 |
| 2007 |
103.5 |
1.907 |
| 2008 |
102.5 |
1.935 |
| 2009 |
101.6 |
1.963 |
| 2010 |
100.7 |
1.990 |
| 2011 |
99.8 |
2.017 |
| 2012 |
98.9 |
2.043 |
| 2013 |
98.1 |
2.070 |
| 2014 |
97.3 |
2.095 |
| 2015 |
96.5 |
2.121 |
| 2016 |
95.7 |
2.146 |
| 2017 |
94.9 |
2.171 |
| 2018 |
94.2 |
2.195 |
| 2019 |
93.4 |
2.219 |
| 2020 |
92.7 |
2.243 |
| 2021 |
92.0 |
2.266 |
| 2022 |
91.3 |
2.289 |
| 2023 |
90.7 |
2.311 |
| 2024 |
90.0 |
2.333 |
| 2025 |
89.3 |
2.355 |
| 2026 |
88.7 |
2.375 |
| 2027 |
88.1 |
2.396 |
| 2028 |
87.5 |
2.416 |
| 2029 |
86.9 |
2.436 |
| 2030 |
86.3 |
2.455 |
| 2031 |
85.7 |
2.473 |
| 2032 |
85.1 |
2.491 |
| 2033 |
84.5 |
2.509 |
| 2034 |
84.0 |
2.526 |
| 2035 |
83.4 |
2.542 |
| 2036 |
82.9 |
2.558 |
| 2037 |
82.3 |
2.574 |
| 2038 |
81.8 |
2.588 |
| 2039 |
81.3 |
2.603 |
| 2040 |
80.7 |
2.617 |
| 2041 |
80.2 |
2.630 |
| 2042 |
79.7 |
2.642 |
| 2043 |
79.2 |
2.655 |
| 2044 |
78.7 |
2.666 |
| 2045 |
78.2 |
2.677 |
| 2046 |
77.7 |
2.687 |
| 2047 |
77.2 |
2.697 |
| 2048 |
76.7 |
2.706 |
| 2049 |
76.2 |
2.715 |
| 2050 |
75.8 |
2.723 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
