11239+1032 STF 1536 AB (Tsze tseang)
11h 23m 55.37s +10° 31' 46.9" P.A. 92.00 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 |
2021 |
|
Obs |
555 |
|
| Pa first |
95 |
|
Pa last |
91.7 |
|
P.A. Now (θ) |
90.1° |
|
| Sep first |
3.0 |
|
Sep last |
2.275 |
|
Sep. Now (ρ) |
2.284" |
|
| 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 |
2021 |
555 |
92 |
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) | 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 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2014 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
111.7 |
1.700 |
| 2001 |
110.4 |
1.728 |
| 2002 |
109.2 |
1.756 |
| 2003 |
108.0 |
1.783 |
| 2004 |
106.9 |
1.811 |
| 2005 |
105.8 |
1.838 |
| 2006 |
104.7 |
1.865 |
| 2007 |
103.6 |
1.893 |
| 2008 |
102.6 |
1.919 |
| 2009 |
101.6 |
1.946 |
| 2010 |
100.7 |
1.972 |
| 2011 |
99.7 |
1.998 |
| 2012 |
98.8 |
2.024 |
| 2013 |
97.9 |
2.050 |
| 2014 |
97.1 |
2.075 |
| 2015 |
96.2 |
2.100 |
| 2016 |
95.4 |
2.124 |
| 2017 |
94.6 |
2.148 |
| 2018 |
93.8 |
2.172 |
| 2019 |
93.0 |
2.195 |
| 2020 |
92.3 |
2.218 |
| 2021 |
91.5 |
2.241 |
| 2022 |
90.8 |
2.263 |
| 2023 |
90.1 |
2.284 |
| 2024 |
89.4 |
2.306 |
| 2025 |
88.7 |
2.326 |
| 2026 |
88.0 |
2.347 |
| 2027 |
87.4 |
2.366 |
| 2028 |
86.7 |
2.386 |
| 2029 |
86.1 |
2.405 |
| 2030 |
85.4 |
2.423 |
| 2031 |
84.8 |
2.441 |
| 2032 |
84.2 |
2.458 |
| 2033 |
83.6 |
2.475 |
| 2034 |
83.0 |
2.491 |
| 2035 |
82.4 |
2.507 |
| 2036 |
81.8 |
2.522 |
| 2037 |
81.2 |
2.537 |
| 2038 |
80.7 |
2.551 |
| 2039 |
80.1 |
2.564 |
| 2040 |
79.6 |
2.577 |
| 2041 |
79.0 |
2.590 |
| 2042 |
78.5 |
2.602 |
| 2043 |
77.9 |
2.613 |
| 2044 |
77.4 |
2.623 |
| 2045 |
76.8 |
2.633 |
| 2046 |
76.3 |
2.643 |
| 2047 |
75.8 |
2.651 |
| 2048 |
75.3 |
2.659 |
| 2049 |
74.7 |
2.667 |
| 2050 |
74.2 |
2.674 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
