11279-0142 RST 4944 (HD 99651)
11h 27m 53.73s -01° 41' 59.8" P.A. 182.00 sep 0.1 mag 6.62,8.22 Sp gK2 dist. 161.03 pc (525.28 l.y.)
| Coord 2000 |
11279-0142 |
|
Discov num |
RST4944 |
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Comp |
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Coord arcsec 2000 |
11 27 53.73 -01 41 59.8 |
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| Date first |
1943 |
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Date last |
2021 |
|
Obs |
34 |
|
| Pa first |
331 |
|
Pa last |
182.4 |
|
P.A. Now (θ) |
167.9° |
|
| Sep first |
0.3 |
|
Sep last |
0.099 |
|
Sep. Now (ρ) |
0.086" |
|
| Mag pri |
6.62 |
|
Mag sec |
8.22 |
|
delta mag (ΔM) |
1.6 |
|
Spectral class |
gK2 |
|
| Pri motion ra |
-034 |
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Sec motion ra |
|
|
| Pri motion dec |
+000 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 99651 |
|
Constellation |
Leo |
|
SAO |
138216 |
|
HIP |
55941 |
|
| Tycho2 |
4923-00979-1 |
|
Gaia DR2 |
3796597059252894848 |
|
HD |
99651 |
|
HR |
4419 |
|
| GC |
15728 |
|
BD |
BD-00 2442 |
|
Distance |
161.03 |
|
Distance ly |
525.28 |
|
ORBITAL ELEMENTS
| Period (P) | 120.5y | ± 18.9 |
Periastron (T) | 2025.58y | ± 0.42 |
Semi-major axis (a) | 0.215a | ± 0.012 |
| Eccentricity (e) | 0.64 | ± 0.05 |
Inclination (i) | 134.8° | ± 6.5 |
Longitude of periastron (ω) | 51.7° | ± 6.2 |
| Node (Ω) | 174.4° | ± 5.6 |
Notes | | |
Reference | Tok2021f | |
| Equinox | | |
Last observation | 2021 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
267.8 |
0.186 |
| 2001 |
265.6 |
0.182 |
| 2002 |
263.3 |
0.178 |
| 2003 |
260.9 |
0.174 |
| 2004 |
258.4 |
0.170 |
| 2005 |
255.7 |
0.166 |
| 2006 |
252.9 |
0.162 |
| 2007 |
250.0 |
0.158 |
| 2008 |
246.9 |
0.154 |
| 2009 |
243.6 |
0.150 |
| 2010 |
240.2 |
0.146 |
| 2011 |
236.6 |
0.142 |
| 2012 |
232.8 |
0.138 |
| 2013 |
228.8 |
0.134 |
| 2014 |
224.5 |
0.131 |
| 2015 |
220.0 |
0.127 |
| 2016 |
215.2 |
0.123 |
| 2017 |
210.1 |
0.119 |
| 2018 |
204.7 |
0.115 |
| 2019 |
198.8 |
0.110 |
| 2020 |
192.4 |
0.105 |
| 2021 |
185.2 |
0.100 |
| 2022 |
177.2 |
0.093 |
| 2023 |
167.9 |
0.086 |
| 2024 |
156.6 |
0.077 |
| 2025 |
142.5 |
0.069 |
| 2026 |
124.7 |
0.062 |
| 2027 |
103.5 |
0.058 |
| 2028 |
81.8 |
0.060 |
| 2029 |
63.1 |
0.067 |
| 2030 |
48.6 |
0.078 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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