10116+1321 HU 874 (34 Leo)
10h 11m 38.19s +13° 21' 18.7" P.A. 291.00 sep 0.1 mag 6.90,7.87 Sp F6V dist. 64.6 pc (210.73 l.y.)
| Coord 2000 |
10116+1321 |
|
Discov num |
HU 874 |
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Comp |
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Coord arcsec 2000 |
10 11 38.19 +13 21 18.7 |
|
| Date first |
1905 |
|
Date last |
2021 |
|
Obs |
78 |
|
| Pa first |
289 |
|
Pa last |
291.4 |
|
P.A. Now (θ) |
271.7° |
|
| Sep first |
0.2 |
|
Sep last |
0.076 |
|
Sep. Now (ρ) |
0.043" |
|
| Mag pri |
6.90 |
|
Mag sec |
7.87 |
|
delta mag (ΔM) |
0.97 |
|
Spectral class |
F6V (yellow-white) |
|
| Pri motion ra |
+034 |
|
Sec motion ra |
|
|
| Pri motion dec |
-038 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
34 Leo |
|
Constellation |
Leo |
|
SAO |
98991 |
|
HIP |
49929 |
|
| Tycho2 |
0836-01522-1 |
|
Gaia DR2 |
3881744167420534528 |
|
HD |
88355 |
|
HR |
3998 |
|
| GC |
13999 |
|
ADS |
7674 |
|
BD |
BD+14 2217 |
|
Flamsteed |
34 Leonis |
|
| Flamsteed name |
34 Leo |
|
Distance |
64.6 |
|
Distance ly |
210.73 |
|
ORBITAL ELEMENTS
| Period (P) | 17.974y | ± 0.03 |
Periastron (T) | 2003.81y | ± 0.09 |
Semi-major axis (a) | 0.1528a | ± 0.0055 |
| Eccentricity (e) | 0.928 | ± 0.006 |
Inclination (i) | 82.4° | ± 0.8 |
Longitude of periastron (ω) | 317.9° | ± 2.6 |
| Node (Ω) | 111.6° | ± 0.6 |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
287.3 |
0.198 |
| 2001 |
287.9 |
0.175 |
| 2002 |
288.8 |
0.142 |
| 2003 |
290.6 |
0.090 |
| 2004 |
131.4 |
0.012 |
| 2005 |
271.4 |
0.042 |
| 2006 |
277.8 |
0.083 |
| 2007 |
280.2 |
0.116 |
| 2008 |
281.6 |
0.144 |
| 2009 |
282.5 |
0.168 |
| 2010 |
283.3 |
0.187 |
| 2011 |
283.9 |
0.202 |
| 2012 |
284.4 |
0.214 |
| 2013 |
284.9 |
0.221 |
| 2014 |
285.3 |
0.226 |
| 2015 |
285.8 |
0.226 |
| 2016 |
286.3 |
0.221 |
| 2017 |
286.7 |
0.212 |
| 2018 |
287.3 |
0.197 |
| 2019 |
288.0 |
0.175 |
| 2020 |
288.9 |
0.141 |
| 2021 |
290.6 |
0.088 |
| 2022 |
136.0 |
0.011 |
| 2023 |
271.7 |
0.043 |
| 2024 |
277.9 |
0.084 |
| 2025 |
280.3 |
0.117 |
| 2026 |
281.6 |
0.145 |
| 2027 |
282.5 |
0.168 |
| 2028 |
283.3 |
0.187 |
| 2029 |
283.9 |
0.202 |
| 2030 |
284.4 |
0.214 |
|
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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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