18411+2447 LDS 6330
18h 41m 09.83s +24° 47' 14.4" P.A. 5.00 sep 4.5 mag 13.50,16.10 Sp M4.0V+M5V
| Coord 2000 |
18411+2447 |
|
Discov num |
LDS6330 |
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Comp |
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Coord arcsec 2000 |
18 41 09.83 +24 47 14.4 |
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| Date first |
1905 |
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Date last |
2019 |
|
Obs |
12 |
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| Pa first |
12 |
|
Pa last |
5.3 |
|
P.A. Now (θ) |
5.3° |
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| Sep first |
4.1 |
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Sep last |
4.52 |
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Sep. Now (ρ) |
4.52" |
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| Mag pri |
13.50 |
|
Mag sec |
16.10 |
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delta mag (ΔM) |
2.6 |
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Spectral class |
M4.0V+M5V (red/red) |
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| Pri motion ra |
+496 |
|
Sec motion ra |
+496 |
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| Pri motion dec |
+081 |
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Sec motion dec |
+081 |
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| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
ORBITAL ELEMENTS
| Period (P) | 2116.622398y | |
Periastron (T) | 1900.653322y | |
Semi-major axis (a) | 45.49386a | |
| Eccentricity (e) | 0.913263 | |
Inclination (i) | 91.1453° | |
Longitude of periastron (ω) | 296.5406° | |
| Node (Ω) | 12.2208° | |
Notes | n | |
Reference | Kpp2020f | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
6.4 |
5.298 |
| 2001 |
6.3 |
5.245 |
| 2002 |
6.2 |
5.191 |
| 2003 |
6.1 |
5.136 |
| 2004 |
6.0 |
5.082 |
| 2005 |
5.9 |
5.027 |
| 2006 |
5.8 |
4.973 |
| 2007 |
5.7 |
4.918 |
| 2008 |
5.6 |
4.863 |
| 2009 |
5.4 |
4.808 |
| 2010 |
5.3 |
4.752 |
| 2011 |
5.2 |
4.697 |
| 2012 |
5.0 |
4.641 |
| 2013 |
4.9 |
4.586 |
| 2014 |
4.8 |
4.530 |
| 2015 |
4.6 |
4.474 |
| 2016 |
4.5 |
4.418 |
| 2017 |
4.3 |
4.362 |
| 2018 |
4.2 |
4.305 |
| 2019 |
4.0 |
4.249 |
| 2020 |
3.9 |
4.193 |
| 2021 |
3.7 |
4.136 |
| 2022 |
3.5 |
4.079 |
| 2023 |
3.4 |
4.023 |
| 2024 |
3.2 |
3.966 |
| 2025 |
3.0 |
3.909 |
| 2026 |
2.8 |
3.852 |
| 2027 |
2.6 |
3.795 |
| 2028 |
2.4 |
3.738 |
| 2029 |
2.2 |
3.681 |
| 2030 |
2.0 |
3.624 |
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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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