17248+3044 BU 1250
17h 24m 49.67s +30° 44' 24.0" P.A. 118.00 sep 1.9 mag 10.83,11.13
| Coord 2000 |
17248+3044 |
|
Discov num |
BU 1250 |
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Comp |
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Coord arcsec 2000 |
17 24 49.67 +30 44 24.0 |
|
| Date first |
1877 |
|
Date last |
2015 |
|
Obs |
72 |
|
| Pa first |
58 |
|
Pa last |
118.4 |
|
P.A. Now (θ) |
118.4° |
|
| Sep first |
1.9 |
|
Sep last |
1.86 |
|
Sep. Now (ρ) |
1.86" |
|
| Mag pri |
10.83 |
|
Mag sec |
11.13 |
|
delta mag (ΔM) |
0.3 |
|
Spectral class |
|
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| Pri motion ra |
-002 |
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Sec motion ra |
-002 |
|
| Pri motion dec |
+005 |
|
Sec motion dec |
+005 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
Tycho2 |
2605-01859-1 |
|
Gaia DR2 |
4599961243043438464 |
|
ADS |
10540 |
|
ORBITAL ELEMENTS
| Period (P) | 2028.8565y | ± 959.0983 |
Periastron (T) | 1724.6173y | ± 344.339 |
Semi-major axis (a) | 7.80753a | ± 4.17288 |
| Eccentricity (e) | 0.78277 | ± 0.15889 |
Inclination (i) | 76.924° | ± 7.108 |
Longitude of periastron (ω) | 306.129° | ± 49.855 |
| Node (Ω) | 23.435° | ± 32.187 |
Notes | | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
112.7 |
1.854 |
| 2001 |
113.2 |
1.858 |
| 2002 |
113.6 |
1.862 |
| 2003 |
114.1 |
1.866 |
| 2004 |
114.5 |
1.870 |
| 2005 |
114.9 |
1.875 |
| 2006 |
115.4 |
1.879 |
| 2007 |
115.8 |
1.884 |
| 2008 |
116.2 |
1.888 |
| 2009 |
116.7 |
1.893 |
| 2010 |
117.1 |
1.898 |
| 2011 |
117.5 |
1.903 |
| 2012 |
117.9 |
1.908 |
| 2013 |
118.3 |
1.913 |
| 2014 |
118.8 |
1.918 |
| 2015 |
119.2 |
1.923 |
| 2016 |
119.6 |
1.928 |
| 2017 |
120.0 |
1.934 |
| 2018 |
120.4 |
1.939 |
| 2019 |
120.8 |
1.945 |
| 2020 |
121.2 |
1.950 |
| 2021 |
121.6 |
1.956 |
| 2022 |
122.0 |
1.962 |
| 2023 |
122.4 |
1.968 |
| 2024 |
122.8 |
1.974 |
| 2025 |
123.2 |
1.980 |
| 2026 |
123.6 |
1.986 |
| 2027 |
123.9 |
1.992 |
| 2028 |
124.3 |
1.998 |
| 2029 |
124.7 |
2.005 |
| 2030 |
125.1 |
2.011 |
|
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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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