17179+4918 STF 2153 (HD 156963)
17h 17m 53.03s +49° 18' 18.5" P.A. 244.00 sep 1.6 mag 9.36,9.70 Sp K0
Coord 2000 |
17179+4918 |
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Discov num |
STF2153 |
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Comp |
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Coord arcsec 2000 |
17 17 53.03 +49 18 18.5 |
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Date first |
1831 |
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Date last |
2020 |
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Obs |
91 |
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Pa first |
282 |
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Pa last |
243.9 |
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P.A. Now (θ) |
243.9° |
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Sep first |
1.9 |
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Sep last |
1.568 |
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Sep. Now (ρ) |
1.568" |
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Mag pri |
9.36 |
|
Mag sec |
9.70 |
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delta mag (ΔM) |
0.34 |
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Spectral class |
K0 (yellow-orange) |
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Pri motion ra |
-169 |
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Sec motion ra |
-169 |
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Pri motion dec |
-029 |
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Sec motion dec |
-029 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 156963 |
|
Constellation |
Hercules |
|
SAO |
46619 |
|
Tycho2 |
3516-00944-1 |
|
Gaia DR2 |
1366264113727211392 |
|
HD |
156963 |
|
GC |
23389 |
|
ADS |
10460 |
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ORBITAL ELEMENTS
Period (P) | 1205.1832y | ± 601.7165 |
Periastron (T) | 1757.5997y | ± 103.4437 |
Semi-major axis (a) | 3.32399a | ± 1.56807 |
Eccentricity (e) | 0.66855 | ± 0.23856 |
Inclination (i) | 102.961° | ± 11.257 |
Longitude of periastron (ω) | 107.217° | ± 26.15 |
Node (Ω) | 102.94° | ± 13.021 |
Notes | | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
248.7 |
1.528 |
2001 |
248.5 |
1.524 |
2002 |
248.2 |
1.519 |
2003 |
248.0 |
1.515 |
2004 |
247.8 |
1.510 |
2005 |
247.5 |
1.506 |
2006 |
247.3 |
1.501 |
2007 |
247.0 |
1.497 |
2008 |
246.8 |
1.493 |
2009 |
246.5 |
1.488 |
2010 |
246.3 |
1.484 |
2011 |
246.0 |
1.479 |
2012 |
245.8 |
1.475 |
2013 |
245.5 |
1.470 |
2014 |
245.3 |
1.466 |
2015 |
245.0 |
1.461 |
2016 |
244.8 |
1.457 |
2017 |
244.5 |
1.453 |
2018 |
244.2 |
1.448 |
2019 |
244.0 |
1.444 |
2020 |
243.7 |
1.440 |
2021 |
243.4 |
1.435 |
2022 |
243.2 |
1.431 |
2023 |
242.9 |
1.427 |
2024 |
242.6 |
1.422 |
2025 |
242.4 |
1.418 |
2026 |
242.1 |
1.414 |
2027 |
241.8 |
1.409 |
2028 |
241.5 |
1.405 |
2029 |
241.2 |
1.401 |
2030 |
241.0 |
1.397 |
2031 |
240.7 |
1.393 |
2032 |
240.4 |
1.388 |
2033 |
240.1 |
1.384 |
2034 |
239.8 |
1.380 |
2035 |
239.5 |
1.376 |
2036 |
239.2 |
1.372 |
2037 |
238.9 |
1.368 |
2038 |
238.7 |
1.364 |
2039 |
238.4 |
1.360 |
2040 |
238.1 |
1.356 |
2041 |
237.8 |
1.352 |
2042 |
237.5 |
1.348 |
2043 |
237.1 |
1.344 |
2044 |
236.8 |
1.340 |
2045 |
236.5 |
1.336 |
2046 |
236.2 |
1.332 |
2047 |
235.9 |
1.328 |
2048 |
235.6 |
1.324 |
2049 |
235.3 |
1.320 |
2050 |
235.0 |
1.316 |
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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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