20176+2622 BU 984 (HD 193095)
20h 17m 34.66s +26° 22' 13.0" P.A. 160.00 sep 0.2 mag 8.22,9.39 Sp F8
Coord 2000 |
20176+2622 |
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Discov num |
BU 984 |
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Comp |
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Coord arcsec 2000 |
20 17 34.66 +26 22 13.0 |
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Date first |
1880 |
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Date last |
2012 |
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Obs |
102 |
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Pa first |
204 |
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Pa last |
159.7 |
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P.A. Now (θ) |
159.7° |
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Sep first |
0.9 |
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Sep last |
0.161 |
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Sep. Now (ρ) |
0.161" |
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Mag pri |
8.22 |
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Mag sec |
9.39 |
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delta mag (ΔM) |
1.17 |
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Spectral class |
F8 (yellow-white) |
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Pri motion ra |
-008 |
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Sec motion ra |
-008 |
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Pri motion dec |
-078 |
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Sec motion dec |
-078 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 193095 |
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Constellation |
Vulpecula |
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SAO |
88471 |
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Tycho2 |
2163-00157-1 |
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Gaia DR2 |
1835491008821431296 |
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HD |
193095 |
|
ADS |
13649 |
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ORBITAL ELEMENTS
Period (P) | 286.5759y | ± 28.928 |
Periastron (T) | 2080.014y | ± 9.62 |
Semi-major axis (a) | 0.8a | ± 0.0523 |
Eccentricity (e) | 0.0885 | ± 0.0774 |
Inclination (i) | 70.19° | ± 7.45 |
Longitude of periastron (ω) | 2.98° | ± 14.6 |
Node (Ω) | 43.99° | ± 3.16 |
Notes | | |
Reference | Pop2000a | |
Equinox | 2000 | |
Last observation | 1994 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
271.5 |
0.360 |
2001 |
273.6 |
0.349 |
2002 |
275.9 |
0.339 |
2003 |
278.3 |
0.330 |
2004 |
280.9 |
0.321 |
2005 |
283.6 |
0.313 |
2006 |
286.5 |
0.305 |
2007 |
289.5 |
0.298 |
2008 |
292.6 |
0.291 |
2009 |
295.9 |
0.285 |
2010 |
299.3 |
0.281 |
2011 |
302.8 |
0.277 |
2012 |
306.3 |
0.273 |
2013 |
310.0 |
0.271 |
2014 |
313.7 |
0.270 |
2015 |
317.4 |
0.270 |
2016 |
321.1 |
0.271 |
2017 |
324.8 |
0.273 |
2018 |
328.4 |
0.276 |
2019 |
331.9 |
0.280 |
2020 |
335.3 |
0.284 |
2021 |
338.6 |
0.290 |
2022 |
341.8 |
0.296 |
2023 |
344.8 |
0.303 |
2024 |
347.7 |
0.311 |
2025 |
350.4 |
0.319 |
2026 |
353.0 |
0.328 |
2027 |
355.5 |
0.337 |
2028 |
357.8 |
0.347 |
2029 |
|
0.357 |
2030 |
2.1 |
0.367 |
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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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