20176+2622 BU  984

 
 
20h 17m 34.66s +26 22' 13.0" P.A. 331.9 sep 0.28 mag 8.22,9.39 Sp F8
 
 
Coord 2000
20176+2622
Discov num
BU  984
Comp
Coord arcsec 2000
20 17 34.66 +26 22 13.0
Date first
1880
Date last
2007
Obs
100
Pa first
204
Pa last
295
P.A. Now (θ)
331.9°
Sep first
0.9
Sep last
0.2
Sep. Now (ρ)
0.28"
Mag pri
8.22
Mag sec
9.39
delta mag (ΔM)
1.17
Spectral class
F8 (yellow-white)
Pri motion ra
-008
Sec motion ra
-008
Pri motion dec
-078
Sec motion dec
-078
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
295.3
Precise sep
0.184
Constellation
Vulpecula
SAO
88471
Tycho2
2163-00157-1
Gaia DR2
08821431296
HD
193095
ADS
13649
last precise pa
295.3
last precise sep
0.184
 
 
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 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1994
label rho theta
2000 0.360 271.5
2001 0.349 273.6
2002 0.339 275.9
2003 0.330 278.3
2004 0.321 280.9
2005 0.313 283.6
2006 0.305 286.5
2007 0.298 289.5
2008 0.291 292.6
2009 0.285 295.9
2010 0.281 299.3
2011 0.277 302.8
2012 0.273 306.3
2013 0.271 310.0
2014 0.270 313.7
2015 0.270 317.4
2016 0.271 321.1
2017 0.273 324.8
2018 0.276 328.4
2019 0.280 331.9
2020 0.284 335.3
2021 0.290 338.6
2022 0.296 341.8
2023 0.303 344.8
2024 0.311 347.7
2025 0.319 350.4
2026 0.328 353.0
2027 0.337 355.5
2028 0.347 357.8
2029 0.357
2030 0.367 2.1

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
 
grafico orbita






wds20176%2B2622a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20176+2622 BU 984 2003 100 279 0.3 8.22 9.39 F8 O 201734.66+262213.0
20176+2622 BU 984 2006 102 291 0.2 8.22 9.39 F8 O 201734.66+262213.0
20176+2622 BU 984 2007 103 295 0.2 8.22 9.39 F8 O 201734.66+262213.0

If you need more information about this double, apply for a data request form to the WDS.