20251+5936 A   730

 
 
20h 25m 05.00s +59 36' 00.4" P.A. 245.4 sep 0.11 mag 6.94,7.63 Sp A2IV dist. 251.26 pc (819.61 l.y.)
 
 
Coord 2000
20251+5936
Discov num
A   730
Comp
Coord arcsec 2000
20 25 05.00 +59 36 00.4
Date first
1904
Date last
2008
Obs
64
Pa first
314
Pa last
284
P.A. Now (θ)
245.4°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.11"
Mag pri
6.94
Mag sec
7.63
delta mag (ΔM)
0.69
Spectral class
A2IV (white)
Pri motion ra
-002
Sec motion ra
Pri motion dec
-005
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
283.9
Precise sep
0.157
Constellation
Cygnus
SAO
32562
HIP
100714
Tycho2
3949-02016-1
Gaia DR2
98775572096
HD
194882
HR
7818
ADS
13850
BD
BD+59 2228
Distance
251.26
Distance ly
819.61
last precise pa
283.9
last precise sep
0.157
 
 
ORBITAL ELEMENTS
 
 
Period (P)175.089y Periastron (T)2038.638y Semi-major axis (a)0.231a
Eccentricity (e)0.005 Inclination (i)118.5° Longitude of periastron (ω)309.2°
Node (Ω)152.2° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.172 303.3
2001 0.168 301.5
2002 0.164 299.6
2003 0.159 297.6
2004 0.155 295.4
2005 0.151 293.2
2006 0.146 290.8
2007 0.142 288.3
2008 0.138 285.6
2009 0.134 282.8
2010 0.130 279.8
2011 0.127 276.6
2012 0.123 273.3
2013 0.120 269.7
2014 0.118 266.0
2015 0.115 262.2
2016 0.113 258.1
2017 0.112 254.0
2018 0.111 249.8
2019 0.110 245.4
2020 0.110 241.1
2021 0.110 236.8
2022 0.111 232.5
2023 0.112 228.3
2024 0.114 224.2
2025 0.116 220.2
2026 0.119 216.4
2027 0.122 212.8
2028 0.125 209.4
2029 0.128 206.1
2030 0.132 203.0

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






wds20251%2B5936b.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
20251+5936 A 730 2004 62 293 0.2 6.94 7.63 A2IV NO 202505.00+593600.4
20251+5936 A 730 2008 64 284 0.2 6.94 7.63 A2IV NO 202505.00+593600.4
20251+5936 A 730 2009 64 274 0.2 6.94 7.63 A2IV NO 202505.00+593600.4

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