20583+4428 RBR  50

 
 
20h 58m 19.38s +44 28' 17.5" P.A. 76 sep 0.4 mag 5.50,11.00 Sp K0III dist. 79.3 pc (258.68 l.y.)
 
 
Coord 2000
20583+4428
Discov num
RBR  50
Comp
Coord arcsec 2000
20 58 19.38 +44 28 17.5
Date first
2003
Date last
2003
Obs
1
Pa first
76
Pa last
76
P.A. Now (θ)
76°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.4"
Mag pri
5.50
Mag sec
11.00
delta mag (ΔM)
5.5
Spectral class
K0III (yellow-orange)
Pri motion ra
+102
Sec motion ra
Pri motion dec
+070
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
75.6
Precise sep
0.41
Constellation
Cygnus
SAO
50298
HIP
103519
Tycho2
3179-00564-1
Gaia DR2
91519784192
HD
199870
HR
8035
BD
BD+43 3777
Distance
79.3
Distance ly
258.68
last precise pa
75.6
last precise sep
0.41
 
 
ORBITAL ELEMENTS
 
 
Period (P)635.1d Periastron (T)39186.1d (1966.164y) Semi-major axis (a)7.48m± 0.64
Eccentricity (e)0.44 Inclination (i)32.4°± 2.4 Longitude of periastron (ω)148.1°
Node (Ω)306.2°± 4 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation1992
label rho theta
2000-01-01 0.010 272.5
2001-01-01 0.004 127.8
2002-01-01 0.010 293.9
2003-01-01 0.006 210.9
2004-01-01 0.009 319.0
2005-01-01 0.009 251.4
2006-01-01 0.005 14.3
2007-01-01 0.010 276.2
2008-01-01 0.005 146.6
2009-01-01 0.010 297.6
2010-01-01 0.007 219.9
2011-01-01 0.008 324.7
2012-01-01 0.009 256.3
2013-01-01 0.004 34.4
2014-01-01 0.010 279.9
2015-01-01 0.005 163.2
2016-01-01 0.010 301.5
2017-01-01 0.007 227.8
2018-01-01 0.007 331.3
2019-01-01 0.009 260.8
2020-01-01 0.004 59.0
2021-01-01 0.010 283.6
2022-01-01 0.005 177.9
2023-01-01 0.010 305.6
2024-01-01 0.008 234.9
2025-01-01 0.007 339.1
2026-01-01 0.010 265.1
2027-01-01 0.004 85.2
2028-01-01 0.010 287.2
2029-01-01 0.006 190.8
2030-01-01 0.009 309.9

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

grafico orbita





wds20583%2B4428s.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
20583+4428 RBR 50 2003 1 76 0.4 5.50 11.00 K0III N 205819.38+442817.5

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