20169+5017 ENG  73AB

 
 
20h 16m 54.53s +50 16' 43.4" P.A. 74 sep 81.4 mag 8.24,10.30 Sp G5 dist. 30.77 pc (100.37 l.y.)
 
 
Coord 2000
20169+5017
Discov num
ENG  73
Comp
AB
Coord arcsec 2000
20 16 54.53 +50 16 43.4
Date first
1892
Date last
2015
Obs
16
Pa first
96
Pa last
74
P.A. Now (θ)
74°
Sep first
54.5
Sep last
81.4
Sep. Now (ρ)
81.4"
Mag pri
8.24
Mag sec
10.30
delta mag (ΔM)
2.06
Spectral class
G5 (yellow)
Pri motion ra
-222
Sec motion ra
-022
Pri motion dec
-215
Sec motion dec
+004
Notes
N L U (See Notes, Linear solution, Proper motion indicates non-physical)
rPM=0.96
This double is not physical.
 
 
20169+5017 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20169+5017 ENG 73 AB 1892 2015 16 74 81.4 8.24 10.30 2.06 Y <===
Show 20169+5017 ENG 73 AC 1892 2003 10 158 92.7 8.24 11.00 2.76
Show 20169+5017 ENG 73 AD 1892 2003 11 340 122.5 8.24 10.61 2.37
Show 20169+5017 ENG 73 AE 1892 2003 11 118 162.5 8.24 12.30 4.06
Show 20169+5017 GIC 155 AF 1954 2015 6 287 105.9 8.24 12.99 4.75
Show 20169+5017 MET 89 AH 2003 2003 1 67 4.2 6.40 18.60 12.20
Show 20169+5017 MET 89 AI 2003 2003 1 44 8.7 6.40 16.94 10.54
Show 20169+5017 MET 89 AJ 2004 2004 1 326 11.3 6.40 18.49 12.09
Show 20169+5017 MET 89 AK 2003 2003 1 232 11.7 6.40 18.41 12.01
Show 20169+5017 BUP 243 BG 1908 2015 6 193 10.6 10.30 11.04 0.74
Show 20169+5017 BUP 243 DF 1908 2003 3 215 103.8 10.61 12.99 2.38
Show 20169+5017 RAO 70 FL 2000 2015 4 266 15.1 12.99 16.40 3.41
12-fold system
12 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
73.9
Precise sep
81.427
Constellation
Cygnus
SAO
32429
HIP
99965
Tycho2
3580-00583-1
Gaia DR2
67746614912
HD
193216
BD
BD+49 3245
Distance
30.77
Distance ly
100.37
last precise pa
73.9
last precise sep
81.427
 
 
ORBITAL ELEMENTS
 
 
Period (P)418.77d Periastron (T)50218d (1996.368y) Semi-major axis (a)3.7m± 0.8
Eccentricity (e)0.084 Inclination (i)124.9°± 12.1 Longitude of periastron (ω)243°
Node (Ω)174.1°± 8.6 Note Grade9(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000-01-01 0.003 206.4
2001-01-01 0.002 281.2
2002-01-01 0.003 338.6
2003-01-01 0.003 8.5
2004-01-01 0.003 49.2
2005-01-01 0.003 114.1
2006-01-01 0.004 154.1
2007-01-01 0.004 179.5
2008-01-01 0.003 215.1
2009-01-01 0.002 296.0
2010-01-01 0.003 344.4
2011-01-01 0.003 14.1
2012-01-01 0.002 59.8
2013-01-01 0.003 123.5
2014-01-01 0.004 158.9
2015-01-01 0.004 184.2
2016-01-01 0.002 225.7
2017-01-01 0.002 308.5
2018-01-01 0.003 349.8
2019-01-01 0.003 20.1
2020-01-01 0.002 71.4
2021-01-01 0.003 131.7
2022-01-01 0.004 163.5
2023-01-01 0.003 189.3
2024-01-01 0.002 238.7
2025-01-01 0.003 318.7
2026-01-01 0.004 354.9
2027-01-01 0.003 26.7
2028-01-01 0.002 83.6
2029-01-01 0.003 138.8
2030-01-01 0.004 167.9

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






wds20169%2B5017f.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
20169+5017 ENG 73 AB 2004 13 76 78.2 8.24 10.30 G5 NLD 201654.53+501643.4
20169+5017 ENG 73 AB 2012 15 74 81.0 8.24 10.30 G5 NLD 201654.53+501643.4
20169+5017 ENG 73 AB 2015 16 74 81.4 8.24 10.30 G5 NL U 201654.53+501643.4

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