20169+5017 ENG  73AB

 
 
20h 16m 54.53s +50 16' 43.4" P.A. 74.00 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 W 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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 32429 20 16 55 +50 16 43 ENG 73 AB 2015 16 74 81.4 8.24 10.30 2.06 Y <===
Show 32429 20 16 55 +50 16 43 ENG 73 AC 2003 10 158 92.7 8.24 11.00 2.76
Show 32429 20 16 55 +50 16 43 ENG 73 AD 2003 11 340 122.5 8.24 10.61 2.37
Show 32429 20 16 55 +50 16 43 ENG 73 AE 2003 11 118 162.5 8.24 12.30 4.06
Show 32429 20 16 55 +50 16 43 GIC 155 AF 2015 6 287 105.9 8.24 12.99 4.75
Show 32429 20 16 55 +50 16 43 MET 89 AH 2003 1 67 4.2 6.40 18.60 12.20
Show 32429 20 16 55 +50 16 43 MET 89 AI 2003 1 44 8.7 6.40 16.94 10.54
Show 32429 20 16 55 +50 16 43 MET 89 AJ 2004 1 326 11.3 6.40 18.49 12.09
Show 32429 20 16 55 +50 16 43 MET 89 AK 2003 1 232 11.7 6.40 18.41 12.01
Show 32429 20 17 02 +50 17 03 BUP 243 BG 2015 10 193 10.5 10.30 11.04 0.74
Show 32429 20 16 50 +50 18 38 BUP 243 DF 2015 15 216 105.9 10.61 12.99 2.38
Show 32429 20 16 44 +50 17 14 RAO 70 FL 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
2085008267746614912
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 0.003 206.4
2001 0.002 281.2
2002 0.003 338.6
2003 0.003 8.5
2004 0.003 49.2
2005 0.003 114.1
2006 0.004 154.1
2007 0.004 179.5
2008 0.003 215.1
2009 0.002 296.0
2010 0.003 344.4
2011 0.003 14.1
2012 0.002 59.8
2013 0.003 123.5
2014 0.004 158.9
2015 0.004 184.2
2016 0.002 225.7
2017 0.002 308.5
2018 0.003 349.8
2019 0.003 20.1
2020 0.002 71.4
2021 0.003 131.7
2022 0.004 163.5
2023 0.003 189.3
2024 0.002 238.7
2025 0.003 318.7
2026 0.004 354.9
2027 0.003 26.7
2028 0.002 83.6
2029 0.003 138.8
2030 0.004 167.9


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



 
 


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

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