20330+4950 MCA  61AB

 
 
20h 32m 59.04s +49 50' 28.3" P.A. 250.7 sep 0.13 mag 6.70, Sp A0+G dist. 458.72 pc (1496.34 l.y.)
 
 
Coord 2000
20330+4950
Discov num
MCA  61
Comp
AB
Coord arcsec 2000
20 32 59.04 +49 50 28.3
Date first
1980
Date last
2006
Obs
13
Pa first
68
Pa last
233
P.A. Now (θ)
250.7°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.13"
Mag pri
6.70
Mag sec
delta mag (ΔM)
Spectral class
A0+G (white/yellow)
Pri motion ra
-002
Sec motion ra
Pri motion dec
+005
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
20330+4950 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20330+4950 MCA 61 AB 1980 2006 13 251 0.1 6.70 Y <===
Show 20330+4950 RBR 49 AC 2003 2004 2 136 4.3 6.70 15.00 8.30
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
232.8
Precise sep
0.108
Constellation
Cygnus
SAO
49782
HIP
101398
Tycho2
3581-01342-1
Gaia DR2
06262367104
HD
196088
BD
BD+49 3310
Distance
458.72
Distance ly
1496.34
last precise pa
232.8
last precise sep
0.108
 
 
ORBITAL ELEMENTS
 
 
Period (P)184.75y± 33.29 Periastron (T)1986.09y± 0.66 Semi-major axis (a)0.133a± 0.016
Eccentricity (e)0.612± 0.045 Inclination (i)46°± 3.8 Longitude of periastron (ω)266.7°± 4.8
Node (Ω)219.5°± 4.5 Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation2006
label rho theta
2000 0.088 220.6
2001 0.091 223.0
2002 0.094 225.2
2003 0.097 227.3
2004 0.100 229.2
2005 0.103 231.1
2006 0.105 232.8
2007 0.108 234.5
2008 0.110 236.1
2009 0.112 237.6
2010 0.114 239.1
2011 0.116 240.6
2012 0.118 241.9
2013 0.119 243.3
2014 0.121 244.6
2015 0.123 245.9
2016 0.124 247.1
2017 0.126 248.3
2018 0.127 249.5
2019 0.128 250.7
2020 0.129 251.8
2021 0.131 253.0
2022 0.132 254.1
2023 0.133 255.1
2024 0.134 256.2
2025 0.135 257.3
2026 0.136 258.3
2027 0.136 259.3
2028 0.137 260.3
2029 0.138 261.3
2030 0.139 262.3

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






wds20330%2B4950a.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
20330+4950 MCA 61 AB 2006 13 233 0.1 6.70   A0+G O 203259.04+495028.3

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