20329+4154 BLA   8

 
 
20h 32m 51.64s +41 53' 54.5" P.A. 336.00 mag 7.40,9.10 Sp G9V dist. 22.05 pc (71.93 l.y.)
 
 
Coord 2000
20329+4154
Discov num
BLA   8
Comp
Coord arcsec 2000
20 32 51.64 +41 53 54.5
Date first
1986
Date last
2014
Obs
5
Pa first
167
Pa last
336
P.A. Now (θ)
336°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0"
Mag pri
7.40
Mag sec
9.10
delta mag (ΔM)
1.7
Spectral class
G9V (yellow)
Pri motion ra
-153
Sec motion ra
Pri motion dec
+457
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
336.3
Precise sep
0.013
Constellation
Cygnus
SAO
49769
HIP
101382
Tycho2
3161-00779-1
HD
195987
GL
Gl 793.1
BD
BD+41 3799
Distance
22.05
Distance ly
71.93
last precise pa
336.3
last precise sep
0.013
 
 
ORBITAL ELEMENTS
 
 
Period (P)57.322d± 0.0002 Periastron (T)51353.81d (1999.478y)± 0.04 Semi-major axis (a)15.2m± 0.3
Eccentricity (e)0.306± 0.001 Inclination (i)100°± 6.3 Longitude of periastron (ω)357.4°± 0.3
Node (Ω)330.9°± 3.6 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1991
label rho theta
2000 0.014 159.1
2001 0.014 142.5
2002 0.008 321.3
2003 0.019 153.5
2004 0.005 118.6
2005 0.003 197.3
2006 0.019 149.4
2007 0.007 342.9
2008 0.013 161.1
2009 0.015 144.2
2010 0.010 325.7
2011 0.018 154.5
2012 0.007 129.8
2013 0.002 244.4
2014 0.020 150.3
2015 0.005 351.9
2016 0.011 163.7
2017 0.017 145.6
2018 0.010 329.1
2019 0.017 155.6
2020 0.009 135.6
2021 0.003 291.2
2022 0.020 151.2
2023 0.003 12.2
2024 0.009 167.6
2025 0.018 146.8
2026 0.010 332.4
2027 0.016 156.8
2028 0.011 139.1
2029 0.005 310.0
2030 0.020 152.1


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



 
 


wds20329%2B4154a.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
20329+4154 BLA 8 1986 1 170 0.0 7.09   G9V NO 203251.64+415354.5
20329+4154 BLA 8 2007 2 296 0.0 7.09   G9V NOD 203251.64+415354.5
20329+4154 BLA 8 2014 5 336 0.0 7.40 9.10 G9V NO 203251.64+415354.5

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