20329+4154 BLA   8

 
 
20h 32m 51.64s +41 53' 54.5" P.A. 336 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
2000-01-01 0.014 159.1
2001-01-01 0.014 142.5
2002-01-01 0.008 321.3
2003-01-01 0.019 153.5
2004-01-01 0.005 118.6
2005-01-01 0.003 197.3
2006-01-01 0.019 149.4
2007-01-01 0.007 342.9
2008-01-01 0.013 161.1
2009-01-01 0.015 144.2
2010-01-01 0.010 325.7
2011-01-01 0.018 154.5
2012-01-01 0.007 129.8
2013-01-01 0.002 244.4
2014-01-01 0.020 150.3
2015-01-01 0.005 351.9
2016-01-01 0.011 163.7
2017-01-01 0.017 145.6
2018-01-01 0.010 329.1
2019-01-01 0.017 155.6
2020-01-01 0.009 135.6
2021-01-01 0.003 291.2
2022-01-01 0.020 151.2
2023-01-01 0.003 12.2
2024-01-01 0.009 167.6
2025-01-01 0.018 146.8
2026-01-01 0.010 332.4
2027-01-01 0.016 156.8
2028-01-01 0.011 139.1
2029-01-01 0.005 310.0
2030-01-01 0.020 152.1

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






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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