20311-1503 FIN 336

 
 
20h 31m 04.33s -15 03' 21.8" P.A. 328.6 sep 0.14 mag 6.80,7.00 Sp gG5 dist. 116.82 pc (381.07 l.y.)
 
 
Coord 2000
20311-1503
Discov num
FIN 336
Comp
Coord arcsec 2000
20 31 04.33 -15 03 21.8
Date first
1954
Date last
2017
Obs
41
Pa first
297
Pa last
322
P.A. Now (θ)
328.6°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.14"
Mag pri
6.80
Mag sec
7.00
delta mag (ΔM)
0.2
Spectral class
gG5
Pri motion ra
-038
Sec motion ra
Pri motion dec
-046
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
321.7
Precise sep
0.135
Constellation
Capricornus
SAO
163645
HIP
101221
Tycho2
6329-02134-1
Gaia DR2
90936208256
HD
195330
HR
7837
BD
BD-15 5696
Distance
116.82
Distance ly
381.07
last precise pa
321.7
last precise sep
0.135
 
 
ORBITAL ELEMENTS
 
 
Period (P)50.66y Periastron (T)1949.71y Semi-major axis (a)0.168a
Eccentricity (e)0.656 Inclination (i)68.3° Longitude of periastron (ω)81.4°
Node (Ω)106.4° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2017
label rho theta
2000 0.032 144.6
2001 0.029 239.5
2002 0.061 271.3
2003 0.089 281.4
2004 0.109 287.1
2005 0.123 291.3
2006 0.134 294.6
2007 0.142 297.6
2008 0.147 300.3
2009 0.150 302.8
2010 0.152 305.2
2011 0.153 307.6
2012 0.153 310.0
2013 0.152 312.4
2014 0.150 314.9
2015 0.148 317.4
2016 0.145 320.0
2017 0.142 322.8
2018 0.138 325.6
2019 0.135 328.6
2020 0.131 331.8
2021 0.127 335.2
2022 0.123 338.8
2023 0.119 342.6
2024 0.116 346.7
2025 0.112 351.0
2026 0.109 355.6
2027 0.106 0.4
2028 0.104 5.5
2029 0.102 10.8
2030 0.101 16.2

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






wds20311-1503e.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
20311-1503 FIN 336 1996 29 284 0.1 6.80 7.00 gG5 OD 203104.33-150321.8
20311-1503 FIN 336 2008 32 123 0.2 6.80 7.00 gG5 OD 203104.33-150321.8
20311-1503 FIN 336 2009 37 125 0.2 6.80 7.00 gG5 OD 203104.33-150321.8
20311-1503 FIN 336 2013 39 133 0.1 6.80 7.00 gG5 O 203104.33-150321.8
20311-1503 FIN 336 2017 41 322 0.1 6.80 7.00 gG5 O 203104.33-150321.8

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