20306+1349 HDS2932

 
 
20h 30m 33.47s +13 49' 02.4" P.A. 324.7 sep 0.16 mag 8.61,9.23 Sp F8 dist. 91.24 pc (297.62 l.y.)
 
 
Coord 2000
20306+1349
Discov num
HDS2932
Comp
Coord arcsec 2000
20 30 33.47 +13 49 02.4
Date first
1991
Date last
2018
Obs
9
Pa first
325
Pa last
317
P.A. Now (θ)
324.7°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.16"
Mag pri
8.61
Mag sec
9.23
delta mag (ΔM)
0.62
Spectral class
F8 (yellow-white)
Pri motion ra
+011
Sec motion ra
Pri motion dec
-014
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
317.4
Precise sep
0.146
Constellation
Delphinus
SAO
106180
HIP
101181
Tycho2
1099-01401-1
Gaia DR2
57532613632
HD
195397
BD
BD+13 4415
Distance
91.24
Distance ly
297.62
last precise pa
317.4
last precise sep
0.146
 
 
ORBITAL ELEMENTS
 
 
Period (P)26.1y± 0.6 Periastron (T)2006.12y± 0.09 Semi-major axis (a)122.4m± 3.9
Eccentricity (e)0.829± 0.011 Inclination (i)66.9°± 1.6 Longitude of periastron (ω)309.5°± 2.5
Node (Ω)170.5°± 2 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.156 336.7
2001 0.148 338.7
2002 0.136 341.0
2003 0.119 343.7
2004 0.096 347.7
2005 0.061 355.1
2006 0.009 102.9
2007 0.033 203.5
2008 0.036 242.9
2009 0.047 270.3
2010 0.060 286.5
2011 0.075 296.6
2012 0.088 303.5
2013 0.102 308.5
2014 0.114 312.5
2015 0.125 315.7
2016 0.134 318.4
2017 0.143 320.7
2018 0.151 322.8
2019 0.157 324.7
2020 0.162 326.5
2021 0.165 328.2
2022 0.167 329.9
2023 0.167 331.5
2024 0.166 333.1
2025 0.163 334.8
2026 0.157 336.6
2027 0.149 338.5
2028 0.137 340.7
2029 0.121 343.4
2030 0.098 347.2

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






wds20306%2B1349a.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
20306+1349 HDS2932 1997 2 330 0.2 8.61 9.23 F8 203033.47+134902.4
20306+1349 HDS2932 2004 3 357 0.1 8.61 9.23 F8 203033.47+134902.4
20306+1349 HDS2932 2008 6 259 0.0 8.61 9.23 F8 D 203033.47+134902.4
20306+1349 HDS2932 2015 7 309 0.1 8.61 9.23 F8 O 203033.47+134902.4
20306+1349 HDS2932 2017 8 316 0.1 8.61 9.23 F8 O 203033.47+134902.4

If you need more information about this double, apply for a data request form to the WDS.