20306+1349 HDS 2932 (HD 195397)

 
 
20h 30m 33.47s +13° 49' 02.4" P.A. 319.00 sep 0.2 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 2019 Obs 11
Pa first 325 Pa last 319.3 P.A. Now (θ) 319.3°
Sep first 0.1 Sep last 0.157 Sep. Now (ρ) 0.157"
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
 
 
Name HD 195397 Constellation Delphinus SAO 106180 HIP 101181
Tycho2 1099-01401-1 Gaia DR2 1804333357532613632 HD 195397 BD BD+13 4415
Distance 91.24 Distance ly 297.62
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)95y Periastron (T)1991.3y Semi-major axis (a)0.254a
Eccentricity (e)0.392 Inclination (i)82° Longitude of periastron (ω)337.3°
Node (Ω)152.2° Notes ReferenceTok2019h
Equinox2000 Last observation2019 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 161.0 0.129
2001 163.0 0.118
2002 165.5 0.106
2003 168.7 0.094
2004 172.8 0.081
2005 178.4 0.068
2006 186.6 0.056
2007 198.9 0.045
2008 217.5 0.038
2009 241.8 0.035
2010 265.1 0.039
2011 282.0 0.048
2012 293.1 0.059
2013 300.5 0.072
2014 305.6 0.085
2015 309.4 0.099
2016 312.2 0.112
2017 314.4 0.125
2018 316.2 0.139
2019 317.7 0.151
2020 319.0 0.164
2021 320.1 0.177
2022 321.0 0.189
2023 321.8 0.200
2024 322.6 0.211
2025 323.2 0.222
2026 323.8 0.233
2027 324.4 0.243
2028 324.9 0.253
2029 325.4 0.262
2030 325.8 0.270


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



 
 


wds20306%2B1349b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)31.65y± 1.3 Periastron (T)2006.25y± 0.05 Semi-major axis (a)0.121a± 0.005
Eccentricity (e)0.859± 0.003 Inclination (i)63.7°± 1.5 Longitude of periastron (ω)305.6°± 1
Node (Ω)175.9°± 1 Notes ReferenceDoc2021e
Equinox Last observation2016 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 338.9 0.143
2001 340.8 0.134
2002 343.1 0.122
2003 346.0 0.108
2004 349.9 0.088
2005 356.9 0.060
2006 39.4 0.013
2007 205.5 0.030
2008 240.7 0.036
2009 263.8 0.045
2010 278.7 0.056
2011 288.6 0.067
2012 295.8 0.079
2013 301.1 0.089
2014 305.4 0.099
2015 308.9 0.109
2016 311.9 0.117
2017 314.4 0.125
2018 316.7 0.132
2019 318.8 0.139
2020 320.6 0.145
2021 322.4 0.150
2022 324.0 0.154
2023 325.6 0.157
2024 327.1 0.159
2025 328.6 0.161
2026 330.0 0.162
2027 331.5 0.161
2028 332.9 0.160
2029 334.4 0.157
2030 336.0 0.153


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



 
 


wds20306%2B1349c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic