20396+0458 KUI 99 AB (OQ Del)

20h 39m 37.71s +04° 58' 19.3" P.A. 111.00 sep 0.3 mag 8.28,9.63 Sp K5V dist. 16.72 pc (54.54 l.y.)

Coord 2000 20396+0458 Discov num KUI  99 Comp AB Coord arcsec 2000 20 39 37.71 +04 58 19.3
Date first 1934 Date last 2021 Obs 162
Pa first 313 Pa last 110.5 P.A. Now (θ) 124.6°
Sep first 0.7 Sep last 0.333 Sep. Now (ρ) 0.533"
Mag pri 8.28 Mag sec 9.63 delta mag (ΔM) 1.35 Spectral class K5V (yellow-orange)
Pri motion ra +874 Sec motion ra +874
Pri motion dec +091 Sec motion dec +091
Notes N O (See Notes, Orbital solution)




This double is physical.



20396+0458 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 126068 20 39 38 +04 58 19 BAG 14 Aa,Ab 2021 27 49 0.2 8.80 9.90 1.10 Y
Show OQ Del 126068 20 39 38 +04 58 19 KUI 99 AB 2021 162 111 0.3 8.28 9.63 1.35 Y <===


Triple system
2 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Var name OQ Del Constellation Delphinus SAO 126068 HIP 101955
Tycho2 0519-00866-1 HD 196795 GC 28771 GL Gl 795A
BD BD+04 4510 Distance 16.72 Distance ly 54.54




ORBITAL ELEMENTS

Period (P)38.679y± 0.031 Periastron (T)2016.11y± 1.32 Semi-major axis (a)0.855a± 0.11
Eccentricity (e)0.118± 0.016 Inclination (i)87.4°± 0.05 Longitude of periastron (ω)233.4°± 0.5
Node (Ω)127.6°± 0.08 Notesn ReferenceTok2017a
Equinox2000 Last observation2016 Grade2(1=Definitive, 9=Indet.)

label theta rho
2000 139.1 0.209
2001 155.4 0.091
2002 265.4 0.063
2003 294.2 0.177
2004 300.1 0.296
2005 302.6 0.410
2006 304.0 0.516
2007 305.0 0.608
2008 305.7 0.685
2009 306.3 0.743
2010 306.9 0.779
2011 307.4 0.791
2012 307.9 0.777
2013 308.4 0.737
2014 309.0 0.670
2015 309.8 0.578
2016 310.9 0.464
2017 312.9 0.333
2018 317.7 0.190
2019 351.7 0.050
2020 111.0 0.122
2021 120.3 0.268
2022 123.1 0.407
2023 124.6 0.533
2024 125.4 0.644
2025 126.1 0.738
2026 126.6 0.811
2027 127.0 0.865
2028 127.4 0.898
2029 127.8 0.911
2030 128.2 0.904


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



 
 


wds20396%2B0458d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic