18235-3844 I 1364 (HD 168800)

18h 23m 27.12s -38° 44' 11.3" P.A. 176.00 sep 0.1 mag 9.30,9.50 Sp G8III

Coord 2000 18235-3844 Discov num I  1364 Comp Coord arcsec 2000 18 23 27.12 -38 44 11.3
Date first 1926 Date last 2019 Obs 9
Pa first 217 Pa last 176 P.A. Now (θ) 176°
Sep first 0.4 Sep last 0.101 Sep. Now (ρ) 0.101"
Mag pri 9.30 Mag sec 9.50 delta mag (ΔM) 0.2 Spectral class G8III (yellow)
Pri motion ra -008 Sec motion ra
Pri motion dec +009 Sec motion dec
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 168800 Constellation Corona Austrina SAO 210071 Tycho2 7901-02056-1
Gaia DR2 6727060903246748160 HD 168800




ORBITAL ELEMENTS

Period (P)500y Periastron (T)2123y Semi-major axis (a)0.321a
Eccentricity (e)0 Inclination (i)79.7° Longitude of periastron (ω)
Node (Ω)31.5° Notes ReferenceTok2021c
Equinox2000 Last observation2020 Grade5(1=Definitive, 9=Indet.)

label theta rho
2000 309.5 0.058
2001 313.4 0.059
2002 317.2 0.060
2003 320.9 0.061
2004 324.4 0.062
2005 327.8 0.064
2006 330.9 0.066
2007 333.9 0.068
2008 336.7 0.070
2009 339.4 0.072
2010 341.9 0.074
2011 344.2 0.077
2012 346.3 0.080
2013 348.4 0.082
2014 350.2 0.085
2015 352.0 0.088
2016 353.7 0.091
2017 355.2 0.094
2018 356.6 0.097
2019 358.0 0.100
2020 359.3 0.104
2021 0.5 0.107
2022 1.6 0.110
2023 2.7 0.113
2024 3.7 0.116
2025 4.6 0.120
2026 5.5 0.123
2027 6.4 0.126
2028 7.2 0.130
2029 8.0 0.133
2030 8.7 0.136


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



 
 


wds18235-3844a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic