09074-4357 B 1646 AB

 
 
09h 07m 23.26s -43 57' 18.3" P.A. 265.00 sep 0.0 mag 9.50,9.90 Sp A5/7II
 
 
Coord 2000 09074-4357 Discov num B  1646 Comp AB Coord arcsec 2000 09 07 23.26 -43 57 18.3
Date first 1929 Date last 2021 Obs 9
Pa first 24 Pa last 265.4 P.A. Now (θ) 265.4°
Sep first 0.3 Sep last 0.041 Sep. Now (ρ) 0.041"
Mag pri 9.50 Mag sec 9.90 delta mag (ΔM) 0.4 Spectral class A5/7II (white)
Pri motion ra -010 Sec motion ra
Pri motion dec +001 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
09074-4357 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 220870 09 07 23 -43 57 18 B 1646 AB 2021 9 265 0.0 9.50 9.90 0.40 Y <===
Show HD 78547 220870 09 07 23 -43 57 18 HJ 4180 AB,C 2015 9 128 22.1 8.55 10.09 1.54
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Vela SAO 220870 Tycho2 7689-02574-1 Gaia DR2 5331063701595081216
HD 78547 DM CP-43 3354
 
 
ORBITAL ELEMENTS
 
 
Period (P)208y Periastron (T)2029.4y Semi-major axis (a)0.188a
Eccentricity (e)0.6 Inclination (i)116.2° Longitude of periastron (ω)161.1°
Node (Ω)15.9° Notes ReferenceTok2020e
Equinox Last observation2019 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 356.7 0.148
2001 355.7 0.143
2002 354.6 0.138
2003 353.4 0.132
2004 352.1 0.127
2005 350.7 0.121
2006 349.2 0.115
2007 347.5 0.109
2008 345.5 0.103
2009 343.4 0.097
2010 340.9 0.091
2011 338.1 0.085
2012 334.9 0.079
2013 331.1 0.073
2014 326.7 0.067
2015 321.4 0.061
2016 315.2 0.056
2017 307.7 0.052
2018 298.9 0.048
2019 288.8 0.045
2020 277.7 0.044
2021 266.2 0.044
2022 255.1 0.045
2023 244.9 0.047
2024 236.0 0.051
2025 228.2 0.055
2026 221.6 0.059
2027 215.8 0.063
2028 210.7 0.067
2029 206.2 0.071
2030 202.0 0.074


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



 
 


wds09074-4357b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic