09074-4357 B  1646AB

 
 
09h 07m 23.26s -43 57' 18.3" P.A. 266.80 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
2019
Obs
8
Pa first
24
Pa last
281
P.A. Now (θ)
266.8°
Sep first
0.3
Sep last
0.0
Sep. Now (ρ)
0.04"
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
Nature of this double is uncertain.
 
 
09074-4357 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 220870 09074-4357 B 1646 AB 1929 2019 8 267 0.0 9.50 9.90 0.40 Y <===
Show 220870 09074-4357 HJ 4180 AB,C 1836 2015 9 128 22.1 8.55 10.09 1.54
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
281.2
Precise sep
0.043
Constellation
Vela
SAO
220870
Tycho2
7689-02574-1
Gaia DR2
01595081216
HD
78547
last precise pa
281.2
last precise sep
0.043
 
 
ORBITAL ELEMENTS
 
 
Period (P)208y Periastron (T)2029.45y Semi-major axis (a)0.188a
Eccentricity (e)0.6 Inclination (i)116.2° Longitude of periastron (ω)161.1°
Node (Ω)15.9° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2019
label rho theta
2000 0.149 356.8
2001 0.143 355.8
2002 0.138 354.7
2003 0.133 353.5
2004 0.127 352.2
2005 0.121 350.8
2006 0.115 349.3
2007 0.109 347.5
2008 0.103 345.6
2009 0.097 343.5
2010 0.091 341.1
2011 0.085 338.3
2012 0.079 335.1
2013 0.073 331.3
2014 0.067 326.9
2015 0.062 321.7
2016 0.056 315.5
2017 0.052 308.1
2018 0.048 299.3
2019 0.045 289.3
2020 0.044 278.3
2021 0.043 266.8
2022 0.045 255.6
2023 0.047 245.4
2024 0.051 236.4
2025 0.055 228.6
2026 0.059 221.9
2027 0.063 216.1
2028 0.067 211.0
2029 0.071 206.4
2030 0.073 202.2

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






wds09074-4357a.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
09074-4357 B 1646 AB 1993 5 2 0.2 9.50 9.90 A5/7II 090723.26-435718.3
09074-4357 B 1646 AB 2018 6 300 0.0 9.50 9.90 A5/7II 090723.26-435718.3
09074-4357 B 1646 AB 2019 8 281 0.0 9.50 9.90 A5/7II 090723.26-435718.3

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