18181-0120 HDS 2587 AB (HD 168073)

 
 
18h 18m 05.51s -01° 19' 48.5" P.A. 181.00 sep 0.1 mag 7.78,9.34 Sp A0 dist. 227.79 pc (743.05 l.y.)
 
 
Coord 2000 18181-0120 Discov num HDS2587 Comp AB Coord arcsec 2000 18 18 05.51 -01 19 48.5
Date first 1991 Date last 2019 Obs 7
Pa first 350 Pa last 181.4 P.A. Now (θ) 181.4°
Sep first 0.1 Sep last 0.103 Sep. Now (ρ) 0.103"
Mag pri 7.78 Mag sec 9.34 delta mag (ΔM) 1.56 Spectral class A0 (white)
Pri motion ra +002 Sec motion ra
Pri motion dec +002 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
18181-0120 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 168073 142206 18 18 06 -01 19 48 HDS 2587 AB 2019 7 181 0.1 7.78 9.34 1.56 Y <===
Show 142206 18 18 06 -01 19 48 GII 265 AC 2013 1 167 1.8 7.78
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 168073 Constellation Serpens SAO 142206 HIP 89680
Tycho2 5098-00553-1 HD 168073 BD BD-01 3469 Distance 227.79
Distance ly 743.05
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
Identifier18181-0120 HDS2587
coord_arcsec_2000181805.51-011948.5
Period (P)72.865y Periastron (T)2011.774y Semi-major axis (a)0.13a
Eccentricity (e)0.3 Inclination (i)55.5° Longitude of periastron (ω)100.2°
Node (Ω)8.8° Notesn ReferenceTok2018e
Equinox2000 Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 13.3 0.119
2001 16.6 0.114
2002 20.3 0.108
2003 24.4 0.102
2004 29.0 0.095
2005 34.5 0.087
2006 41.1 0.079
2007 49.2 0.071
2008 59.3 0.063
2009 71.9 0.057
2010 87.0 0.053
2011 103.7 0.052
2012 120.0 0.054
2013 134.2 0.059
2014 145.9 0.066
2015 155.3 0.073
2016 162.9 0.081
2017 169.2 0.088
2018 174.5 0.095
2019 179.2 0.101
2020 183.4 0.106
2021 187.2 0.111
2022 190.8 0.114
2023 194.2 0.117
2024 197.4 0.119
2025 200.6 0.120
2026 203.7 0.120
2027 206.9 0.120
2028 210.0 0.119
2029 213.2 0.118
2030 216.5 0.117


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



 
 


wds18181-0120a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic