18516-6054 RST 5126 (HD 173895)

 
 
18h 51m 34.80s -60° 53' 44.5" P.A. 144.00 sep 0.1 mag 7.92,8.78 Sp F0/2IV/V dist. 162.07 pc (528.67 l.y.)
 
 
Coord 2000 18516-6054 Discov num RST5126 Comp Coord arcsec 2000 18 51 34.80 -60 53 44.5
Date first 1942 Date last 2021 Obs 16
Pa first 247 Pa last 143.8 P.A. Now (θ) 158.5°
Sep first 0.2 Sep last 0.123 Sep. Now (ρ) 0.138"
Mag pri 7.92 Mag sec 8.78 delta mag (ΔM) 0.86 Spectral class F0/2IV/V (yellow-white)
Pri motion ra +032 Sec motion ra
Pri motion dec -035 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 173895 Constellation Pavo SAO 254390 HIP 92547
Tycho2 9070-00843-1 Gaia DR2 6632086295721488640 HD 173895 GC 25804
CP CP-61 6260 Distance 162.07 Distance ly 528.67
 
 
ORBITAL ELEMENTS
 
 
Period (P)54.16y± 3.17 Periastron (T)2011.97y± 0.36 Semi-major axis (a)0.13a± 0.005
Eccentricity (e)0.492± 0.02 Inclination (i)21.7°± 13.8 Longitude of periastron (ω)12.8°± 36.1
Node (Ω)15°± 34.5 Notes ReferenceTok2015c
Equinox2000 Last observation2014 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 253.0 0.140
2001 257.8 0.134
2002 263.2 0.127
2003 269.2 0.119
2004 276.0 0.111
2005 283.9 0.104
2006 293.0 0.096
2007 303.7 0.089
2008 316.2 0.082
2009 330.9 0.076
2010 347.9 0.071
2011 7.0 0.067
2012 27.5 0.066
2013 48.5 0.066
2014 68.6 0.069
2015 86.5 0.074
2016 101.7 0.081
2017 114.5 0.089
2018 125.0 0.097
2019 133.8 0.106
2020 141.3 0.115
2021 147.8 0.123
2022 153.4 0.131
2023 158.5 0.138
2024 163.0 0.145
2025 167.1 0.152
2026 170.9 0.158
2027 174.4 0.164
2028 177.7 0.169
2029 180.8 0.173
2030 183.7 0.177


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



 
 


wds18516-6054a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic