18044+0337 A 2257 (HD 165110)

 
 
18h 04m 22.03s +03° 36' 50.0" P.A. 36.00 sep 0.2 mag 9.80,10.00 Sp F5
 
 
Coord 2000 18044+0337 Discov num A  2257 Comp Coord arcsec 2000 18 04 22.03 +03 36 50.0
Date first 1910 Date last 2018 Obs 13
Pa first 163 Pa last 36.4 P.A. Now (θ) 36.4°
Sep first 0.2 Sep last 0.168 Sep. Now (ρ) 0.168"
Mag pri 9.80 Mag sec 10.00 delta mag (ΔM) 0.2 Spectral class F5 (yellow-white)
Pri motion ra +004 Sec motion ra
Pri motion dec +013 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 165110 Constellation Ophiuchus SAO 123087 Tycho2 0434-00384-1
Gaia DR2 4469450415421218816 HD 165110 ADS 11033
 
 
ORBITAL ELEMENTS
 
 
Period (P)333y± 20 Periastron (T)1988.73y± 0.06 Semi-major axis (a)0.324a± 0.015
Eccentricity (e)0.829± 0.006 Inclination (i)73.5°± 1 Longitude of periastron (ω)274.3°± 2
Node (Ω)13.6°± 1 Notesn ReferenceDoc2008a
Equinox2000 Last observation2005 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 20.8 0.129
2001 21.8 0.134
2002 22.8 0.138
2003 23.7 0.142
2004 24.6 0.146
2005 25.4 0.149
2006 26.2 0.152
2007 27.0 0.154
2008 27.7 0.157
2009 28.4 0.159
2010 29.1 0.161
2011 29.8 0.163
2012 30.5 0.165
2013 31.1 0.166
2014 31.8 0.168
2015 32.4 0.169
2016 33.0 0.171
2017 33.7 0.172
2018 34.3 0.173
2019 34.9 0.174
2020 35.5 0.175
2021 36.0 0.175
2022 36.6 0.176
2023 37.2 0.177
2024 37.8 0.177
2025 38.3 0.178
2026 38.9 0.179
2027 39.5 0.179
2028 40.0 0.179
2029 40.6 0.180
2030 41.2 0.180


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


 
  


wds18044%2B0337b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic