18108-3529 B 1352 (HD 166136)

 
 
18h 10m 46.22s -35° 28' 40.9" P.A. 224.00 sep 0.2 mag 9.88,9.87 Sp G3V dist. 101.21 pc (330.15 l.y.)
 
 
Coord 2000 18108-3529 Discov num B  1352 Comp Coord arcsec 2000 18 10 46.22 -35 28 40.9
Date first 1932 Date last 2021 Obs 13
Pa first 62 Pa last 224 P.A. Now (θ) 224°
Sep first 0.2 Sep last 0.243 Sep. Now (ρ) 0.243"
Mag pri 9.88 Mag sec 9.87 delta mag (ΔM) 0.01 Spectral class G3V (yellow)
Pri motion ra +015 Sec motion ra
Pri motion dec -015 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166136 Constellation Sagittarius SAO 209813 HIP 89076
Tycho2 7400-01004-1 HD 166136 CD CD-3512338 CP CP-35 7781
Distance 101.21 Distance ly 330.15
 
 
ORBITAL ELEMENTS
 
 
Period (P)123.84y Periastron (T)2039.29y Semi-major axis (a)0.257a
Eccentricity (e)0.45 Inclination (i)51.4° Longitude of periastron (ω)81.9°
Node (Ω)240° Notes ReferenceMsn2017a
Equinox2000 Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 182.7 0.231
2001 184.7 0.232
2002 186.7 0.232
2003 188.7 0.233
2004 190.7 0.233
2005 192.6 0.234
2006 194.6 0.234
2007 196.5 0.234
2008 198.5 0.235
2009 200.4 0.235
2010 202.4 0.235
2011 204.3 0.235
2012 206.3 0.234
2013 208.2 0.234
2014 210.2 0.233
2015 212.1 0.233
2016 214.1 0.232
2017 216.1 0.230
2018 218.2 0.229
2019 220.2 0.227
2020 222.3 0.224
2021 224.5 0.222
2022 226.7 0.219
2023 229.0 0.215
2024 231.3 0.211
2025 233.8 0.206
2026 236.4 0.201
2027 239.1 0.195
2028 242.0 0.188
2029 245.2 0.181
2030 248.6 0.173


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



 
 


wds18108-3529a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic