18054+6216 HU 1290 (HD 166206)

 
 
18h 05m 21.36s +62° 15' 58.6" P.A. 306.00 sep 0.3 mag 9.29,9.73 Sp F8 dist. 128.21 pc (418.22 l.y.)
 
 
Coord 2000 18054+6216 Discov num HU 1290 Comp Coord arcsec 2000 18 05 21.36 +62 15 58.6
Date first 1905 Date last 2010 Obs 27
Pa first 138 Pa last 306.4 P.A. Now (θ) 306.4°
Sep first 0.4 Sep last 0.278 Sep. Now (ρ) 0.278"
Mag pri 9.29 Mag sec 9.73 delta mag (ΔM) 0.44 Spectral class F8 (yellow-white)
Pri motion ra -020 Sec motion ra
Pri motion dec +060 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166206 Constellation Draco SAO 17751 HIP 88592
Tycho2 4205-00360-1 Gaia DR2 2159264541430661504 HD 166206 ADS 11073
BD BD+62 1595 Distance 128.21 Distance ly 418.22
 
 
ORBITAL ELEMENTS
 
 
Period (P)294.94y± 10.03 Periastron (T)1985.026y± 44.81 Semi-major axis (a)0.4755a± 0.0528
Eccentricity (e)0.2567± 0.0514 Inclination (i)120.35°± 0.48 Longitude of periastron (ω)80.56°± 12.5
Node (Ω)110.45°± 6.4 Notes ReferencePop2000a
Equinox2000 Last observation1953 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 342.0 0.218
2001 339.2 0.225
2002 336.6 0.231
2003 334.2 0.238
2004 331.9 0.246
2005 329.7 0.253
2006 327.7 0.260
2007 325.7 0.268
2008 323.9 0.275
2009 322.2 0.283
2010 320.5 0.290
2011 319.0 0.298
2012 317.5 0.305
2013 316.1 0.312
2014 314.7 0.320
2015 313.4 0.327
2016 312.2 0.334
2017 311.0 0.341
2018 309.9 0.348
2019 308.8 0.355
2020 307.7 0.361
2021 306.7 0.368
2022 305.7 0.374
2023 304.8 0.380
2024 303.9 0.386
2025 303.0 0.392
2026 302.1 0.397
2027 301.3 0.403
2028 300.4 0.408
2029 299.6 0.413
2030 298.9 0.418


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


 
  


wds18054%2B6216a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic