17403+6341 STF 2218 (HD 161285)

17h 40m 18.07s +63° 40' 31.4" P.A. 310.00 sep 1.5 mag 7.08,8.37 Sp F8V dist. 68.49 pc (223.41 l.y.)

Coord 2000 17403+6341 Discov num STF2218 Comp Coord arcsec 2000 17 40 18.07 +63 40 31.4
Date first 1831 Date last 2016 Obs 169
Pa first 0 Pa last 309.5 P.A. Now (θ) 309.5°
Sep first 2.8 Sep last 1.473 Sep. Now (ρ) 1.473"
Mag pri 7.08 Mag sec 8.37 delta mag (ΔM) 1.29 Spectral class F8V (yellow-white)
Pri motion ra +006 Sec motion ra +006
Pri motion dec +140 Sec motion dec +140
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 161285 Constellation Draco SAO 17599 HIP 86482
Tycho2 4203-01438-1 Gaia DR2 1440606660430810240 HD 161285 GC 24017
ADS 10728 BD BD+63 1371 Distance 68.49 Distance ly 223.41




ORBITAL ELEMENTS

Period (P)1051.1579y± 490.04 Periastron (T)2080.8913y± 23.2432 Semi-major axis (a)3.04833a± 1.33201
Eccentricity (e)0.82722± 0.14405 Inclination (i)120.982°± 13.732 Longitude of periastron (ω)254.754°± 10.937
Node (Ω)93.827°± 22.742 Notes ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 315.7 1.546
2001 315.3 1.540
2002 314.9 1.534
2003 314.5 1.527
2004 314.1 1.521
2005 313.7 1.514
2006 313.3 1.508
2007 312.9 1.501
2008 312.5 1.494
2009 312.1 1.487
2010 311.7 1.480
2011 311.3 1.473
2012 310.8 1.466
2013 310.4 1.459
2014 310.0 1.452
2015 309.5 1.444
2016 309.1 1.437
2017 308.6 1.429
2018 308.2 1.422
2019 307.7 1.414
2020 307.3 1.406
2021 306.8 1.398
2022 306.3 1.390
2023 305.9 1.382
2024 305.4 1.374
2025 304.9 1.365
2026 304.4 1.357
2027 303.9 1.348
2028 303.4 1.339
2029 302.9 1.330
2030 302.3 1.321


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



 
 


wds17403%2B6341b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic