18096+0609 STF 2283 (HD 166257)

 
 
18h 09m 34.22s +06° 08' 44.6" P.A. 48.00 sep 0.5 mag 8.25,8.73 Sp F5V dist. 130.55 pc (425.85 l.y.)
 
 
Coord 2000 18096+0609 Discov num STF2283 Comp Coord arcsec 2000 18 09 34.22 +06 08 44.6
Date first 1829 Date last 2018 Obs 132
Pa first 93 Pa last 47.7 P.A. Now (θ) 47.7°
Sep first 1.2 Sep last 0.54 Sep. Now (ρ) 0.54"
Mag pri 8.25 Mag sec 8.73 delta mag (ΔM) 0.48 Spectral class F5V (yellow-white)
Pri motion ra -008 Sec motion ra -008
Pri motion dec -033 Sec motion dec -033
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166257 Constellation Ophiuchus SAO 123189 HIP 88965
Tycho2 0443-02788-1 Gaia DR2 4471859857717152896 HD 166257 GC 24756
ADS 11110 BD BD+06 3638 Distance 130.55 Distance ly 425.85
 
 
ORBITAL ELEMENTS
 
 
Period (P)2112.6541y± 1028.0629 Periastron (T)2179.5587y± 422.9152 Semi-major axis (a)3.45289a± 2.15588
Eccentricity (e)0.93271± 0.10674 Inclination (i)101.638°± 12.326 Longitude of periastron (ω)244.13°± 37.661
Node (Ω)136.654°± 32.742 Notes ReferenceIzm2019
Equinox Last observation2011 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 58.1 0.638
2001 57.7 0.635
2002 57.4 0.632
2003 57.0 0.629
2004 56.6 0.626
2005 56.2 0.623
2006 55.9 0.620
2007 55.5 0.617
2008 55.1 0.614
2009 54.7 0.612
2010 54.3 0.609
2011 53.9 0.606
2012 53.5 0.603
2013 53.1 0.601
2014 52.7 0.598
2015 52.3 0.595
2016 51.8 0.593
2017 51.4 0.590
2018 51.0 0.587
2019 50.6 0.585
2020 50.1 0.582
2021 49.7 0.580
2022 49.3 0.577
2023 48.8 0.575
2024 48.4 0.572
2025 47.9 0.570
2026 47.4 0.568
2027 47.0 0.565
2028 46.5 0.563
2029 46.1 0.561
2030 45.6 0.558


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



 
 


wds18096%2B0609a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic