17530+8354 STT 349 (HD 167101)

17h 52m 59.03s +83° 54' 27.2" P.A. 52.00 sep 0.5 mag 7.95,8.89 Sp G5 dist. 219.3 pc (715.36 l.y.)

Coord 2000 17530+8354 Discov num STT 349 Comp Coord arcsec 2000 17 52 59.03 +83 54 27.2
Date first 1843 Date last 2018 Obs 74
Pa first 92 Pa last 51.6 P.A. Now (θ) 51.6°
Sep first 0.4 Sep last 0.518 Sep. Now (ρ) 0.518"
Mag pri 7.95 Mag sec 8.89 delta mag (ΔM) 0.94 Spectral class G5 (yellow)
Pri motion ra +005 Sec motion ra +005
Pri motion dec +008 Sec motion dec +008
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 167101 Constellation Draco SAO 2975 HIP 87534
Tycho2 4647-01538-1 Gaia DR2 1711360818950866176 HD 167101 ADS 11006
BD BD+83 527 Distance 219.3 Distance ly 715.36




ORBITAL ELEMENTS

Period (P)433y Periastron (T)1912y Semi-major axis (a)0.635a
Eccentricity (e)0.87 Inclination (i)67.5° Longitude of periastron (ω)128°
Node (Ω)98° Notesn ReferenceHei1995
Equinox2000 Last observation Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 51.2 0.440
2001 51.6 0.444
2002 51.9 0.448
2003 52.2 0.452
2004 52.5 0.457
2005 52.8 0.461
2006 53.1 0.465
2007 53.4 0.469
2008 53.7 0.473
2009 53.9 0.477
2010 54.2 0.482
2011 54.5 0.486
2012 54.8 0.490
2013 55.0 0.494
2014 55.3 0.498
2015 55.5 0.502
2016 55.8 0.506
2017 56.0 0.510
2018 56.3 0.514
2019 56.5 0.518
2020 56.7 0.521
2021 57.0 0.525
2022 57.2 0.529
2023 57.4 0.533
2024 57.6 0.537
2025 57.9 0.541
2026 58.1 0.544
2027 58.3 0.548
2028 58.5 0.552
2029 58.7 0.556
2030 58.9 0.559


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



 
 


wds17530%2B8354a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic