17471+1742 STF 2215 (HD 161833)

 
 
17h 47m 08.05s +17° 41' 49.2" P.A. 249.00 sep 0.4 mag 6.02,6.89 Sp A1V dist. 143.06 pc (466.66 l.y.)
 
 
Coord 2000 17471+1742 Discov num STF2215 Comp Coord arcsec 2000 17 47 08.05 +17 41 49.2
Date first 1831 Date last 2018 Obs 224
Pa first 311 Pa last 249.1 P.A. Now (θ) 249.1°
Sep first 0.8 Sep last 0.411 Sep. Now (ρ) 0.411"
Mag pri 6.02 Mag sec 6.89 delta mag (ΔM) 0.87 Spectral class A1V (white)
Pri motion ra +012 Sec motion ra +012
Pri motion dec -013 Sec motion dec -013
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 161833 Constellation Hercules SAO 103106 HIP 87044
Tycho2 1556-01341-1 Gaia DR2 4550988750326340608 HD 161833 HR 6627
GC 24150 ADS 10795 BD BD+17 3334 Distance 143.06
Distance ly 466.66
 
 
ORBITAL ELEMENTS
 
 
Period (P)1062.47y± 12.7 Periastron (T)2066.49y± 11.67 Semi-major axis (a)0.838a± 0.006
Eccentricity (e)0.397± 0.004 Inclination (i)132.2°± 0.5 Longitude of periastron (ω)270.6°± 2.3
Node (Ω)105.5°± 1.5 Notesn ReferenceCve2006e
Equinox2000 Last observation2002 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 257.7 0.505
2001 257.1 0.502
2002 256.5 0.498
2003 255.9 0.495
2004 255.3 0.491
2005 254.7 0.488
2006 254.1 0.484
2007 253.4 0.481
2008 252.8 0.477
2009 252.1 0.473
2010 251.5 0.470
2011 250.8 0.466
2012 250.1 0.463
2013 249.4 0.459
2014 248.7 0.456
2015 248.0 0.452
2016 247.3 0.449
2017 246.6 0.445
2018 245.8 0.442
2019 245.1 0.439
2020 244.3 0.435
2021 243.5 0.432
2022 242.7 0.428
2023 241.9 0.425
2024 241.1 0.422
2025 240.3 0.419
2026 239.4 0.415
2027 238.6 0.412
2028 237.7 0.409
2029 236.8 0.406
2030 235.9 0.403


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



 
 


wds17471%2B1742b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic