18068-4325 HJ 5014 (HD 165189)

18h 06m 49.91s -43° 25' 30.0" sep 1.8 mag 5.65,5.68 Sp A5V+A5V dist. 41.84 pc (136.48 l.y.)

Coord 2000 18068-4325 Discov num HJ 5014 Comp Coord arcsec 2000 18 06 49.91 -43 25 30.0
Date first 1836 Date last 2019 Obs 129
Pa first 249 Pa last 0.1 P.A. Now (θ) 0.1°
Sep first 1.0 Sep last 1.798 Sep. Now (ρ) 1.798"
Mag pri 5.65 Mag sec 5.68 delta mag (ΔM) 0.03 Spectral class A5V+A5V (white/white)
Pri motion ra +014 Sec motion ra +014
Pri motion dec -105 Sec motion dec -105
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 165189 Constellation Corona Austrina SAO 228708 HIP 88726
Tycho2 7911-05035-1 Gaia DR2 6724105656508792576 HD 165189 HR 6749
GC 24649 CD CD-4312272 CP CP-43 8434 Distance 41.84
Distance ly 136.48




ORBITAL ELEMENTS

Period (P)450y Periastron (T)1854.7y Semi-major axis (a)2.04a
Eccentricity (e)0.65 Inclination (i)123.1° Longitude of periastron (ω)282.7°
Node (Ω)85.8° Notesn ReferenceAry2001a
Equinox2000 Last observation1999 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 7.2 1.693
2001 6.7 1.695
2002 6.2 1.698
2003 5.7 1.700
2004 5.3 1.703
2005 4.8 1.705
2006 4.3 1.708
2007 3.8 1.710
2008 3.4 1.713
2009 2.9 1.715
2010 2.4 1.718
2011 2.0 1.721
2012 1.5 1.723
2013 1.0 1.726
2014 0.6 1.729
2015 0.1 1.731
2016 359.6 1.734
2017 359.2 1.737
2018 358.7 1.740
2019 358.3 1.743
2020 357.8 1.745
2021 357.4 1.748
2022 356.9 1.751
2023 356.5 1.754
2024 356.0 1.757
2025 355.6 1.760
2026 355.1 1.763
2027 354.7 1.766
2028 354.2 1.769
2029 353.8 1.772
2030 353.4 1.775


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



 
 


wds18068-4325a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic