18151-5751 HJ 5029 (HD 166653)

 
 
18h 15m 08.66s -57° 51' 15.8" P.A. 79.00 sep 1.8 mag 8.28,8.55 Sp G2V dist. 51.41 pc (167.7 l.y.)
 
 
Coord 2000 18151-5751 Discov num HJ 5029 Comp Coord arcsec 2000 18 15 08.66 -57 51 15.8
Date first 1836 Date last 2021 Obs 50
Pa first 122 Pa last 78.9 P.A. Now (θ) 78.9°
Sep first 2.0 Sep last 1.844 Sep. Now (ρ) 1.844"
Mag pri 8.28 Mag sec 8.55 delta mag (ΔM) 0.27 Spectral class G2V (yellow)
Pri motion ra +073 Sec motion ra +073
Pri motion dec -106 Sec motion dec -106
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166653 Constellation Pavo SAO 245335 HIP 89430
Tycho2 8752-01504-1 Gaia DR2 6647851265236712448 HD 166653 GC 24858
CP CP-57 8940 Distance 51.41 Distance ly 167.7
 
 
ORBITAL ELEMENTS
 
 
Period (P)792.0885y± 327.5025 Periastron (T)1796.8186y± 18.8777 Semi-major axis (a)3.99925a± 2.32148
Eccentricity (e)0.75497± 0.20189 Inclination (i)103.022°± 7.264 Longitude of periastron (ω)276.603°± 15.593
Node (Ω)126.771°± 5.587 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 85.8 1.933
2001 85.5 1.928
2002 85.2 1.922
2003 84.9 1.916
2004 84.6 1.911
2005 84.3 1.905
2006 84.0 1.900
2007 83.7 1.895
2008 83.4 1.889
2009 83.1 1.884
2010 82.8 1.878
2011 82.5 1.873
2012 82.2 1.867
2013 81.9 1.862
2014 81.6 1.857
2015 81.3 1.851
2016 81.0 1.846
2017 80.6 1.841
2018 80.3 1.835
2019 80.0 1.830
2020 79.7 1.825
2021 79.4 1.820
2022 79.0 1.815
2023 78.7 1.810
2024 78.4 1.804
2025 78.1 1.799
2026 77.7 1.794
2027 77.4 1.789
2028 77.0 1.784
2029 76.7 1.779
2030 76.4 1.774


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



 
 


wds18151-5751a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic