17572+2400 MCA 50 (HD 163840)

 
 
17h 57m 14.34s +23° 59' 44.6" P.A. 163.00 sep 0.1 mag 6.30,7.90 Sp G2V+K2V dist. 28.25 pc (92.15 l.y.)
 
 
Coord 2000 17572+2400 Discov num MCA  50 Comp Coord arcsec 2000 17 57 14.34 +23 59 44.6
Date first 1976 Date last 2012 Obs 29
Pa first 160 Pa last 162.6 P.A. Now (θ) 162.6°
Sep first 0.1 Sep last 0.088 Sep. Now (ρ) 0.088"
Mag pri 6.30 Mag sec 7.90 delta mag (ΔM) 1.6 Spectral class G2V+K2V (yellow/yellow-orange)
Pri motion ra -013 Sec motion ra
Pri motion dec +071 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 163840 Constellation Hercules SAO 85575 HIP 87895
Tycho2 2090-04674-1 Gaia DR2 4580864547137360512 HD 163840 HR 6697
GC 24423 GL NN 4039A BD BD+24 3283 Distance 28.25
Distance ly 92.15
 
 
ORBITAL ELEMENTS
 
 
Period (P)881.628d (2.41y)± 0.064 Periastron (T)55650.39d (2011.241y)± 0.38 Semi-major axis (a)80.64m
Eccentricity (e)0.4165± 0.001 Inclination (i)72.83°± 0.47 Longitude of periastron (ω)135.46°± 0.16
Node (Ω)175.32°± 0.44 Notesn ReferenceKie2016
Equinox2000 Last observation2015 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 134.0 0.045
2001-01-01 176.5 0.092
2002-01-01 28.9 0.038
2003-01-01 165.5 0.098
2004-01-01 339.2 0.035
2005-01-01 149.4 0.065
2006-01-01 183.2 0.071
2007-01-01 75.3 0.028
2008-01-01 170.0 0.101
2009-01-01 0.4 0.053
2010-01-01 157.8 0.082
2011-01-01 199.4 0.037
2012-01-01 123.3 0.037
2013-01-01 174.5 0.097
2014-01-01 18.3 0.045
2015-01-01 163.6 0.095
2016-01-01 314.2 0.021
2017-01-01 144.5 0.057
2018-01-01 180.1 0.081
2019-01-01 52.9 0.030
2020-01-01 168.2 0.101
2021-01-01 353.8 0.050
2022-01-01 154.9 0.075
2023-01-01 190.3 0.052
2024-01-01 107.8 0.031
2025-01-01 172.6 0.100
2026-01-01 10.2 0.050
2027-01-01 161.5 0.090
2028-01-01 248.1 0.016
2029-01-01 138.0 0.049
2030-01-01 177.6 0.089


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



 
 


wds17572%2B2400b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic