18323-1439 CHR 73 (HD 170902)

 
 
18h 32m 20.66s -14° 38' 39.2" P.A. 254.00 sep 0.0 mag 6.60,8.30 Sp A4V dist. 82.17 pc (268.04 l.y.)
 
 
Coord 2000 18323-1439 Discov num CHR  73 Comp Coord arcsec 2000 18 32 20.66 -14 38 39.2
Date first 1985 Date last 2021 Obs 19
Pa first 41 Pa last 254.3 P.A. Now (θ) 214.4°
Sep first 0.0 Sep last 0.041 Sep. Now (ρ) 0.044"
Mag pri 6.60 Mag sec 8.30 delta mag (ΔM) 1.7 Spectral class A4V (white)
Pri motion ra +003 Sec motion ra
Pri motion dec -027 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 170902 Constellation Scutum SAO 161580 HIP 90884
Tycho2 5703-02421-1 Gaia DR2 4104083251293389696 HD 170902 HR 6956
GC 25303 BD BD-14 5098 Distance 82.17 Distance ly 268.04
 
 
ORBITAL ELEMENTS
 
 
Period (P)5.628y Periastron (T)2012.269y Semi-major axis (a)0.056a
Eccentricity (e)0.218 Inclination (i)118.3° Longitude of periastron (ω)72.8°
Node (Ω)225.1° Notesn ReferenceTok2017c
Equinox2000 Last observation2017 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 233.2 0.052
2001 170.4 0.024
2002 54.6 0.051
2003 25.6 0.055
2004 335.3 0.034
2005 258.4 0.043
2006 219.5 0.047
2007 99.7 0.025
2008 43.1 0.058
2009 12.5 0.047
2010 302.4 0.032
2011 242.4 0.050
2012 199.2 0.035
2013 65.9 0.041
2014 33.0 0.058
2015 353.6 0.039
2016 273.1 0.038
2017 229.1 0.051
2018 149.0 0.021
2019 50.6 0.054
2020 21.9 0.053
2021 325.5 0.033
2022 252.9 0.045
2023 214.4 0.044
2024 85.2 0.030
2025 39.9 0.059
2026 7.4 0.045
2027 292.4 0.033
2028 238.2 0.051
2029 188.7 0.030
2030 60.2 0.046


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



 
 


wds18323-1439e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic