18440+0321 A 2388 (HD 173196)

 
 
18h 43m 59.30s +03° 20' 38.2" P.A. 131.00 sep 0.3 mag 8.59,9.56 Sp A0 dist. 209.64 pc (683.85 l.y.)
 
 
Coord 2000 18440+0321 Discov num A  2388 Comp Coord arcsec 2000 18 43 59.30 +03 20 38.2
Date first 1910 Date last 2017 Obs 24
Pa first 56 Pa last 130.8 P.A. Now (θ) 130.8°
Sep first 0.3 Sep last 0.261 Sep. Now (ρ) 0.261"
Mag pri 8.59 Mag sec 9.56 delta mag (ΔM) 0.97 Spectral class A0 (white)
Pri motion ra +004 Sec motion ra
Pri motion dec -018 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 173196 Constellation Serpens SAO 123862 HIP 91893
Tycho2 0451-00548-1 Gaia DR2 4280238139460761728 HD 173196 ADS 11619
BD BD+03 3787 Distance 209.64 Distance ly 683.85
 
 
ORBITAL ELEMENTS
 
 
Period (P)330y Periastron (T)1942.4y Semi-major axis (a)0.453a
Eccentricity (e)0.85 Inclination (i)70.3° Longitude of periastron (ω)96°
Node (Ω)254.7° Notes ReferenceFMR2014c
Equinox2000 Last observation2012 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 122.5 0.251
2001 123.1 0.252
2002 123.7 0.252
2003 124.4 0.252
2004 125.0 0.253
2005 125.6 0.253
2006 126.2 0.253
2007 126.9 0.254
2008 127.5 0.254
2009 128.1 0.254
2010 128.7 0.254
2011 129.3 0.255
2012 129.9 0.255
2013 130.5 0.255
2014 131.2 0.255
2015 131.8 0.255
2016 132.4 0.256
2017 133.0 0.256
2018 133.6 0.256
2019 134.2 0.256
2020 134.8 0.257
2021 135.4 0.257
2022 136.0 0.257
2023 136.6 0.257
2024 137.2 0.258
2025 137.8 0.258
2026 138.4 0.258
2027 139.0 0.258
2028 139.6 0.258
2029 140.2 0.259
2030 140.8 0.259


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


 
  


wds18440%2B0321a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic