18534+2553 A 2989 (HD 337117)

 
 
18h 53m 24.53s +25° 53' 05.3" P.A. 199.00 sep 0.3 mag 8.90,9.90 Sp F5
 
 
Coord 2000 18534+2553 Discov num A  2989 Comp Coord arcsec 2000 18 53 24.53 +25 53 05.3
Date first 1916 Date last 2016 Obs 16
Pa first 227 Pa last 199.4 P.A. Now (θ) 199.4°
Sep first 0.4 Sep last 0.309 Sep. Now (ρ) 0.309"
Mag pri 8.90 Mag sec 9.90 delta mag (ΔM) 1 Spectral class F5 (yellow-white)
Pri motion ra -052 Sec motion ra
Pri motion dec -022 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 337117 Constellation Hercules SAO 86545 Tycho2 2113-01304-1
Gaia DR2 4534878057425399296 HD 337117 ADS 11802
 
 
ORBITAL ELEMENTS
 
 
Period (P)175y Periastron (T)1968.3y Semi-major axis (a)0.74a
Eccentricity (e)0.978 Inclination (i)78.7° Longitude of periastron (ω)281.3°
Node (Ω)80.9° Notes ReferenceUSN2002
Equinox2000 Last observation1995 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 189.2 0.217
2001 190.2 0.222
2002 191.1 0.226
2003 192.0 0.231
2004 192.8 0.235
2005 193.7 0.239
2006 194.5 0.244
2007 195.2 0.248
2008 195.9 0.252
2009 196.7 0.257
2010 197.3 0.261
2011 198.0 0.265
2012 198.7 0.269
2013 199.3 0.273
2014 199.9 0.277
2015 200.5 0.281
2016 201.1 0.285
2017 201.6 0.289
2018 202.2 0.293
2019 202.7 0.297
2020 203.2 0.300
2021 203.7 0.304
2022 204.2 0.308
2023 204.7 0.311
2024 205.2 0.315
2025 205.6 0.318
2026 206.1 0.322
2027 206.5 0.325
2028 206.9 0.329
2029 207.4 0.332
2030 207.8 0.335


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



 
 


wds18534%2B2553a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic