15307+3810 HU 1163 (HD 138439)

 
 
15h 30m 44.95s +38° 09' 48.7" P.A. 178.00 sep 0.3 mag 9.23,9.73 Sp G5 dist. 243.31 pc (793.68 l.y.)
 
 
Coord 2000 15307+3810 Discov num HU 1163 Comp Coord arcsec 2000 15 30 44.95 +38 09 48.7
Date first 1905 Date last 2015 Obs 66
Pa first 266 Pa last 177.6 P.A. Now (θ) 194.1°
Sep first 0.4 Sep last 0.252 Sep. Now (ρ) 0.266"
Mag pri 9.23 Mag sec 9.73 delta mag (ΔM) 0.5 Spectral class G5 (yellow)
Pri motion ra +000 Sec motion ra
Pri motion dec -025 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 138439 Constellation Bootes SAO 64747 HIP 75949
Tycho2 3052-01446-1 HD 138439 ADS 9682 BD BD+38 2668
Distance 243.31 Distance ly 793.68
 
 
ORBITAL ELEMENTS
 
 
Period (P)217y± 20 Periastron (T)1989.21y± 0.49 Semi-major axis (a)0.285a± 0.011
Eccentricity (e)0.603± 0.022 Inclination (i)23.2°± 5.1 Longitude of periastron (ω)305°± 14
Node (Ω)123°± 12 Notesn ReferenceHrt2000a
Equinox2000 Last observation1997 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 139.3 0.153
2001 143.4 0.158
2002 147.2 0.163
2003 150.8 0.169
2004 154.2 0.174
2005 157.3 0.179
2006 160.3 0.185
2007 163.1 0.190
2008 165.8 0.195
2009 168.3 0.200
2010 170.8 0.205
2011 173.0 0.210
2012 175.2 0.215
2013 177.3 0.220
2014 179.3 0.225
2015 181.2 0.230
2016 183.1 0.234
2017 184.8 0.239
2018 186.5 0.244
2019 188.1 0.248
2020 189.7 0.253
2021 191.2 0.257
2022 192.7 0.261
2023 194.1 0.266
2024 195.5 0.270
2025 196.8 0.274
2026 198.1 0.278
2027 199.4 0.282
2028 200.6 0.286
2029 201.8 0.290
2030 203.0 0.294


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


 
  


wds15307%2B3810a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic