15307+3810 HU 1163

 
 
15H 30M 44.95S +38 09' 48.7" P.A. 186.5 SEP 0.24 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
2010
Obs
63
Pa first
266
Pa last
349
P.A. Now (θ)
186.5°
Sep first
0.4
Sep last
0.2
Sep. Now (ρ)
0.24"
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
 
 
Constellation
Corona Borealis
SAO
64747
HIP
75949
Tycho2
3052-01446-1
HD
138439
ADS
9682
BD
BD+38 2668
Distance
243.31
Distance ly
793.68
last precise pa
348.5
last precise sep
0.224
 
 
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 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.153 139.3
2001 0.158 143.4
2002 0.163 147.2
2003 0.169 150.8
2004 0.174 154.2
2005 0.179 157.3
2006 0.185 160.3
2007 0.190 163.1
2008 0.195 165.8
2009 0.200 168.3
2010 0.205 170.8
2011 0.210 173.0
2012 0.215 175.2
2013 0.220 177.3
2014 0.225 179.3
2015 0.230 181.2
2016 0.234 183.1
2017 0.239 184.8
2018 0.244 186.5
2019 0.248 188.1
2020 0.253 189.7
2021 0.257 191.2
2022 0.261 192.7
2023 0.266 194.1
2024 0.270 195.5
2025 0.274 196.8
2026 0.278 198.1
2027 0.282 199.4
2028 0.286 200.6
2029 0.290 201.8
2030 0.294 203.0

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic