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 |
Notes | n | |
Reference | Hrt2000a | |
Equinox | 2000 | |
Last observation | 1997 | |
Grade | 3 | (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 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|