17161+2316 COU 315
17h 16m 07.60s +23° 15' 36.9" P.A. 117.00 sep 0.1 mag 9.30,10.10 Sp K0+K2 dist. 250 pc (815.5 l.y.)
| Coord 2000 |
17161+2316 |
|
Discov num |
COU 315 |
|
Comp |
|
|
Coord arcsec 2000 |
17 16 07.60 +23 15 36.9 |
|
| Date first |
1968 |
|
Date last |
2014 |
|
Obs |
24 |
|
| Pa first |
163 |
|
Pa last |
117.2 |
|
P.A. Now (θ) |
117.2° |
|
| Sep first |
0.2 |
|
Sep last |
0.1 |
|
Sep. Now (ρ) |
0.1" |
|
| Mag pri |
9.30 |
|
Mag sec |
10.10 |
|
delta mag (ΔM) |
0.8 |
|
Spectral class |
K0+K2 (yellow-orange/yellow-orange) |
|
| Pri motion ra |
-003 |
|
Sec motion ra |
|
|
| Pri motion dec |
+014 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
HIP |
84468 |
|
Tycho2 |
2061-00874-1 |
|
Gaia DR2 |
4568569808114360448 |
|
| BD |
BD+23 3071 |
|
Distance |
250 |
|
Distance ly |
815.5 |
|
ORBITAL ELEMENTS
| Period (P) | 90.5y | ± 1 |
Periastron (T) | 2012.83y | ± 0.05 |
Semi-major axis (a) | 0.506a | ± 0.005 |
| Eccentricity (e) | 0.975 | ± 0.004 |
Inclination (i) | 100.4° | ± 4 |
Longitude of periastron (ω) | 89.3° | ± 15 |
| Node (Ω) | 103.4° | ± 4 |
Notes | n | |
Reference | Doc2010h | |
| Equinox | 2000 | |
Last observation | 2007 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
151.6 |
0.151 |
| 2001 |
149.8 |
0.149 |
| 2002 |
147.9 |
0.146 |
| 2003 |
146.0 |
0.143 |
| 2004 |
143.9 |
0.140 |
| 2005 |
141.8 |
0.136 |
| 2006 |
139.5 |
0.132 |
| 2007 |
137.0 |
0.126 |
| 2008 |
134.4 |
0.120 |
| 2009 |
131.3 |
0.113 |
| 2010 |
138.1 |
0.129 |
| 2011 |
123.5 |
0.090 |
| 2012 |
117.0 |
0.068 |
| 2013 |
280.5 |
0.033 |
| 2014 |
268.0 |
0.080 |
| 2015 |
262.9 |
0.099 |
| 2016 |
259.2 |
0.112 |
| 2017 |
154.0 |
0.154 |
| 2018 |
253.7 |
0.130 |
| 2019 |
251.4 |
0.136 |
| 2020 |
249.3 |
0.142 |
| 2021 |
247.3 |
0.146 |
| 2022 |
245.5 |
0.150 |
| 2023 |
243.7 |
0.154 |
| 2024 |
242.0 |
0.157 |
| 2025 |
240.4 |
0.160 |
| 2026 |
238.8 |
0.163 |
| 2027 |
237.3 |
0.165 |
| 2028 |
235.8 |
0.167 |
| 2029 |
234.4 |
0.169 |
| 2030 |
232.9 |
0.170 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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|
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Measures: green=micrometric, blue=interferometric, purple=photographic |
|
WDS 17161+2316 COU 315 : NOTES
| discov_num |
notes |
refcode |
| COU 315 |
Docobo et al. (2010) derive a dynamic parallax of 21.48 +/- 0.50 mas |
Doc2010h |
|
and a total mass of 1.60 +/- 0.12 Msun. |
|
REFERENCES
| refcode |
metd |
author |
reference |
| Doc2010h |
S j |
Docobo, J.A., Tamazian, V.S., Balega, Y.Y., & Melikian, N.D. |
2010AJ....140.1078D |
| Doc2010h |
+orb |
AJ 140, 1078, 2010 |
|
DISCOVERER
| idgroup |
discov |
author |
| 1 |
COU |
Couteau, P. |
WDS HISTORIC DATA
| coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
| 17161+2316 |
COU 315 |
|
1996 |
19 |
161 |
0.2 |
9.10 |
9.10 |
K0 |
O |
171607.60+231536.9 |
| 17161+2316 |
COU 315 |
|
2008 |
20 |
133 |
0.1 |
9.10 |
9.10 |
K0 |
O |
171607.60+231536.9 |
| 17161+2316 |
COU 315 |
|
2012 |
23 |
128 |
0.1 |
9.30 |
10.10 |
K0+K2 |
NO |
171607.60+231536.9 |
| 17161+2316 |
COU 315 |
|
2014 |
24 |
117 |
0.1 |
9.30 |
10.10 |
K0+K2 |
NO |
171607.60+231536.9 |
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WDS 17161+2316 COU 315 : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 17161+2316 COU 315 : MEASURES
No records found.
WDS 17161+2316 : VIRTUAL EYEPIECE
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WDS 17161+2316 : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.
