17121+4540 KUI 79 AB (HD 155876)
17h 12m 07.78s +45° 39' 57.6" P.A. 289.00 sep 0.7 mag 10.02,10.25 Sp M3V dist. 5.98 pc (19.51 l.y.)
| Coord 2000 |
17121+4540 |
|
Discov num |
KUI 79 |
|
Comp |
AB |
|
Coord arcsec 2000 |
17 12 07.78 +45 39 57.6 |
|
| Date first |
1934 |
|
Date last |
2018 |
|
Obs |
237 |
|
| Pa first |
229 |
|
Pa last |
289.4 |
|
P.A. Now (θ) |
242.2° |
|
| Sep first |
1.1 |
|
Sep last |
0.662 |
|
Sep. Now (ρ) |
1.139" |
|
| Mag pri |
10.02 |
|
Mag sec |
10.25 |
|
delta mag (ΔM) |
0.23 |
|
Spectral class |
M3V (red) |
|
| Pri motion ra |
+022 |
|
Sec motion ra |
|
|
| Pri motion dec |
-162 |
|
Sec motion dec |
|
|
| Notes |
N
O
P
(See Notes, Orbital solution, 100-year proper motion) |
|
This double is physical.
17121+4540 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 155876 |
|
17 12 08 +45 39 58 |
KUI 79 AB |
2018 |
237 |
289 |
0.7 |
10.02 |
10.25 |
0.23 |
Y |
<=== |
| Show |
|
|
17 12 08 +45 39 58 |
KUI 79 AB,C |
2013 |
6 |
343 |
157.4 |
9.52 |
13.30 |
3.78 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 155876 |
|
Constellation |
Hercules |
|
HIP |
84140 |
|
Tycho2 |
3501-01952-1 |
|
| HD |
155876 |
|
GL |
Gl 661A |
|
BD |
BD+45 2505 |
|
Distance |
5.98 |
|
| Distance ly |
19.51 |
|
ORBITAL ELEMENTS
| Period (P) | 12.9551y | ± 0.0043 |
Periastron (T) | 57730d (2016.935y) | ± 1.9 |
Semi-major axis (a) | 776.12m | ± 1.01 |
| Eccentricity (e) | 0.75167 | ± 0.00062 |
Inclination (i) | 146.96° | ± 0.26 |
Longitude of periastron (ω) | 98.31° | ± 0.58 |
| Node (Ω) | 159.18° | ± 0.67 |
Notes | n | |
Reference | MnA2019 | |
| Equinox | | |
Last observation | | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
220.8 |
1.055 |
| 2001 |
211.6 |
0.950 |
| 2002 |
199.4 |
0.788 |
| 2003 |
178.1 |
0.535 |
| 2004 |
52.3 |
0.164 |
| 2005 |
303.7 |
0.525 |
| 2006 |
281.0 |
0.757 |
| 2007 |
267.8 |
0.916 |
| 2008 |
258.1 |
1.027 |
| 2009 |
249.9 |
1.099 |
| 2010 |
242.5 |
1.138 |
| 2011 |
235.5 |
1.144 |
| 2012 |
228.3 |
1.116 |
| 2013 |
220.4 |
1.051 |
| 2014 |
211.2 |
0.944 |
| 2015 |
198.7 |
0.779 |
| 2016 |
176.6 |
0.520 |
| 2017 |
37.5 |
0.173 |
| 2018 |
302.3 |
0.538 |
| 2019 |
280.3 |
0.765 |
| 2020 |
267.3 |
0.922 |
| 2021 |
257.7 |
1.031 |
| 2022 |
249.6 |
1.102 |
| 2023 |
242.2 |
1.139 |
| 2024 |
235.1 |
1.143 |
| 2025 |
227.9 |
1.114 |
| 2026 |
220.0 |
1.048 |
| 2027 |
210.7 |
0.938 |
| 2028 |
198.0 |
0.769 |
| 2029 |
175.0 |
0.505 |
| 2030 |
24.6 |
0.187 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
