17116+3916 HU 1178 AB
17h 11m 34.85s +39° 15' 31.4" P.A. 8.00 sep 0.3 mag 9.16,9.31 Sp F8 dist. 117.51 pc (383.32 l.y.)
| Coord 2000 |
17116+3916 |
|
Discov num |
HU 1178 |
|
Comp |
AB |
|
Coord arcsec 2000 |
17 11 34.85 +39 15 31.4 |
|
| Date first |
1905 |
|
Date last |
2016 |
|
Obs |
30 |
|
| Pa first |
10 |
|
Pa last |
8.1 |
|
P.A. Now (θ) |
8.1° |
|
| Sep first |
0.3 |
|
Sep last |
0.335 |
|
Sep. Now (ρ) |
0.335" |
|
| Mag pri |
9.16 |
|
Mag sec |
9.31 |
|
delta mag (ΔM) |
0.15 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
-056 |
|
Sec motion ra |
|
|
| Pri motion dec |
+003 |
|
Sec motion dec |
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|
| Notes |
O
(Orbital solution) |
|
This double is physical.
17116+3916 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
65857 |
17 11 35 +39 15 31 |
HU 1178 AB |
2016 |
30 |
8 |
0.3 |
9.16 |
9.31 |
0.15 |
Y |
<=== |
| Show |
HD 155727 |
65857 |
17 11 35 +39 15 31 |
STF 2136 AB,C |
2020 |
24 |
112 |
15.3 |
8.47 |
10.48 |
2.01 |
|
|
| Show |
|
65857 |
17 11 35 +39 15 31 |
WAL 78 AB,E |
2020 |
8 |
311 |
57.4 |
8.47 |
12.84 |
4.37 |
|
|
| Show |
|
|
17 11 36 +39 15 26 |
HU 1178 CD |
2016 |
10 |
77 |
1.4 |
10.48 |
13.50 |
3.02 |
|
|
Quintuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
SAO |
65857 |
|
HIP |
84100 |
|
Tycho2 |
3073-00914-1 |
|
| HD |
155727 |
|
GC |
23213 |
|
ADS |
10391 |
|
BD |
BD+39 3086 |
|
| Distance |
117.51 |
|
Distance ly |
383.32 |
|
ORBITAL ELEMENTS
| Period (P) | 761.8y | |
Periastron (T) | 1955.56y | |
Semi-major axis (a) | 0.931a | |
| Eccentricity (e) | 0.627 | |
Inclination (i) | 93° | |
Longitude of periastron (ω) | 318° | |
| Node (Ω) | 13.5° | |
Notes | | |
Reference | Zir2012 | |
| Equinox | 2000 | |
Last observation | 2010 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
10.7 |
0.392 |
| 2001 |
10.6 |
0.389 |
| 2002 |
10.5 |
0.387 |
| 2003 |
10.4 |
0.384 |
| 2004 |
10.2 |
0.381 |
| 2005 |
10.1 |
0.377 |
| 2006 |
10.0 |
0.374 |
| 2007 |
9.9 |
0.371 |
| 2008 |
9.8 |
0.367 |
| 2009 |
9.6 |
0.364 |
| 2010 |
9.5 |
0.360 |
| 2011 |
9.4 |
0.356 |
| 2012 |
9.3 |
0.353 |
| 2013 |
9.1 |
0.349 |
| 2014 |
9.0 |
0.345 |
| 2015 |
8.8 |
0.341 |
| 2016 |
8.7 |
0.337 |
| 2017 |
8.5 |
0.332 |
| 2018 |
8.4 |
0.328 |
| 2019 |
8.2 |
0.324 |
| 2020 |
8.1 |
0.319 |
| 2021 |
7.9 |
0.315 |
| 2022 |
7.7 |
0.310 |
| 2023 |
7.6 |
0.306 |
| 2024 |
7.4 |
0.301 |
| 2025 |
7.2 |
0.296 |
| 2026 |
7.0 |
0.292 |
| 2027 |
6.8 |
0.287 |
| 2028 |
6.6 |
0.282 |
| 2029 |
6.4 |
0.277 |
| 2030 |
6.2 |
0.272 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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