16413+3136 STF 2084 (Zet Her)
16h 41m 17.16s +31° 36' 09.8" P.A. 110.00 sep 1.6 mag 2.95,5.40 Sp G1IV dist. 10.72 pc (34.97 l.y.)
| Coord 2000 |
16413+3136 |
|
Discov num |
STF2084 |
|
Comp |
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Coord arcsec 2000 |
16 41 17.16 +31 36 09.8 |
|
| Date first |
1826 |
|
Date last |
2019 |
|
Obs |
862 |
|
| Pa first |
23 |
|
Pa last |
110.3 |
|
P.A. Now (θ) |
90.4° |
|
| Sep first |
0.9 |
|
Sep last |
1.63 |
|
Sep. Now (ρ) |
1.53" |
|
| Mag pri |
2.95 |
|
Mag sec |
5.40 |
|
delta mag (ΔM) |
2.45 |
|
Spectral class |
G1IV (yellow) |
|
| Pri motion ra |
-463 |
|
Sec motion ra |
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|
| Pri motion dec |
+345 |
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Sec motion dec |
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| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
Zet Her |
|
Var name |
NSV7915 Her |
|
Constellation |
Hercules |
|
SAO |
65485 |
|
| HIP |
81693 |
|
Tycho2 |
2582-03158-1 |
|
HD |
150680 |
|
HR |
6212 |
|
| GC |
22464 |
|
ADS |
10157 |
|
GL |
Gl 635A |
|
BD |
BD+31 2884 |
|
| Bayer |
Zeta Herculis |
|
Bayer name |
Zet Her |
|
Flamsteed |
40 Herculis |
|
Flamsteed name |
40 Her |
|
| Distance |
10.72 |
|
Distance ly |
34.97 |
|
Bayer greek |
ζ Her |
|
ORBITAL ELEMENTS
| Period (P) | 34.4638y | ± 0.0251 |
Periastron (T) | 1933.3518y | ± 0.0492 |
Semi-major axis (a) | 1.32834a | ± 0.00807 |
| Eccentricity (e) | 0.46342 | ± 0.00417 |
Inclination (i) | 131.6° | ± 0.578 |
Longitude of periastron (ω) | 113.177° | ± 0.803 |
| Node (Ω) | 50.601° | ± 0.746 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
12.9 |
0.714 |
| 2001 |
343.9 |
0.533 |
| 2002 |
299.7 |
0.493 |
| 2003 |
263.3 |
0.624 |
| 2004 |
241.4 |
0.789 |
| 2005 |
226.5 |
0.915 |
| 2006 |
214.7 |
0.997 |
| 2007 |
204.4 |
1.046 |
| 2008 |
194.8 |
1.075 |
| 2009 |
185.6 |
1.094 |
| 2010 |
176.6 |
1.108 |
| 2011 |
167.9 |
1.124 |
| 2012 |
159.4 |
1.142 |
| 2013 |
151.3 |
1.166 |
| 2014 |
143.5 |
1.194 |
| 2015 |
136.1 |
1.228 |
| 2016 |
129.1 |
1.265 |
| 2017 |
122.6 |
1.306 |
| 2018 |
116.4 |
1.348 |
| 2019 |
110.6 |
1.391 |
| 2020 |
105.2 |
1.431 |
| 2021 |
100.0 |
1.469 |
| 2022 |
95.1 |
1.503 |
| 2023 |
90.4 |
1.530 |
| 2024 |
85.8 |
1.549 |
| 2025 |
81.3 |
1.559 |
| 2026 |
76.9 |
1.557 |
| 2027 |
72.4 |
1.542 |
| 2028 |
67.7 |
1.511 |
| 2029 |
62.8 |
1.461 |
| 2030 |
57.5 |
1.389 |
|
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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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