16341+4226 LAB 4 (Sig Her)
16h 34m 06.19s +42° 26' 12.8" P.A. 15.00 sep 0.1 mag 4.20,7.70 Sp B9V dist. 96.53 pc (314.88 l.y.)
Coord 2000 |
16341+4226 |
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Discov num |
LAB 4 |
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Comp |
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Coord arcsec 2000 |
16 34 06.19 +42 26 12.8 |
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Date first |
1972 |
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Date last |
2008 |
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Obs |
69 |
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Pa first |
179 |
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Pa last |
14.9 |
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P.A. Now (θ) |
16.2° |
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Sep first |
0.1 |
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Sep last |
0.113 |
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Sep. Now (ρ) |
0.113" |
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Mag pri |
4.20 |
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Mag sec |
7.70 |
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delta mag (ΔM) |
3.5 |
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Spectral class |
B9V (blue-white) |
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Pri motion ra |
-011 |
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Sec motion ra |
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Pri motion dec |
+046 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
Sig Her |
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Var name |
NSV7837 Her |
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Constellation |
Hercules |
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SAO |
46161 |
|
HIP |
81126 |
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Tycho2 |
3066-02213-1 |
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Gaia DR2 |
1357126587985344896 |
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HD |
149630 |
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HR |
6168 |
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GC |
22296 |
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BD |
BD+42 2724 |
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Bayer |
Sigma Herculis |
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Bayer name |
Sig Her |
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Flamsteed |
35 Herculis |
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Flamsteed name |
35 Her |
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FK5 |
621 |
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Distance |
96.53 |
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Distance ly |
314.88 |
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Bayer greek |
σ Her |
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ORBITAL ELEMENTS
Period (P) | 2706.19d (7.41y) | ± 4.89 |
Periastron (T) | 50665.4d (1997.593y) | ± 2.68 |
Semi-major axis (a) | 76.21m | ± 0.27 |
Eccentricity (e) | 0.5135 | ± 0.0028 |
Inclination (i) | 105.25° | ± 0.51 |
Longitude of periastron (ω) | 184.97° | ± 0.4 |
Node (Ω) | 14.95° | ± 0.47 |
Notes | n | |
Reference | NOI2016 | |
Equinox | 2000 | |
Last observation | 2004 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000-01-01 |
20.5 |
0.099 |
2001-01-01 |
15.1 |
0.115 |
2002-01-01 |
10.1 |
0.107 |
2003-01-01 |
2.6 |
0.076 |
2004-01-01 |
329.4 |
0.024 |
2005-01-01 |
193.7 |
0.037 |
2006-01-01 |
45.3 |
0.032 |
2007-01-01 |
23.6 |
0.085 |
2008-01-01 |
17.1 |
0.111 |
2009-01-01 |
12.2 |
0.113 |
2010-01-01 |
6.3 |
0.092 |
2011-01-01 |
352.4 |
0.047 |
2012-01-01 |
217.7 |
0.026 |
2013-01-01 |
120.0 |
0.014 |
2014-01-01 |
28.1 |
0.067 |
2015-01-01 |
19.4 |
0.104 |
2016-01-01 |
14.2 |
0.115 |
2017-01-01 |
9.0 |
0.103 |
2018-01-01 |
0.4 |
0.068 |
2019-01-01 |
299.2 |
0.016 |
2020-01-01 |
184.3 |
0.032 |
2021-01-01 |
37.0 |
0.043 |
2022-01-01 |
22.1 |
0.092 |
2023-01-01 |
16.2 |
0.113 |
2024-01-01 |
11.3 |
0.111 |
2025-01-01 |
4.8 |
0.086 |
2026-01-01 |
345.8 |
0.037 |
2027-01-01 |
204.8 |
0.034 |
2028-01-01 |
70.3 |
0.019 |
2029-01-01 |
25.8 |
0.075 |
2030-01-01 |
18.3 |
0.107 |
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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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