16341+4226 LAB   4 (Sig Her)

 
 
16h 34m 06.19s +42 26' 12.8" P.A. 0.4 sep 0.07 mag 4.20,7.70 Sp B9V dist. 96.53 pc (314.88 l.y.)
 
 
Coord 2000
16341+4226
Discov num
LAB   4
Comp
Coord arcsec 2000
16 34 06.19 +42 26 12.8
Date first
1972
Date last
2008
Obs
69
Pa first
179
Pa last
15
P.A. Now (θ)
0.4°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.07"
Mag pri
4.20
Mag sec
7.70
delta mag (ΔM)
3.5
Spectral class
B9V (blue-white)
Pri motion ra
-011
Sec motion ra
Pri motion dec
+046
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
14.9
Precise sep
0.113
Name
Sig Her
Cdsa2 id
LAB 4
Constellation
Hercules
SAO
46161
HIP
81126
Tycho2
3066-02213-1
HD
149630
HR
6168
GC
22296
BD
BD+42 2724
Bayer
Sigma Herculis
Bayer name
Sig Her
Flamsteed
35 Herculis
Flamsteed name
35 Her
Ra deg
16.56838611111111
De deg
42.43688888888889
Distance
96.53
Distance ly
314.88
last precise pa
14.9
last precise sep
0.113
 
 
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 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2004
label rho theta
2000-01-01 0.099 20.5
2001-01-01 0.115 15.1
2002-01-01 0.107 10.1
2003-01-01 0.076 2.6
2004-01-01 0.024 329.4
2005-01-01 0.037 193.7
2006-01-01 0.032 45.3
2007-01-01 0.085 23.6
2008-01-01 0.111 17.1
2009-01-01 0.113 12.2
2010-01-01 0.092 6.3
2011-01-01 0.047 352.4
2012-01-01 0.026 217.7
2013-01-01 0.014 120.0
2014-01-01 0.067 28.1
2015-01-01 0.104 19.4
2016-01-01 0.115 14.2
2017-01-01 0.103 9.0
2018-01-01 0.068 0.4
2019-01-01 0.016 299.2
2020-01-01 0.032 184.3
2021-01-01 0.043 37.0
2022-01-01 0.092 22.1
2023-01-01 0.113 16.2
2024-01-01 0.111 11.3
2025-01-01 0.086 4.8
2026-01-01 0.037 345.8
2027-01-01 0.034 204.8
2028-01-01 0.019 70.3
2029-01-01 0.075 25.8
2030-01-01 0.107 18.3

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds16341%2B4226c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
16341+4226 LAB 4 2008 48 15 0.1 4.20 7.70 B9V NOD 163406.19+422612.8

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