16413+3136 STF2084 (Zet Her)

 
 
16h 41m 17.16s +31 36' 09.8" P.A. 100.00 sep 1.5 mag 2.95,5.40 Sp G1IV dist. 10.72 pc (34.97 l.y.)
 
 
Coord 2000
16413+3136
Discov num
STF2084
Comp
Coord arcsec 2000
16 41 17.16 +31 36 09.8
Date first
1826
Date last
2019
Obs
856
Pa first
23
Pa last
110
P.A. Now (θ)
100°
Sep first
0.9
Sep last
1.6
Sep. Now (ρ)
1.47"
Mag pri
2.95
Mag sec
5.40
delta mag (ΔM)
2.45
Spectral class
G1IV (yellow)
Pri motion ra
-463
Sec motion ra
Pri motion dec
+345
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
110.3
Precise sep
1.63
Name
Zet 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
last precise pa
110.3
last precise sep
1.63
 
 
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 Note Grade1(1=Definitive, 9=Indet.)
Equinox Last observation2015
label rho theta
2000 0.714 12.9
2001 0.533 343.9
2002 0.493 299.7
2003 0.624 263.3
2004 0.789 241.4
2005 0.915 226.5
2006 0.997 214.7
2007 1.046 204.4
2008 1.075 194.8
2009 1.094 185.6
2010 1.108 176.6
2011 1.124 167.9
2012 1.142 159.4
2013 1.166 151.3
2014 1.194 143.5
2015 1.228 136.1
2016 1.265 129.1
2017 1.306 122.6
2018 1.348 116.4
2019 1.391 110.6
2020 1.431 105.2
2021 1.469 100.0
2022 1.503 95.1
2023 1.530 90.4
2024 1.549 85.8
2025 1.559 81.3
2026 1.557 76.9
2027 1.542 72.4
2028 1.511 67.7
2029 1.461 62.8
2030 1.389 57.5

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






wds16413%2B3136c.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
16413+3136 STF2084 2007 807 198 1.1 2.95 5.40 G1IV NOD 164117.46+313607.0
16413+3136 STF2084 2008 813 185 1.2 2.95 5.40 G1IV NOD 164117.46+313607.0
16413+3136 STF2084 2010 819 173 1.1 2.95 5.40 G1IV NOD 164117.46+313607.0
16413+3136 STF2084 2011 824 166 1.3 2.95 5.40 G1IV NOD 164117.46+313607.0
16413+3136 STF2084 2013 835 149 1.3 2.95 5.40 G1IV NOD 164117.46+313607.0
16413+3136 STF2084 2014 836 141 1.3 2.95 5.40 G1IV NOD 164117.46+313607.0
16413+3136 STF2084 2015 837 134 1.3 2.95 5.40 G1IV NO 164117.46+313607.0
16413+3136 STF2084 2016 840 126 1.5 2.95 5.40 G1IV NO 164117.16+313609.8
16413+3136 STF2084 2017 845 121 1.6 2.95 5.40 G1IV NO 164117.16+313609.8
16413+3136 STF2084 2018 846 115 1.6 2.95 5.40 G1IV NO 164117.16+313609.8
16413+3136 STF2084 2019 856 110 1.6 2.95 5.40 G1IV NO 164117.16+313609.8

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