17121+4540 KUI  79AB

 
 
17h 12m 07.78s +45 39' 57.6" P.A. 39.1 sep 0.18 mag 10.02,10.25 Sp K5 dist. 5.98 pc (19.51 l.y.)
 
 
Coord 2000
17121+4540
Discov num
KUI  79
Comp
AB
Coord arcsec 2000
17 12 07.78 +45 39 57.6
Date first
1934
Date last
2011
Obs
214
Pa first
229
Pa last
232
P.A. Now (θ)
39.1°
Sep first
1.1
Sep last
1.1
Sep. Now (ρ)
0.18"
Mag pri
10.02
Mag sec
10.25
delta mag (ΔM)
0.23
Spectral class
K5 (yellow-orange)
Pri motion ra
+022
Sec motion ra
Pri motion dec
-162
Sec motion dec
Notes
N O P (See Notes, Orbital solution, 100-year proper motion)
This double is physical.
 
 
17121+4540 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 17121+4540 KUI 79 AB 1934 2011 214 39 0.2 10.02 10.25 0.23 Y <===
Show 17121+4540 KUI 79 AB,C 1934 2013 6 343 157.4 9.52 13.30 3.78
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
232.3
Precise sep
1.139
Constellation
Hercules
HIP
84140
Tycho2
3501-01952-1
HD
155876
GL
Gl 661A
BD
BD+45 2505
Distance
5.98
Distance ly
19.51
last precise pa
232.3
last precise sep
1.139
 
 
ORBITAL ELEMENTS
 
 
Period (P)12.9512y± 0.0096 Periastron (T)1991.032y± 0.011 Semi-major axis (a)0.762a± 0.0015
Eccentricity (e)0.743± 0.008 Inclination (i)149.14°± 0.25 Longitude of periastron (ω)99°± 1
Node (Ω)160°± 1.3 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 1.053 221.0
2001 0.945 211.8
2002 0.780 199.3
2003 0.526 177.4
2004 0.170 54.1
2005 0.517 304.9
2006 0.751 281.6
2007 0.913 268.2
2008 1.026 258.3
2009 1.100 250.2
2010 1.139 242.8
2011 1.144 235.7
2012 1.115 228.5
2013 1.049 220.6
2014 0.938 211.3
2015 0.770 198.6
2016 0.510 175.8
2017 0.178 39.1
2018 0.531 303.2
2019 0.760 280.8
2020 0.919 267.6
2021 1.030 257.9
2022 1.102 249.8
2023 1.140 242.5
2024 1.143 235.4
2025 1.112 228.1
2026 1.044 220.2
2027 0.932 210.7
2028 0.760 197.8
2029 0.494 174.0
2030 0.192 25.8

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

grafico orbita





wds17121%2B4540a.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
17121+4540 KUI 79 AB 2002 197 196 0.7 10.02 10.25 K5 NODP 171207.62+454011.4
17121+4540 KUI 79 AB 2007 198 264 1.0 10.02 10.25 K5 NODP 171207.62+454011.4
17121+4540 KUI 79 AB 2008 200 255 1.0 10.02 10.25 K5 NODP 171207.62+454011.4
17121+4540 KUI 79 AB 2010 202 240 1.1 10.02 10.25 K5 NODP 171207.62+454011.4
17121+4540 KUI 79 AB 2011 214 232 1.1 10.02 10.25 K5 NO P 171207.78+453957.6

If you need more information about this double, apply for a data request form to the WDS.