18359+1659 STT 358AB

 
 
18H 35M 53.22S +16 58' 32.5" P.A. 144.8 SEP 1.49 MAG 6.94,7.08 SP F8V DIST. 32.88 PC (107.25 L.Y.)
 
 
Coord 2000
18359+1659
Discov num
STT 358
Comp
AB
Coord arcsec 2000
18 35 53.22 +16 58 32.5
Date first
1843
Date last
2015
Obs
485
Pa first
224
Pa last
148
P.A. Now (θ)
144.8°
Sep first
0.8
Sep last
1.6
Sep. Now (ρ)
1.49"
Mag pri
6.94
Mag sec
7.08
delta mag (ΔM)
0.14
Spectral class
F8V (yellow-white)
Pri motion ra
+049
Sec motion ra
+050
Pri motion dec
-071
Sec motion dec
-067
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
18359+1659 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 103886 18359+1659 STT 358 AB 1843 2015 485 145 1.5 6.94 7.08 0.14 Y <===
Show 103886 18359+1659 STT 358 AB,C 1896 2012 12 235 198.7 6.74 8.50 1.76
Show 103886 18359+1659 SLE 214 AB,D 1982 2010 5 224 134.6 6.74 13.43 6.69
Show 103886 18359+1659 RED 25 AB,E 1953 2013 6 349 34.7 6.74 12.00 5.26
Show 103883 18359+1659 SLE 214 CD 1982 2001 4 77 72.5 8.50 13.43 4.93
Quintuple system
6 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
103886
HIP
91159
Tycho2
1574-01664-1
HD
171746
HR
6981
ADS
11483
BD
BD+16 3560
Distance
32.88
Distance ly
107.25
last precise pa
148.2
last precise sep
1.57
 
 
ORBITAL ELEMENTS
 
 
Period (P)380y Periastron (T)1816y Semi-major axis (a)1.835a
Eccentricity (e)0.57 Inclination (i)119° Longitude of periastron (ω)74°
Node (Ω)30.8° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 1.596 154.5
2001 1.590 154.0
2002 1.584 153.5
2003 1.578 153.0
2004 1.572 152.4
2005 1.566 151.9
2006 1.560 151.4
2007 1.554 150.9
2008 1.548 150.4
2009 1.542 149.8
2010 1.536 149.3
2011 1.530 148.7
2012 1.525 148.2
2013 1.519 147.6
2014 1.513 147.1
2015 1.507 146.5
2016 1.502 146.0
2017 1.496 145.4
2018 1.490 144.8
2019 1.485 144.3
2020 1.479 143.7
2021 1.474 143.1
2022 1.469 142.5
2023 1.463 141.9
2024 1.458 141.3
2025 1.453 140.7
2026 1.447 140.1
2027 1.442 139.5
2028 1.437 138.9
2029 1.432 138.3
2030 1.427 137.7

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic