18500+1519 YSC  12AB

 
 
18h 50m 02.00s +15 18' 40.3" P.A. 227 sep 0.5 mag 7.60,11.30 Sp F8+M2V dist. 53.22 pc (173.6 l.y.)
 
 
Coord 2000
18500+1519
Discov num
YSC  12
Comp
AB
Coord arcsec 2000
18 50 02.00 +15 18 40.3
Date first
2001
Date last
2015
Obs
7
Pa first
77
Pa last
227
P.A. Now (θ)
227°
Sep first
0.4
Sep last
0.5
Sep. Now (ρ)
0.5"
Mag pri
7.60
Mag sec
11.30
delta mag (ΔM)
3.7
Spectral class
F8+M2V (yellow-white/red)
Pri motion ra
+102
Sec motion ra
Pri motion dec
+131
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
18500+1519 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18500+1519 YSC 12 AB 2001 2015 7 227 0.5 7.60 11.30 3.70 Y <===
Show 18500+1519 LLO 16 AC 1999 2001 2 19 11.1 5.99 13.30 7.31
Show 18500+1519 LLO 16 AD 1999 2001 2 228 15.0 5.99 13.50 7.51
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
226.7
Precise sep
0.485
Cdsa2 id
YSC 12 AB
Constellation
Hercules
HIP
92418
HD
174457
Ra deg
18.833888888888886
De deg
15.311194444444444
Distance
53.22
Distance ly
173.6
last precise pa
226.7
last precise sep
0.485
 
 
ORBITAL ELEMENTS
 
 
Period (P)1.9493y± 0.0071 Periastron (T)2000.949y± 0.056 Semi-major axis (a)0.673a± 0.041
Eccentricity (e)0.091± 0.023 Inclination (i)77.3°± 1.7 Longitude of periastron (ω)103.8°± 5.9
Node (Ω)239.7°± 1 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.272 205.2
2001 0.287 34.6
2002 0.348 215.1
2003 0.381 43.1
2004 0.425 221.3
2005 0.466 48.3
2006 0.495 225.7
2007 0.538 52.0
2008 0.558 229.1
2009 0.594 54.8
2010 0.610 231.8
2011 0.632 57.3
2012 0.649 234.1
2013 0.653 59.5
2014 0.675 236.3
2015 0.655 61.7
2016 0.685 238.3
2017 0.639 63.9
2018 0.679 240.2
2019 0.608 66.3
2020 0.656 242.3
2021 0.562 69.0
2022 0.617 244.6
2023 0.504 72.3
2024 0.561 247.3
2025 0.436 76.5
2026 0.490 250.6
2027 0.362 82.4
2028 0.406 255.3
2029 0.285 91.4
2030 0.314 262.5

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

grafico orbita





wds18500%2B1519g.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
18500+1519 YSC 12 AB 2015 6 47 0.5 7.60 11.30 F8+M2V NO 185002.00+151840.3

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