18500+1519 YSC  12AB

 
 
18h 50m 02.00s +15 18' 40.3" P.A. 37.5 sep 0.48 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)
37.5°
Sep first
0.4
Sep last
0.5
Sep. Now (ρ)
0.48"
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 104160 18500+1519 YSC 12 AB 2001 2015 7 38 0.5 7.60 11.30 3.70 Y <===
Show 104160 18500+1519 LLO 16 AC 1999 2001 2 19 11.1 5.99 13.30 7.31
Show 104160 18500+1519 LLO 16 AD 1999 2015 3 225 15.7 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
Constellation
Hercules
SAO
104160
HIP
92418
Tycho2
1584-00540-1
Gaia DR2
4507523307652284288
HD
174457
BD
BD+15 3584
Distance
53.22
Distance ly
173.6
last precise pa
226.7
last precise sep
0.485
 
 
ORBITAL ELEMENTS
 
 
Period (P)105y Periastron (T)2121.131y Semi-major axis (a)0.486a
Eccentricity (e)0 Inclination (i)143.4° Longitude of periastron (ω)
Node (Ω)45.4° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2018
label rho theta
2000 0.424 94.6
2001 0.429 91.1
2002 0.435 87.6
2003 0.441 84.2
2004 0.446 80.9
2005 0.452 77.6
2006 0.457 74.5
2007 0.462 71.4
2008 0.467 68.4
2009 0.471 65.5
2010 0.475 62.5
2011 0.478 59.7
2012 0.481 56.9
2013 0.483 54.1
2014 0.485 51.3
2015 0.486 48.5
2016 0.486 45.8
2017 0.486 43.0
2018 0.485 40.2
2019 0.483 37.5
2020 0.481 34.7
2021 0.479 31.9
2022 0.476 29.0
2023 0.472 26.1
2024 0.468 23.2
2025 0.463 20.2
2026 0.458 17.1
2027 0.453 14.0
2028 0.448 10.8
2029 0.442 7.5
2030 0.436 4.1

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

grafico orbita





wds18500%2B1519a.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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