18118+3327 B 2545 AB

 
 
18h 11m 45.11s +33° 26' 49.3" P.A. 241.00 sep 0.1 mag 6.50,6.80 Sp A3V dist. 237.53 pc (774.82 l.y.)
 
 
Coord 2000 18118+3327 Discov num B  2545 Comp AB Coord arcsec 2000 18 11 45.11 +33 26 49.3
Date first 1958 Date last 2007 Obs 66
Pa first 233 Pa last 240.7 P.A. Now (θ) 198.9°
Sep first 0.1 Sep last 0.104 Sep. Now (ρ) 0.055"
Mag pri 6.50 Mag sec 6.80 delta mag (ΔM) 0.3 Spectral class A3V (white)
Pri motion ra +018 Sec motion ra
Pri motion dec +015 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
18118+3327 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 66733 18 11 45 +33 26 49 B 2545 AB 2007 66 241 0.1 6.50 6.80 0.30 Y <===
Show NSV10363 66733 18 11 45 +33 26 49 HO 82 AB,C 2016 34 221 0.7 6.08 8.99 2.91
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name NSV10363 Constellation Hercules SAO 66733 HIP 89156
Tycho2 2626-01763-1 Gaia DR2 4604984976092450816 HD 166988 HR 6814
GC 24829 ADS 11149 BD BD+33 3044 Distance 237.53
Distance ly 774.82
 
 
ORBITAL ELEMENTS
 
 
Period (P)23.9y± 1 Periastron (T)1971.81y± 0.81 Semi-major axis (a)0.062a± 0.0005
Eccentricity (e)0.706± 0.055 Inclination (i)37.9°± 5.8 Longitude of periastron (ω)172.1°± 19
Node (Ω)244.1°± 19 Notesn ReferenceHrt1989
Equinox2000 Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 206.9 0.066
2001 213.4 0.075
2002 218.5 0.084
2003 222.7 0.091
2004 226.5 0.096
2005 229.8 0.100
2006 232.9 0.103
2007 235.9 0.105
2008 238.8 0.105
2009 241.8 0.105
2010 244.8 0.103
2011 247.9 0.100
2012 251.3 0.095
2013 255.1 0.089
2014 259.5 0.082
2015 264.9 0.073
2016 272.1 0.062
2017 282.9 0.048
2018 303.3 0.033
2019 358.0 0.019
2020 94.2 0.019
2021 158.0 0.028
2022 185.1 0.042
2023 198.9 0.055
2024 207.6 0.067
2025 214.0 0.076
2026 219.0 0.084
2027 223.1 0.091
2028 226.8 0.097
2029 230.1 0.101
2030 233.2 0.103


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



 
 


wds18118%2B3327a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic