18384-0312 A 88 AB

 
 
18h 38m 23.80s -03° 11' 37.4" P.A. 13.00 sep 0.1 mag 7.22,7.51 Sp F9V dist. 47.96 pc (156.45 l.y.)
 
 
Coord 2000 18384-0312 Discov num A    88 Comp AB Coord arcsec 2000 18 38 23.80 -03 11 37.4
Date first 1900 Date last 2020 Obs 170
Pa first 353 Pa last 12.9 P.A. Now (θ) 333.2°
Sep first 0.1 Sep last 0.113 Sep. Now (ρ) 0.148"
Mag pri 7.22 Mag sec 7.51 delta mag (ΔM) 0.29 Spectral class F9V (yellow-white)
Pri motion ra +007 Sec motion ra
Pri motion dec +037 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
18384-0312 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 142461 18 38 24 -03 11 37 A 88 AB 2020 170 13 0.1 7.22 7.51 0.29 Y <===
Show 142461 18 38 24 -03 11 37 A 88 AB,C 1998 6 115 18.5 5.87 14.00 8.13
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Serpens SAO 142461 HIP 91394 Tycho2 5117-02162-1
Gaia DR2 4259305018664587648 HD 172088 HR 6999 GC 25481
ADS 11520 BD BD-03 4331 Distance 47.96 Distance ly 156.45
 
 
ORBITAL ELEMENTS
 
 
Period (P)12.135y± 0.006 Periastron (T)2007.18y± 0.04 Semi-major axis (a)0.1461a± 0.0008
Eccentricity (e)0.2567± 0.0029 Inclination (i)123.9°± 5 Longitude of periastron (ω)79.7°± 1.5
Node (Ω)173.4°± 0.9 Notesn ReferenceHrt2013d
Equinox2000 Last observation Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 310.3 0.126
2001 284.8 0.107
2002 252.8 0.102
2003 222.9 0.114
2004 200.2 0.131
2005 181.5 0.136
2006 160.4 0.114
2007 116.0 0.068
2008 36.5 0.080
2009 3.8 0.127
2010 346.4 0.149
2011 331.1 0.146
2012 313.1 0.129
2013 288.7 0.109
2014 257.2 0.102
2015 226.5 0.112
2016 202.9 0.129
2017 184.0 0.137
2018 163.8 0.119
2019 125.3 0.073
2020 44.3 0.074
2021 6.8 0.122
2022 348.5 0.148
2023 333.2 0.148
2024 315.9 0.132
2025 292.5 0.112
2026 261.7 0.102
2027 230.3 0.110
2028 205.7 0.127
2029 186.5 0.137
2030 167.0 0.123


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



 
 


wds18384-0312b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic