19553-0644 STF 2597 AB (HD 188405)

 
 
19h 55m 19.49s -06 44' 04.7" P.A. 100.00 sep 0.6 mag 6.94,7.98 Sp F2V dist. 81.83 pc (266.93 l.y.)
 
 
Coord 2000 19553-0644 Discov num STF2597 Comp AB Coord arcsec 2000 19 55 19.49 -06 44 04.7
Date first 1826 Date last 2017 Obs 143
Pa first 92 Pa last 100.1 P.A. Now (θ) 100.1°
Sep first 1.9 Sep last 0.647 Sep. Now (ρ) 0.647"
Mag pri 6.94 Mag sec 7.98 delta mag (ΔM) 1.04 Spectral class F2V (yellow-white)
Pri motion ra +030 Sec motion ra
Pri motion dec -062 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
19553-0644 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 188405 143911 19 55 19 -06 44 05 STF 2597 AB 2017 143 100 0.6 6.94 7.98 1.04 Y <===
Show 143911 19 55 19 -06 44 05 BOW 8 AC -1 0 -1 -1.0 6.94
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 188405 Constellation Aquila SAO 143911 HIP 98038
Tycho2 5159-02691-1 Gaia DR2 4196081588186245504 HD 188405 HR 7599
GC 27580 ADS 13104 BD BD-07 5102 Distance 81.83
Distance ly 266.93
 
 
ORBITAL ELEMENTS
 
 
Period (P)425y± 22 Periastron (T)1974.28y± 0.23 Semi-major axis (a)1.085a± 0.024
Eccentricity (e)0.9414± 0.002 Inclination (i)103.05°± 0.84 Longitude of periastron (ω)327.9°± 1.7
Node (Ω)264.03°± 0.77 Notesn ReferenceHrt1996a
Equinox2000 Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 104.1 0.445
2001 103.7 0.461
2002 103.4 0.478
2003 103.1 0.494
2004 102.8 0.510
2005 102.5 0.525
2006 102.2 0.541
2007 102.0 0.556
2008 101.7 0.571
2009 101.5 0.586
2010 101.3 0.601
2011 101.1 0.616
2012 100.9 0.630
2013 100.7 0.644
2014 100.5 0.658
2015 100.3 0.672
2016 100.2 0.686
2017 100.0 0.700
2018 99.9 0.713
2019 99.7 0.727
2020 99.6 0.740
2021 99.4 0.753
2022 99.3 0.766
2023 99.2 0.779
2024 99.1 0.791
2025 98.9 0.804
2026 98.8 0.816
2027 98.7 0.829
2028 98.6 0.841
2029 98.5 0.853
2030 98.4 0.865


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



 
 


wds19553-0644a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic