19520-1021 BU 148 AB (HD 187774)

 
 
19h 52m 01.89s -10 21' 13.5" P.A. 219.00 sep 0.6 mag 7.74,8.41 Sp F2 dist. 86.96 pc (283.66 l.y.)
 
 
Coord 2000 19520-1021 Discov num BU  148 Comp AB Coord arcsec 2000 19 52 01.89 -10 21 13.5
Date first 1873 Date last 2021 Obs 74
Pa first 310 Pa last 219.4 P.A. Now (θ) 219.4°
Sep first 1.0 Sep last 0.646 Sep. Now (ρ) 0.646"
Mag pri 7.74 Mag sec 8.41 delta mag (ΔM) 0.67 Spectral class F2 (yellow-white)
Pri motion ra -014 Sec motion ra -014
Pri motion dec -049 Sec motion dec -049
Notes O (Orbital solution)
This double is physical.
 
 
19520-1021 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 187774 163059 19 52 02 -10 21 14 BU 148 AB 2021 74 219 0.6 7.74 8.41 0.67 Y <===
Show 163059 19 52 02 -10 21 14 BU 148 AC 2014 10 55 31.1 7.74 13.30 5.56
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 187774 Constellation Aquila SAO 163059 HIP 97766
Tycho2 5729-01628-1 Gaia DR2 4190490812075716224 HD 187774 ADS 13028
BD BD-10 5203 Distance 86.96 Distance ly 283.66
 
 
ORBITAL ELEMENTS
 
 
Period (P)783.31y Periastron (T)2032.84y Semi-major axis (a)1.365a
Eccentricity (e)0.62 Inclination (i)120.5° Longitude of periastron (ω)217.5°
Node (Ω)38.1° Notes ReferenceLin2004b
Equinox2000 Last observation2002 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 234.5 0.613
2001 233.6 0.612
2002 232.7 0.611
2003 231.8 0.609
2004 230.9 0.607
2005 229.9 0.605
2006 229.0 0.603
2007 228.1 0.601
2008 227.1 0.598
2009 226.1 0.596
2010 225.2 0.593
2011 224.2 0.589
2012 223.2 0.586
2013 222.2 0.582
2014 221.2 0.577
2015 220.2 0.573
2016 219.1 0.568
2017 218.1 0.563
2018 217.0 0.558
2019 215.9 0.552
2020 214.7 0.546
2021 213.6 0.539
2022 212.4 0.533
2023 211.2 0.526
2024 209.9 0.518
2025 208.6 0.511
2026 207.3 0.503
2027 205.9 0.494
2028 204.5 0.486
2029 203.0 0.477
2030 201.5 0.468


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



 
 


wds19520-1021a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic