19487+1504 A 1658 (HD 187283)

19h 48m 39.64s +15° 03' 32.4" P.A. 54.00 sep 0.2 mag 8.30,8.74 Sp F5V dist. 136.61 pc (445.62 l.y.)

Coord 2000 19487+1504 Discov num A  1658 Comp Coord arcsec 2000 19 48 39.64 +15 03 32.4
Date first 1907 Date last 2021 Obs 84
Pa first 161 Pa last 54.1 P.A. Now (θ) 47.7°
Sep first 0.2 Sep last 0.233 Sep. Now (ρ) 0.237"
Mag pri 8.30 Mag sec 8.74 delta mag (ΔM) 0.44 Spectral class F5V (yellow-white)
Pri motion ra +044 Sec motion ra
Pri motion dec +012 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 187283 Constellation Aquila SAO 105284 HIP 97469
Tycho2 1615-00730-1 Gaia DR2 4317733994259738752 HD 187283 ADS 12961
BD BD+14 4048 Distance 136.61 Distance ly 445.62




ORBITAL ELEMENTS

Period (P)88.1y± 1.3 Periastron (T)1991.6y± 1.2 Semi-major axis (a)0.224a± 0.001
Eccentricity (e)0.087± 0.004 Inclination (i)169.8°± 5 Longitude of periastron (ω)228.2°± 35
Node (Ω)51.5°± 40 Notesn ReferenceDoc2009g
Equinox2000 Last observation2000 Grade2(1=Definitive, 9=Indet.)

label theta rho
2000 142.8 0.205
2001 138.1 0.206
2002 133.4 0.207
2003 128.7 0.208
2004 124.1 0.210
2005 119.6 0.211
2006 115.1 0.213
2007 110.7 0.214
2008 106.3 0.216
2009 102.0 0.217
2010 97.8 0.219
2011 93.6 0.220
2012 89.5 0.222
2013 85.5 0.224
2014 81.5 0.225
2015 77.5 0.227
2016 73.7 0.228
2017 69.8 0.230
2018 66.1 0.231
2019 62.3 0.233
2020 58.6 0.234
2021 55.0 0.235
2022 51.3 0.236
2023 47.7 0.237
2024 44.2 0.238
2025 40.6 0.239
2026 37.1 0.239
2027 33.6 0.240
2028 30.1 0.241
2029 26.7 0.241
2030 23.2 0.241


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



 
 


wds19487%2B1504b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic