19550+4152 HO 581 (HD 188753)

 
 
19h 54m 58.40s +41 52' 17.6" P.A. 230.00 sep 0.1 mag 8.03,8.72 Sp G9V dist. 46.23 pc (150.8 l.y.)
 
 
Coord 2000 19550+4152 Discov num HO  581 Comp Coord arcsec 2000 19 54 58.40 +41 52 17.6
Date first 1895 Date last 2012 Obs 120
Pa first 258 Pa last 229.7 P.A. Now (θ) 75.7°
Sep first 0.3 Sep last 0.115 Sep. Now (ρ) 0.351"
Mag pri 8.03 Mag sec 8.72 delta mag (ΔM) 0.69 Spectral class G9V (yellow)
Pri motion ra -044 Sec motion ra
Pri motion dec +293 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 188753 Constellation Cygnus SAO 48968 HIP 98001
Tycho2 3145-00504-1 Gaia DR2 2075398256940805248 HD 188753 ADS 13125
BD BD+41 3535 Distance 46.23 Distance ly 150.8
 
 
ORBITAL ELEMENTS
 
 
Period (P)25.63y± 0.04 Periastron (T)1988.1y± 0.1 Semi-major axis (a)258.7m± 2.8
Eccentricity (e)0.502± 0.008 Inclination (i)31.1°± 1.5 Longitude of periastron (ω)233.8°± 1.3
Node (Ω)45.7°± 1.1 Notesn ReferenceXXX2018c
Equinox2000 Last observation2006 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 90.1 0.357
2001 95.7 0.353
2002 101.3 0.346
2003 107.3 0.337
2004 113.7 0.325
2005 120.6 0.311
2006 128.2 0.294
2007 136.7 0.276
2008 146.5 0.257
2009 158.0 0.236
2010 171.8 0.214
2011 188.9 0.190
2012 211.1 0.164
2013 242.5 0.135
2014 289.3 0.114
2015 338.2 0.132
2016 8.8 0.174
2017 27.1 0.218
2018 39.6 0.255
2019 49.1 0.286
2020 56.9 0.310
2021 63.7 0.328
2022 69.9 0.342
2023 75.7 0.351
2024 81.2 0.356
2025 86.7 0.357
2026 92.2 0.356
2027 97.7 0.351
2028 103.5 0.343
2029 109.6 0.332
2030 116.2 0.320


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



 
 


wds19550%2B4152b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic