20198+4522 STT 406 (HD 193701)

 
 
20h 19m 49.69s +45 21' 49.7" P.A. 100.00 sep 0.3 mag 7.25,8.74 Sp F5IV dist. 92.51 pc (301.77 l.y.)
 
 
Coord 2000 20198+4522 Discov num STT 406 Comp Coord arcsec 2000 20 19 49.69 +45 21 49.7
Date first 1845 Date last 2011 Obs 161
Pa first 133 Pa last 99.6 P.A. Now (θ) 70.2°
Sep first 0.6 Sep last 0.318 Sep. Now (ρ) 0.13"
Mag pri 7.25 Mag sec 8.74 delta mag (ΔM) 1.49 Spectral class F5IV (yellow-white)
Pri motion ra +018 Sec motion ra +018
Pri motion dec -029 Sec motion dec -029
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 193701 Constellation Cygnus SAO 49481 HIP 100241
Tycho2 3572-00337-1 Gaia DR2 2081494847057615104 HD 193701 GC 28294
ADS 13723 BD BD+44 3429 Distance 92.51 Distance ly 301.77
 
 
ORBITAL ELEMENTS
 
 
Period (P)112.16y± 0.76 Periastron (T)1915.57y± 0.47 Semi-major axis (a)0.3a± 0.019
Eccentricity (e)0.855± 0.019 Inclination (i)141.2°± 6.4 Longitude of periastron (ω)184.4°± 8.6
Node (Ω)124°± 6.9 Notesn ReferenceSca2021b
Equinox Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 108.1 0.446
2001 107.6 0.438
2002 106.9 0.430
2003 106.3 0.421
2004 105.6 0.411
2005 104.9 0.402
2006 104.2 0.392
2007 103.4 0.381
2008 102.6 0.370
2009 101.7 0.359
2010 100.7 0.347
2011 99.7 0.334
2012 98.6 0.321
2013 97.5 0.308
2014 96.2 0.293
2015 94.7 0.279
2016 93.1 0.263
2017 91.3 0.247
2018 89.3 0.230
2019 86.9 0.212
2020 84.0 0.193
2021 80.5 0.173
2022 76.1 0.152
2023 70.2 0.130
2024 61.9 0.107
2025 48.8 0.083
2026 25.7 0.061
2027 343.3 0.047
2028 283.7 0.043
2029 228.1 0.052
2030 197.0 0.074


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



 
 


wds20198%2B4522b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic