20290+0710 A 610 (HD 195090)

 
 
20h 29m 02.58s +07 09' 29.3" P.A. 99.00 sep 0.6 mag 9.52,9.91 Sp G4.4V+G2V dist. 78.12 pc (254.83 l.y.)
 
 
Coord 2000 20290+0710 Discov num A   610 Comp Coord arcsec 2000 20 29 02.58 +07 09 29.3
Date first 1901 Date last 2021 Obs 88
Pa first 189 Pa last 99 P.A. Now (θ) 101.7°
Sep first 0.5 Sep last 0.555 Sep. Now (ρ) 0.463"
Mag pri 9.52 Mag sec 9.91 delta mag (ΔM) 0.39 Spectral class G4.4V+G2V (yellow/yellow)
Pri motion ra -050 Sec motion ra
Pri motion dec -002 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 195090 Constellation Delphinus SAO 125855 HIP 101046
Tycho2 0509-01364-1 HD 195090 ADS 13894 BD BD+06 4543
Distance 78.12 Distance ly 254.83
 
 
ORBITAL ELEMENTS
 
 
Period (P)170.62y Periastron (T)1984.25y Semi-major axis (a)0.472a
Eccentricity (e)0.232 Inclination (i)30.3° Longitude of periastron (ω)285.2°
Node (Ω)72° Notesn ReferenceCot2002
Equinox Last observation2000 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 52.1 0.383
2001 54.7 0.388
2002 57.3 0.393
2003 59.8 0.398
2004 62.3 0.403
2005 64.7 0.407
2006 67.1 0.412
2007 69.4 0.416
2008 71.6 0.420
2009 73.8 0.424
2010 76.0 0.428
2011 78.1 0.432
2012 80.2 0.435
2013 82.3 0.438
2014 84.4 0.441
2015 86.4 0.444
2016 88.4 0.447
2017 90.3 0.450
2018 92.3 0.452
2019 94.2 0.455
2020 96.1 0.457
2021 98.0 0.459
2022 99.8 0.461
2023 101.7 0.463
2024 103.5 0.464
2025 105.3 0.466
2026 107.2 0.467
2027 109.0 0.469
2028 110.8 0.470
2029 112.5 0.471
2030 114.3 0.473


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



 
 


wds20290%2B0710a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic