21434+2353 HU 374 (HD 206719)

 
 
21h 43m 25.99s +23° 53' 05.4" P.A. 121.00 sep 0.2 mag 9.40,9.40 Sp F5 dist. 7142.86 pc (23300.01 l.y.)
 
 
Coord 2000 21434+2353 Discov num HU  374 Comp Coord arcsec 2000 21 43 25.99 +23 53 05.4
Date first 1901 Date last 2012 Obs 20
Pa first 39 Pa last 121.1 P.A. Now (θ) 121.1°
Sep first 0.3 Sep last 0.172 Sep. Now (ρ) 0.172"
Mag pri 9.40 Mag sec 9.40 delta mag (ΔM) 0 Spectral class F5 (yellow-white)
Pri motion ra -016 Sec motion ra
Pri motion dec +005 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 206719 Constellation Pegasus SAO 89926 HIP 107254
Tycho2 2189-01566-1 Gaia DR2 1794621989799247360 HD 206719 BD BD+23 4379
Distance 7142.86 Distance ly 23300.01
 
 
ORBITAL ELEMENTS
 
 
Period (P)130y Periastron (T)1983.1y Semi-major axis (a)0.229a
Eccentricity (e)0.569 Inclination (i)120.5° Longitude of periastron (ω)177.5°
Node (Ω)26.9° Notes ReferenceUSN2002
Equinox2000 Last observation1987 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 77.8 0.123
2001 74.1 0.132
2002 70.8 0.141
2003 67.9 0.149
2004 65.4 0.158
2005 63.1 0.167
2006 61.0 0.175
2007 59.1 0.184
2008 57.4 0.192
2009 55.8 0.200
2010 54.4 0.208
2011 53.0 0.216
2012 51.8 0.224
2013 50.6 0.231
2014 49.5 0.238
2015 48.5 0.245
2016 47.5 0.252
2017 46.6 0.258
2018 45.7 0.265
2019 44.8 0.271
2020 44.0 0.276
2021 43.2 0.282
2022 42.5 0.288
2023 41.8 0.293
2024 41.1 0.298
2025 40.4 0.303
2026 39.7 0.307
2027 39.1 0.312
2028 38.5 0.316
2029 37.9 0.320
2030 37.3 0.324


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



 
 


wds21434%2B2353a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic