20210+1028 J 838

 
 
20h 21m 00.67s +10 28' 21.0" P.A. 119.00 sep 6.9 mag 12.50,12.60
 
 
Coord 2000 20210+1028 Discov num J   838 Comp Coord arcsec 2000 20 21 00.67 +10 28 21.0
Date first 1912 Date last 2018 Obs 35
Pa first 51 Pa last 118.5 P.A. Now (θ) 118.5°
Sep first 2.9 Sep last 6.882 Sep. Now (ρ) 6.882"
Mag pri 12.50 Mag sec 12.60 delta mag (ΔM) 0.1 Spectral class
Pri motion ra -018 Sec motion ra +040
Pri motion dec -007 Sec motion dec -026
Notes N C (See Notes, Has orbit and linear solution)
rPM=1.279
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Delphinus Tycho2 1078-00744-1 Gaia DR2 1753567320839173888 HD 357347
ADS 13734
 
 
ORBITAL ELEMENTS
 
 
Period (P)239.84y Periastron (T)1967.51y Semi-major axis (a)7.451a
Eccentricity (e)0.784 Inclination (i)77.6° Longitude of periastron (ω)258.1°
Node (Ω)103° Notesn ReferenceOle2002b
Equinox2000 Last observation1995 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 113.9 5.925
2001 114.2 5.961
2002 114.5 5.995
2003 114.8 6.025
2004 115.1 6.052
2005 115.4 6.077
2006 115.7 6.099
2007 116.0 6.118
2008 116.3 6.135
2009 116.6 6.150
2010 116.9 6.163
2011 117.2 6.173
2012 117.5 6.181
2013 117.8 6.188
2014 118.1 6.192
2015 118.4 6.195
2016 118.7 6.195
2017 119.0 6.195
2018 119.3 6.192
2019 119.5 6.188
2020 119.8 6.182
2021 120.1 6.175
2022 120.4 6.167
2023 120.7 6.157
2024 121.0 6.145
2025 121.3 6.133
2026 121.6 6.119
2027 121.9 6.104
2028 122.2 6.088
2029 122.5 6.070
2030 122.8 6.052


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



 
 


wds20210%2B1028a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic