20210+1028 J   838

 
 
20h 21m 00.67s +10 28' 21.0" P.A. 119.5 sep 6.19 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
231
Pa last
119
P.A. Now (θ)
119.5°
Sep first
2.9
Sep last
6.9
Sep. Now (ρ)
6.19"
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 O (See Notes, Orbital solution)
rPM=1.279
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
118.5
Precise sep
6.882
Constellation
Delphinus
Gaia DR2
20839173888
HD
357347
ADS
13734
last precise pa
118.5
last precise sep
6.882
 
 
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° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1995
label rho theta
2000 5.925 113.9
2001 5.961 114.2
2002 5.995 114.5
2003 6.025 114.8
2004 6.052 115.1
2005 6.077 115.4
2006 6.099 115.7
2007 6.118 116.0
2008 6.135 116.3
2009 6.150 116.6
2010 6.163 116.9
2011 6.173 117.2
2012 6.181 117.5
2013 6.188 117.8
2014 6.192 118.1
2015 6.195 118.4
2016 6.195 118.7
2017 6.195 119.0
2018 6.192 119.3
2019 6.188 119.5
2020 6.182 119.8
2021 6.175 120.1
2022 6.167 120.4
2023 6.157 120.7
2024 6.145 121.0
2025 6.133 121.3
2026 6.119 121.6
2027 6.104 121.9
2028 6.088 122.2
2029 6.070 122.5
2030 6.052 122.8

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






wds20210%2B1028a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20210+1028 J 838 2005 17 118 6.3 11.52 12.00 OD 202100.67+102821.0
20210+1028 J 838 2009 19 117 6.3 11.52 12.00 OD 202100.67+102821.0
20210+1028 J 838 2010 20 118 6.4 11.52 12.00 OD 202100.67+102821.0
20210+1028 J 838 2011 22 118 6.5 11.52 12.00 NOD 202100.67+102821.0
20210+1028 J 838 2013 23 118 6.6 12.50 12.60 NO 202100.67+102821.0
20210+1028 J 838 2015 24 119 6.7 12.50 12.60 NO 202100.67+102821.0
20210+1028 J 838 2016 27 119 6.8 12.50 12.60 NO 202100.67+102821.0
20210+1028 J 838 2018 32 119 6.9 12.50 12.60 NO 202100.67+102821.0

If you need more information about this double, apply for a data request form to the WDS.