21214+1020 A 617 (HD 203345)

 
 
21h 21m 21.56s +10° 19' 56.6" P.A. 45.00 sep 0.0 mag 7.50,7.50 Sp F7V dist. 47.89 pc (156.22 l.y.)
 
 
Coord 2000 21214+1020 Discov num A   617 Comp Coord arcsec 2000 21 21 21.56 +10 19 56.6
Date first 1903 Date last 2021 Obs 152
Pa first 273 Pa last 44.6 P.A. Now (θ) 108.7°
Sep first 0.2 Sep last 0.045 Sep. Now (ρ) 0.118"
Mag pri 7.50 Mag sec 7.50 delta mag (ΔM) 0 Spectral class F7V (yellow-white)
Pri motion ra +045 Sec motion ra
Pri motion dec -043 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 203345 Constellation Equuleus SAO 107061 HIP 105431
Tycho2 1110-01491-1 Gaia DR2 1745244296985069184 HD 203345 GC 29887
ADS 14893 BD BD+09 4786 Distance 47.89 Distance ly 156.22
 
 
ORBITAL ELEMENTS
 
 
Period (P)6.03y Periastron (T)1991.9y Semi-major axis (a)0.097a
Eccentricity (e)0.86 Inclination (i)135° Longitude of periastron (ω)23°
Node (Ω)288° Notesn ReferenceSod1999
Equinox2000 Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 97.8 0.166
2001 90.9 0.173
2002 83.5 0.153
2003 71.0 0.102
2004 216.4 0.012
2005 107.5 0.124
2006 98.0 0.165
2007 91.1 0.173
2008 83.7 0.154
2009 71.6 0.104
2010 258.8 0.012
2011 107.9 0.122
2012 98.2 0.165
2013 91.3 0.173
2014 84.0 0.155
2015 72.1 0.106
2016 292.8 0.014
2017 108.3 0.120
2018 98.5 0.164
2019 91.5 0.174
2020 84.2 0.156
2021 72.7 0.108
2022 318.8 0.016
2023 108.7 0.118
2024 98.7 0.163
2025 91.7 0.174
2026 84.5 0.157
2027 73.2 0.110
2028 339.6 0.018
2029 109.2 0.116
2030 98.9 0.162
2031 91.9 0.174
2032 84.7 0.158
2033 73.7 0.112
2034 355.8 0.021
2035 109.6 0.113
2036 99.1 0.161
2037 92.1 0.174
2038 85.0 0.159
2039 74.2 0.114
2040 8.3 0.024
2041 110.1 0.111
2042 99.4 0.161
2043 92.3 0.174
2044 85.2 0.159
2045 74.6 0.115
2046 17.9 0.027
2047 110.6 0.109
2048 99.6 0.160
2049 92.5 0.174
2050 85.5 0.160


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



 
 


wds21214%2B1020a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic