21597+4907 HU 774 (HD 209103)

 
 
21h 59m 41.89s +49° 07' 23.4" P.A. 195.00 sep 0.2 mag 8.36,8.45 Sp A0 dist. 283.29 pc (924.09 l.y.)
 
 
Coord 2000 21597+4907 Discov num HU  774 Comp Coord arcsec 2000 21 59 41.89 +49 07 23.4
Date first 1904 Date last 2019 Obs 35
Pa first 153 Pa last 195.3 P.A. Now (θ) 208.1°
Sep first 0.2 Sep last 0.17 Sep. Now (ρ) 0.167"
Mag pri 8.36 Mag sec 8.45 delta mag (ΔM) 0.09 Spectral class A0 (white)
Pri motion ra +007 Sec motion ra
Pri motion dec -003 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 209103 Constellation Cygnus SAO 51525 HIP 108577
Tycho2 3613-01239-1 Gaia DR2 1976485233140206976 HD 209103 GC 30781
ADS 15530 BD BD+48 3566 Distance 283.29 Distance ly 924.09
 
 
ORBITAL ELEMENTS
 
 
Period (P)85.56y Periastron (T)2046.06y Semi-major axis (a)0.138a
Eccentricity (e)0.528 Inclination (i)20.8° Longitude of periastron (ω)254.2°
Node (Ω)98.8° Notesn ReferenceDoc2013k
Equinox2000 Last observation2008 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 166.6 0.198
2001 168.3 0.198
2002 169.9 0.198
2003 171.5 0.198
2004 173.1 0.198
2005 174.8 0.198
2006 176.4 0.197
2007 178.0 0.196
2008 179.7 0.196
2009 181.4 0.195
2010 183.0 0.194
2011 184.7 0.192
2012 186.5 0.191
2013 188.2 0.190
2014 190.0 0.188
2015 191.8 0.186
2016 193.7 0.184
2017 195.6 0.182
2018 197.5 0.180
2019 199.5 0.178
2020 201.5 0.175
2021 203.6 0.173
2022 205.8 0.170
2023 208.1 0.167
2024 210.4 0.164
2025 212.8 0.160
2026 215.3 0.157
2027 218.0 0.153
2028 220.8 0.150
2029 223.7 0.146
2030 226.8 0.141


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



 
 


wds21597%2B4907c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic