21370+8255 STF 2837 (HD 207146)

 
 
21h 36m 58.67s +82° 55' 16.5" P.A. 269.00 sep 3.2 mag 8.84,9.36 Sp G5
 
 
Coord 2000 21370+8255 Discov num STF2837 Comp Coord arcsec 2000 21 36 58.67 +82 55 16.5
Date first 1832 Date last 2018 Obs 88
Pa first 321 Pa last 268.8 P.A. Now (θ) 268.8°
Sep first 2.2 Sep last 3.202 Sep. Now (ρ) 3.202"
Mag pri 8.84 Mag sec 9.36 delta mag (ΔM) 0.52 Spectral class G5 (yellow)
Pri motion ra +007 Sec motion ra
Pri motion dec -051 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 207146 Constellation Cepheus SAO 3606 Tycho2 4649-00057-1
Gaia DR2 2300220420283692672 HD 207146 GC 30375 ADS 15229
 
 
ORBITAL ELEMENTS
 
 
Period (P)1153.3017y± 590.6734 Periastron (T)1794.7941y± 82.5643 Semi-major axis (a)4.69589a± 1.90688
Eccentricity (e)0.846± 0.20093 Inclination (i)116.269°± 15.188 Longitude of periastron (ω)95.766°± 15.376
Node (Ω)146.809°± 64.776 Notes ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 271.8 3.115
2001 271.7 3.118
2002 271.5 3.122
2003 271.3 3.125
2004 271.2 3.129
2005 271.0 3.132
2006 270.8 3.136
2007 270.7 3.139
2008 270.5 3.142
2009 270.3 3.146
2010 270.2 3.149
2011 270.0 3.152
2012 269.8 3.156
2013 269.7 3.159
2014 269.5 3.162
2015 269.4 3.166
2016 269.2 3.169
2017 269.0 3.172
2018 268.9 3.175
2019 268.7 3.179
2020 268.5 3.182
2021 268.4 3.185
2022 268.2 3.188
2023 268.1 3.191
2024 267.9 3.195
2025 267.8 3.198
2026 267.6 3.201
2027 267.4 3.204
2028 267.3 3.207
2029 267.1 3.210
2030 267.0 3.213


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



 
 


wds21370%2B8255b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic