23104+4901 STF 2987 (HD 218790)

 
 
23h 10m 21.28s +49° 01' 06.0" P.A. 149.00 sep 4.2 mag 7.42,10.41 Sp G1V dist. 45.39 pc (148.06 l.y.)
 
 
Coord 2000 23104+4901 Discov num STF2987 Comp Coord arcsec 2000 23 10 21.28 +49 01 06.0
Date first 1828 Date last 2022 Obs 47
Pa first 172 Pa last 149 P.A. Now (θ) 149°
Sep first 2.8 Sep last 4.16 Sep. Now (ρ) 4.16"
Mag pri 7.42 Mag sec 10.41 delta mag (ΔM) 2.99 Spectral class G1V (yellow)
Pri motion ra +232 Sec motion ra +237
Pri motion dec +056 Sec motion dec +052
Notes N O V (See Notes, Orbital solution, Proper motion indicates physical)
rPM=0.026 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 218790 Constellation Andromeda SAO 52759 HIP 114420
Tycho2 3631-01135-1 Gaia DR2 1990678072815187840 HD 218790 GC 32283
ADS 16562 BD BD+48 3952 Distance 45.39 Distance ly 148.06
 
 
ORBITAL ELEMENTS
 
 
Period (P)2176.7924y± 963.9942 Periastron (T)1740.757y± 265.6893 Semi-major axis (a)8.12352a± 4.13838
Eccentricity (e)0.85736± 0.11548 Inclination (i)105.825°± 7.753 Longitude of periastron (ω)94.316°± 12.222
Node (Ω)0.967°± 39.346 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 151.4 4.164
2001 151.3 4.166
2002 151.2 4.167
2003 151.1 4.168
2004 151.0 4.169
2005 150.9 4.170
2006 150.9 4.171
2007 150.8 4.172
2008 150.7 4.174
2009 150.6 4.175
2010 150.5 4.176
2011 150.4 4.177
2012 150.3 4.178
2013 150.2 4.178
2014 150.2 4.179
2015 150.1 4.180
2016 150.0 4.181
2017 149.9 4.182
2018 149.8 4.183
2019 149.7 4.184
2020 149.6 4.185
2021 149.5 4.185
2022 149.5 4.186
2023 149.4 4.187
2024 149.3 4.188
2025 149.2 4.188
2026 149.1 4.189
2027 149.0 4.190
2028 148.9 4.191
2029 148.8 4.191
2030 148.8 4.192


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



 
 


wds23104%2B4901a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic