23100-4252 DON 1042 (HD 218630)

 
 
23h 09m 57.37s -42° 51' 40.1" P.A. 145.00 sep 0.8 mag 6.00,9.05 Sp F5V dist. 33.41 pc (108.98 l.y.)
 
 
Coord 2000 23100-4252 Discov num DON1042 Comp Coord arcsec 2000 23 09 57.37 -42 51 40.1
Date first 1930 Date last 2021 Obs 27
Pa first 164 Pa last 145.4 P.A. Now (θ) 148.4°
Sep first 0.8 Sep last 0.804 Sep. Now (ρ) 0.831"
Mag pri 6.00 Mag sec 9.05 delta mag (ΔM) 3.05 Spectral class F5V (yellow-white)
Pri motion ra -316 Sec motion ra
Pri motion dec -029 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 218630 Constellation Grus SAO 231464 HIP 114382
Tycho2 8012-01108-1 HD 218630 HR 8814 GC 32260
CD CD-4315281 CP CP-43 9709 Distance 33.41 Distance ly 108.98
 
 
ORBITAL ELEMENTS
 
 
Period (P)98.27y Periastron (T)1994.91y Semi-major axis (a)0.804a
Eccentricity (e)0.553 Inclination (i)39.7° Longitude of periastron (ω)124°
Node (Ω)232.4° Notes ReferenceZir2014a
Equinox2000 Last observation2013 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 60.0 0.452
2001 67.0 0.477
2002 73.4 0.499
2003 79.2 0.519
2004 84.7 0.538
2005 89.7 0.556
2006 94.5 0.573
2007 99.0 0.589
2008 103.3 0.605
2009 107.3 0.621
2010 111.1 0.636
2011 114.8 0.652
2012 118.3 0.667
2013 121.6 0.682
2014 124.8 0.697
2015 127.9 0.712
2016 130.8 0.727
2017 133.6 0.742
2018 136.3 0.757
2019 138.9 0.772
2020 141.4 0.787
2021 143.8 0.802
2022 146.1 0.816
2023 148.4 0.831
2024 150.6 0.845
2025 152.6 0.859
2026 154.7 0.872
2027 156.6 0.886
2028 158.5 0.899
2029 160.4 0.912
2030 162.2 0.925


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



 
 


wds23100-4252b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic