22504-1744 DON 1038

 
 
22h 50m 21.55s -17° 44' 20.3" P.A. 67.00 sep 0.4 mag 10.70,11.00 Sp K4/5+K4/5
 
 
Coord 2000 22504-1744 Discov num DON1038 Comp Coord arcsec 2000 22 50 21.55 -17 44 20.3
Date first 1932 Date last 2018 Obs 12
Pa first 344 Pa last 66.7 P.A. Now (θ) 252.8°
Sep first 0.5 Sep last 0.374 Sep. Now (ρ) 0.337"
Mag pri 10.70 Mag sec 11.00 delta mag (ΔM) 0.3 Spectral class K4/5+K4/5 (yellow-orange/yellow-orange)
Pri motion ra -077 Sec motion ra
Pri motion dec -031 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Aquarius Tycho2 6390-00152-1
 
 
ORBITAL ELEMENTS
 
 
Period (P)147.13y± 5 Periastron (T)1972.27y± 0.6 Semi-major axis (a)0.488a± 0.02
Eccentricity (e)0.556± 0.004 Inclination (i)64.2°± 3.5 Longitude of periastron (ω)97.6°± 2
Node (Ω)9.9°± 0.5 Notesn ReferenceDoc2016i
Equinox2000 Last observation2015 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 216.3 0.391
2001 217.7 0.390
2002 219.1 0.389
2003 220.5 0.387
2004 221.9 0.385
2005 223.3 0.383
2006 224.8 0.381
2007 226.2 0.378
2008 227.7 0.376
2009 229.2 0.373
2010 230.7 0.371
2011 232.3 0.368
2012 233.9 0.365
2013 235.4 0.362
2014 237.1 0.359
2015 238.7 0.356
2016 240.4 0.354
2017 242.1 0.351
2018 243.8 0.348
2019 245.6 0.346
2020 247.3 0.343
2021 249.1 0.341
2022 251.0 0.339
2023 252.8 0.337
2024 254.7 0.335
2025 256.6 0.333
2026 258.5 0.331
2027 260.4 0.330
2028 262.4 0.329
2029 264.3 0.327
2030 266.3 0.327


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



 
 


wds22504-1744b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic