01262-6751 DON 17 (HD 8944)

 
 
01h 26m 09.45s -67 50' 33.0" P.A. 291.00 sep 1.4 mag 8.81,9.81 Sp K0IV dist. 63.09 pc (205.8 l.y.)
 
 
Coord 2000 01262-6751 Discov num DON  17 Comp Coord arcsec 2000 01 26 09.45 -67 50 33.0
Date first 1928 Date last 2021 Obs 46
Pa first 357 Pa last 291.4 P.A. Now (θ) 291.4°
Sep first 0.7 Sep last 1.431 Sep. Now (ρ) 1.431"
Mag pri 8.81 Mag sec 9.81 delta mag (ΔM) 1 Spectral class K0IV (yellow-orange)
Pri motion ra +117 Sec motion ra +117
Pri motion dec -062 Sec motion dec -062
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 8944 Constellation Hydrus SAO 248383 HIP 6703
Tycho2 9136-00265-1 Gaia DR2 4692424016248469120 HD 8944 CD CD-68 58
CP CP-68 57 Distance 63.09 Distance ly 205.8
 
 
ORBITAL ELEMENTS
 
 
Period (P)374.1934y± 133.5931 Periastron (T)1948.7445y± 1.8322 Semi-major axis (a)1.15202a± 0.14288
Eccentricity (e)0.8491± 0.04483 Inclination (i)47.47°± 10.538 Longitude of periastron (ω)347.654°± 9.806
Node (Ω)134.941°± 6.087 Notes ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 285.0 1.125
2001 285.3 1.140
2002 285.7 1.156
2003 286.0 1.171
2004 286.3 1.186
2005 286.7 1.201
2006 287.0 1.215
2007 287.3 1.230
2008 287.6 1.244
2009 287.9 1.258
2010 288.2 1.272
2011 288.4 1.286
2012 288.7 1.300
2013 289.0 1.313
2014 289.2 1.327
2015 289.5 1.340
2016 289.7 1.353
2017 290.0 1.366
2018 290.2 1.379
2019 290.5 1.392
2020 290.7 1.404
2021 290.9 1.416
2022 291.2 1.429
2023 291.4 1.441
2024 291.6 1.453
2025 291.8 1.464
2026 292.0 1.476
2027 292.2 1.488
2028 292.4 1.499
2029 292.6 1.510
2030 292.8 1.521


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



 
 


wds01262-6751b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic