00090-5400 HDO 181 (HD 469)

 
 
00h 09m 02.35s -54 00' 07.1" P.A. 15.00 sep 0.4 mag 6.74,8.07 Sp G4IV dist. 128.37 pc (418.74 l.y.)
 
 
Coord 2000 00090-5400 Discov num HDO 181 Comp Coord arcsec 2000 00 09 02.35 -54 00 07.1
Date first 1897 Date last 2018 Obs 47
Pa first 300 Pa last 15.4 P.A. Now (θ) 8.5°
Sep first 1.2 Sep last 0.382 Sep. Now (ρ) 0.4"
Mag pri 6.74 Mag sec 8.07 delta mag (ΔM) 1.33 Spectral class G4IV (yellow)
Pri motion ra +047 Sec motion ra
Pri motion dec +017 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 469 Constellation Phoenix SAO 231943 HIP 730
Tycho2 8464-00766-1 Gaia DR2 4923991064959730816 HD 469 HR 23
GC 148 CP CP-54 19 Distance 128.37 Distance ly 418.74
 
 
ORBITAL ELEMENTS
 
 
Period (P)201.9y Periastron (T)1981.29y Semi-major axis (a)0.4a
Eccentricity (e)0.38 Inclination (i)158.6° Longitude of periastron (ω)13.2°
Node (Ω)141.5° Notesn ReferenceAlz2020b
Equinox2000 Last observation2018 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 59.1 0.282
2001 56.1 0.286
2002 53.1 0.291
2003 50.2 0.295
2004 47.5 0.300
2005 44.8 0.305
2006 42.2 0.310
2007 39.7 0.315
2008 37.2 0.320
2009 34.9 0.325
2010 32.6 0.331
2011 30.4 0.336
2012 28.2 0.341
2013 26.2 0.347
2014 24.2 0.352
2015 22.2 0.358
2016 20.3 0.363
2017 18.5 0.368
2018 16.7 0.374
2019 15.0 0.379
2020 13.3 0.384
2021 11.6 0.390
2022 10.0 0.395
2023 8.5 0.400
2024 7.0 0.405
2025 5.5 0.410
2026 4.0 0.415
2027 2.6 0.420
2028 1.2 0.425
2029 359.9 0.429
2030 358.6 0.434


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



 
 


wds00090-5400d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic