04188-3407 I 724 (HD 27470)

 
 
04h 18m 47.63s -34° 07' 16.7" P.A. 224.00 sep 0.1 mag 8.30,9.30 Sp G1V dist. 257.07 pc (838.56 l.y.)
 
 
Coord 2000 04188-3407 Discov num I   724 Comp Coord arcsec 2000 04 18 47.63 -34 07 16.7
Date first 1910 Date last 2021 Obs 12
Pa first 200 Pa last 223.5 P.A. Now (θ) 223.5°
Sep first 0.5 Sep last 0.113 Sep. Now (ρ) 0.113"
Mag pri 8.30 Mag sec 9.30 delta mag (ΔM) 1 Spectral class G1V (yellow)
Pri motion ra +021 Sec motion ra
Pri motion dec +021 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 27470 Constellation Eridanus SAO 194919 HIP 20116
Tycho2 7040-01357-1 Gaia DR2 4870503947436774400 HD 27470 GC 5222
CD CD-34 1622 CP CP-34 469 Distance 257.07 Distance ly 838.56
 
 
ORBITAL ELEMENTS
 
 
Period (P)180y Periastron (T)1978.86y Semi-major axis (a)0.408a
Eccentricity (e)0.79 Inclination (i)93.7° Longitude of periastron (ω)121.6°
Node (Ω)203.9° Notes ReferenceTok2021f
Equinox Last observation2021 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 358.6 0.059
2001 354.4 0.053
2002 349.0 0.047
2003 342.2 0.041
2004 333.5 0.037
2005 322.5 0.033
2006 309.3 0.031
2007 294.9 0.030
2008 281.0 0.032
2009 268.9 0.035
2010 259.1 0.039
2011 251.4 0.044
2012 245.4 0.050
2013 240.7 0.056
2014 236.9 0.062
2015 233.9 0.069
2016 231.3 0.076
2017 229.2 0.083
2018 227.5 0.089
2019 225.9 0.096
2020 224.6 0.103
2021 223.4 0.110
2022 222.4 0.117
2023 221.5 0.124
2024 220.7 0.131
2025 220.0 0.138
2026 219.3 0.145
2027 218.7 0.151
2028 218.2 0.158
2029 217.7 0.165
2030 217.2 0.172


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



 
 


wds04188-3407a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic