09001-1228 HU 225 AB (HD 77126)

 
 
09h 00m 05.14s -12° 27' 39.4" P.A. 268.00 sep 0.4 mag 9.18,8.60 Sp F7V dist. 101.01 pc (329.49 l.y.)
 
 
Coord 2000 09001-1228 Discov num HU  225 Comp AB Coord arcsec 2000 09 00 05.14 -12 27 39.4
Date first 1900 Date last 2018 Obs 52
Pa first 280 Pa last 267.7 P.A. Now (θ) 273.8°
Sep first 0.3 Sep last 0.425 Sep. Now (ρ) 0.397"
Mag pri 9.18 Mag sec 8.60 delta mag (ΔM) 0.58 Spectral class F7V (yellow-white)
Pri motion ra -063 Sec motion ra -063
Pri motion dec +002 Sec motion dec +002
Notes N O W (See Notes, Orbital solution, )
This double is physical.
 
 
09001-1228 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 77126 154820 09 00 05 -12 27 39 HU 225 AB 2018 52 268 0.4 9.18 8.60 0.58 Y <===
Show 154820 09 00 05 -12 27 39 WOR 36 AB,C 1976 2 135 5.2 8.16 14.00 5.84
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 77126 Constellation Hydra SAO 154820 HIP 44190
Tycho2 5452-02085-1 Gaia DR2 5735868629841501824 HD 77126 ADS 7131
BD BD-11 2520 Distance 101.01 Distance ly 329.49
 
 
ORBITAL ELEMENTS
 
 
Period (P)125.94y Periastron (T)1944.21y Semi-major axis (a)0.341a
Eccentricity (e)0.331 Inclination (i)46° Longitude of periastron (ω)9.5°
Node (Ω)68.4° Notesn ReferenceDoc2015f
Equinox2000 Last observation2011 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 247.4 0.450
2001 248.4 0.451
2002 249.5 0.452
2003 250.6 0.452
2004 251.6 0.452
2005 252.7 0.452
2006 253.8 0.452
2007 254.8 0.451
2008 255.9 0.450
2009 257.0 0.448
2010 258.1 0.447
2011 259.2 0.444
2012 260.3 0.442
2013 261.4 0.439
2014 262.5 0.436
2015 263.7 0.433
2016 264.9 0.430
2017 266.1 0.426
2018 267.3 0.422
2019 268.5 0.417
2020 269.8 0.412
2021 271.1 0.407
2022 272.4 0.402
2023 273.8 0.397
2024 275.2 0.391
2025 276.6 0.385
2026 278.1 0.379
2027 279.7 0.372
2028 281.3 0.366
2029 282.9 0.359
2030 284.6 0.352


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



 
 


wds09001-1228a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic