09279+3128 HO 366 AB

09h 27m 54.30s +31° 27' 54.1" P.A. 213.00 sep 0.2 mag 9.40,9.80 Sp G0

Coord 2000 09279+3128 Discov num HO  366 Comp AB Coord arcsec 2000 09 27 54.30 +31 27 54.1
Date first 1891 Date last 2012 Obs 34
Pa first 10 Pa last 212.9 P.A. Now (θ) 212.9°
Sep first 0.5 Sep last 0.224 Sep. Now (ρ) 0.224"
Mag pri 9.40 Mag sec 9.80 delta mag (ΔM) 0.4 Spectral class G0 (yellow)
Pri motion ra -012 Sec motion ra
Pri motion dec -068 Sec motion dec
Notes O (Orbital solution)




This double is physical.



09279+3128 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 61504 09 27 54 +31 27 54 HO 366 AB 2012 34 213 0.2 9.40 9.80 0.40 Y <===
Show HD 81656 61504 09 27 54 +31 27 54 HO 366 AB,C 2015 9 59 53.3 8.87 12.34 3.47


Triple system
4 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Constellation Leo SAO 61504 Tycho2 2494-00727-1 Gaia DR2 700874070695989888
HD 81656 ADS 7384




ORBITAL ELEMENTS

Period (P)353.11y Periastron (T)2001.3y Semi-major axis (a)0.404a
Eccentricity (e)0.764 Inclination (i)19.4° Longitude of periastron (ω)166.1°
Node (Ω)9.8° Notes ReferenceZir2010
Equinox2000 Last observation1997 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 162.1 0.096
2001 173.3 0.095
2002 184.5 0.096
2003 195.3 0.098
2004 205.6 0.101
2005 215.1 0.105
2006 223.9 0.110
2007 231.8 0.116
2008 238.9 0.122
2009 245.3 0.129
2010 251.0 0.136
2011 256.2 0.144
2012 260.9 0.151
2013 265.1 0.159
2014 268.9 0.167
2015 272.3 0.175
2016 275.5 0.183
2017 278.4 0.190
2018 281.1 0.198
2019 283.6 0.206
2020 285.9 0.214
2021 288.0 0.221
2022 290.0 0.229
2023 291.9 0.236
2024 293.7 0.244
2025 295.3 0.251
2026 296.9 0.258
2027 298.4 0.265
2028 299.8 0.272
2029 301.1 0.279
2030 302.4 0.286


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



 
 


wds09279%2B3128a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic