12455-4552 HDS 1789 Aa,Ab (HD 110861)

 
 
12h 45m 27.62s -45° 51' 45.2" P.A. 326.00 sep 0.1 mag 10.07,10.47 Sp G8V dist. 78.43 pc (255.84 l.y.)
 
 
Coord 2000 12455-4552 Discov num HDS1789 Comp Aa,Ab Coord arcsec 2000 12 45 27.62 -45 51 45.2
Date first 1991 Date last 2021 Obs 5
Pa first 52 Pa last 326 P.A. Now (θ) 0
Sep first 0.2 Sep last 0.094 Sep. Now (ρ) 0.107"
Mag pri 10.07 Mag sec 10.47 delta mag (ΔM) 0.4 Spectral class G8V (yellow)
Pri motion ra -051 Sec motion ra
Pri motion dec -061 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
12455-4552 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 110861 223647 12 45 28 -45 51 45 HDS 1789 Aa,Ab 2021 5 326 0.1 10.07 10.47 0.40 Y <===
Show 223647 12 45 28 -45 51 45 DON 554 AB 1948 3 313 1.3 10.07 13.60 3.53
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 110861 Constellation Centaurus SAO 223647 HIP 62252
Tycho2 8245-00584-1 Gaia DR2 6129293062999434240 HD 110861 CD CD-45 7991
CP CP-45 6023 Distance 78.43 Distance ly 255.84
 
 
ORBITAL ELEMENTS
 
 
Period (P)36.34y Periastron (T)2019.77y Semi-major axis (a)0.161a
Eccentricity (e)0.25 Inclination (i)38° Longitude of periastron (ω)239.1°
Node (Ω)63.8° Notes ReferenceTok2020g
Equinox2000 Last observation2020 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 106.2 0.177
2001 112.6 0.173
2002 119.3 0.169
2003 126.3 0.165
2004 133.7 0.160
2005 141.5 0.156
2006 149.7 0.153
2007 158.3 0.150
2008 167.1 0.148
2009 176.2 0.146
2010 185.4 0.146
2011 194.7 0.145
2012 204.0 0.145
2013 213.4 0.144
2014 222.9 0.142
2015 232.8 0.139
2016 243.3 0.134
2017 254.8 0.127
2018 267.8 0.118
2019 283.0 0.109
2020 300.9 0.101
2021 321.1 0.097
2022 341.5 0.099
2023 0.107
2024 15.5 0.118
2025 28.2 0.131
2026 38.6 0.143
2027 47.5 0.154
2028 55.2 0.164
2029 62.1 0.172
2030 68.6 0.177


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



 
 


wds12455-4552a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic