11250-3200 CHR 242 Aa,Ab

 
 
11h 24m 58.83s -31° 59' 57.5" P.A. 72.00 sep 0.1 mag 8.00,8.90 Sp G5V dist. 47.35 pc (154.46 l.y.)
 
 
Coord 2000 11250-3200 Discov num CHR 242 Comp Aa,Ab Coord arcsec 2000 11 24 58.83 -31 59 57.5
Date first 1996 Date last 2021 Obs 12
Pa first 340 Pa last 71.9 P.A. Now (θ) 345.9°
Sep first 0.1 Sep last 0.096 Sep. Now (ρ) 0.058"
Mag pri 8.00 Mag sec 8.90 delta mag (ΔM) 0.9 Spectral class G5V (yellow)
Pri motion ra -060 Sec motion ra
Pri motion dec +013 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
11250-3200 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 202425 11 24 59 -31 59 58 CHR 242 Aa,Ab 2021 12 72 0.1 8.00 8.90 0.90 Y <===
Show HD 99240 202425 11 24 59 -31 59 58 UC 2133 AB 2017 10 192 57.1 8.93 9.92 0.99
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Hydra SAO 202425 HIP 55714 Tycho2 7219-00022-1
Gaia DR2 3481380127975181696 HD 99240 CD CD-31 8979 CP CP-31 3271
Distance 47.35 Distance ly 154.46
 
 
ORBITAL ELEMENTS
 
 
Period (P)13.47y± 0.13 Periastron (T)2010.74y± 0.14 Semi-major axis (a)0.137a± 0.002
Eccentricity (e)0.563± 0.02 Inclination (i)115.7°± 1 Longitude of periastron (ω)211°± 4.7
Node (Ω)123.7°± 1.7 Notesn ReferenceTok2019c
Equinox Last observation2018 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 129.7 0.152
2001 123.4 0.182
2002 118.4 0.197
2003 113.9 0.198
2004 109.1 0.190
2005 103.6 0.172
2006 96.5 0.145
2007 85.5 0.112
2008 64.4 0.076
2009 17.4 0.054
2010 323.3 0.065
2011 266.6 0.039
2012 152.3 0.072
2013 133.9 0.132
2014 126.1 0.170
2015 120.7 0.191
2016 116.0 0.199
2017 111.4 0.195
2018 106.4 0.181
2019 100.1 0.159
2020 91.4 0.128
2021 76.4 0.093
2022 43.6 0.061
2023 345.9 0.058
2024 300.6 0.061
2025 182.6 0.040
2026 139.9 0.106
2027 129.3 0.155
2028 123.1 0.183
2029 118.1 0.197
2030 113.6 0.198


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



 
 


wds11250-3200a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic