11268-5310 I 883 (HD 99574)

 
 
11h 26m 47.30s -53° 09' 35.8" P.A. 240.00 sep 0.3 mag 6.83,6.52 Sp K0III+... dist. 187.62 pc (612.02 l.y.)
 
 
Coord 2000 11268-5310 Discov num I   883 Comp Coord arcsec 2000 11 26 47.30 -53 09 35.8
Date first 1910 Date last 2019 Obs 39
Pa first 270 Pa last 240.4 P.A. Now (θ) 243°
Sep first 0.5 Sep last 0.252 Sep. Now (ρ) 0.271"
Mag pri 6.83 Mag sec 6.52 delta mag (ΔM) 0.31 Spectral class K0III+... (yellow-orange)
Pri motion ra -042 Sec motion ra
Pri motion dec +016 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 99574 Constellation Centaurus SAO 239074 HIP 55849
Tycho2 8617-01056-1 Gaia DR2 5348142793675309056 HD 99574 HR 4417
GC 15710 CP CP-52 4567 Distance 187.62 Distance ly 612.02
 
 
ORBITAL ELEMENTS
 
 
Period (P)154.3y Periastron (T)1976.81y Semi-major axis (a)0.224a
Eccentricity (e)0.64 Inclination (i)35.3° Longitude of periastron (ω)311.7°
Node (Ω)129.8° Notesn ReferenceHrt2010a
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 210.1 0.185
2001 212.2 0.190
2002 214.2 0.194
2003 216.1 0.198
2004 218.0 0.202
2005 219.7 0.207
2006 221.4 0.211
2007 223.0 0.215
2008 224.6 0.219
2009 226.1 0.223
2010 227.6 0.226
2011 229.0 0.230
2012 230.3 0.234
2013 231.6 0.238
2014 232.9 0.241
2015 234.2 0.245
2016 235.4 0.249
2017 236.5 0.252
2018 237.7 0.255
2019 238.8 0.259
2020 239.9 0.262
2021 240.9 0.265
2022 242.0 0.268
2023 243.0 0.271
2024 244.0 0.274
2025 244.9 0.277
2026 245.9 0.280
2027 246.8 0.283
2028 247.7 0.286
2029 248.6 0.288
2030 249.5 0.291


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



 
 


wds11268-5310a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic