11286-4508 I 885 AB (HD 99804)

11h 28m 37.32s -45° 08' 27.4" P.A. 146.00 sep 0.6 mag 7.98,9.90 Sp B0:III dist. 64.1 pc (209.09 l.y.)

Coord 2000 11286-4508 Discov num I   885 Comp AB Coord arcsec 2000 11 28 37.32 -45 08 27.4
Date first 1910 Date last 2021 Obs 20
Pa first 190 Pa last 145.7 P.A. Now (θ) 145.7°
Sep first 0.8 Sep last 0.619 Sep. Now (ρ) 0.619"
Mag pri 7.98 Mag sec 9.90 delta mag (ΔM) 1.92 Spectral class B0:III (blue-white)
Pri motion ra -038 Sec motion ra -038
Pri motion dec -021 Sec motion dec -021
Notes O (Orbital solution)




This double is physical.



11286-4508 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 99804 222814 11 28 37 -45 08 27 I 885 AB 2021 20 146 0.6 7.98 9.90 1.92 Y <===
Show 222814 11 28 37 -45 08 27 TOK 280 AC 2015 3 353 195.9 7.87 18.60 10.73


Triple system
3 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Name HD 99804 Constellation Centaurus SAO 222814 HIP 56004
Tycho2 8214-00439-1 Gaia DR2 5375932022338269952 HD 99804 CD CD-44 7343
CP CP-44 5559 Distance 64.1 Distance ly 209.09




ORBITAL ELEMENTS

Period (P)650y Periastron (T)2520y Semi-major axis (a)1.69a
Eccentricity (e)0.589 Inclination (i)100.8° Longitude of periastron (ω)118.5°
Node (Ω)8.4° Notes ReferenceUSN2002
Equinox2000 Last observation1995 Grade5(1=Definitive, 9=Indet.)

label theta rho
2000 152.2 0.597
2001 151.6 0.591
2002 150.9 0.585
2003 150.2 0.579
2004 149.4 0.573
2005 148.7 0.567
2006 148.0 0.561
2007 147.2 0.555
2008 146.4 0.550
2009 145.6 0.544
2010 144.8 0.538
2011 143.9 0.533
2012 143.1 0.528
2013 142.2 0.522
2014 141.3 0.517
2015 140.4 0.512
2016 139.5 0.507
2017 138.6 0.502
2018 137.6 0.497
2019 136.6 0.492
2020 135.6 0.488
2021 134.6 0.483
2022 133.6 0.479
2023 132.5 0.475
2024 131.5 0.471
2025 130.4 0.467
2026 129.3 0.463
2027 128.1 0.460
2028 127.0 0.456
2029 125.8 0.453
2030 124.7 0.450


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



 
 


wds11286-4508a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic