10193-1232 RST 3688 (HD 89455)

10h 19m 16.88s -12° 31' 41.2" P.A. 143.00 sep 0.5 mag 6.21,8.54 Sp A9V dist. 65.66 pc (214.18 l.y.)

Coord 2000 10193-1232 Discov num RST3688 Comp Coord arcsec 2000 10 19 16.88 -12 31 41.2
Date first 1937 Date last 2019 Obs 17
Pa first 306 Pa last 142.8 P.A. Now (θ) 142.8°
Sep first 0.8 Sep last 0.462 Sep. Now (ρ) 0.462"
Mag pri 6.21 Mag sec 8.54 delta mag (ΔM) 2.33 Spectral class A9V (white)
Pri motion ra -013 Sec motion ra
Pri motion dec -020 Sec motion dec
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 89455 Constellation Hydra SAO 155894 HIP 50536
Tycho2 5496-01789-1 Gaia DR2 3753670544756354688 HD 89455 HR 4055
GC 14166 BD BD-11 2851 Distance 65.66 Distance ly 214.18




ORBITAL ELEMENTS

Period (P)180y Periastron (T)2005.08y Semi-major axis (a)0.6852a
Eccentricity (e)0.544 Inclination (i)80.9° Longitude of periastron (ω)278.5°
Node (Ω)142.1° Notes ReferenceTok2020e
Equinox Last observation2019 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 337.2 0.177
2001 342.3 0.139
2002 351.2 0.101
2003 10.0 0.067
2004 50.9 0.050
2005 93.2 0.065
2006 113.1 0.098
2007 122.4 0.136
2008 127.7 0.174
2009 131.1 0.211
2010 133.5 0.246
2011 135.3 0.279
2012 136.7 0.310
2013 137.9 0.338
2014 138.9 0.364
2015 139.8 0.387
2016 140.6 0.408
2017 141.3 0.427
2018 142.0 0.443
2019 142.6 0.458
2020 143.2 0.471
2021 143.7 0.482
2022 144.2 0.492
2023 144.7 0.500
2024 145.2 0.507
2025 145.7 0.513
2026 146.2 0.517
2027 146.6 0.521
2028 147.1 0.523
2029 147.6 0.525
2030 148.0 0.525


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



 
 


wds10193-1232a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic