02552+5950 MLR 520 (HD 17911)

02h 55m 12.64s +59° 49' 45.6" P.A. 62.00 sep 0.1 mag 8.76,8.87 Sp A5V dist. 142.25 pc (464.02 l.y.)

Coord 2000 02552+5950 Discov num MLR 520 Comp Coord arcsec 2000 02 55 12.64 +59 49 45.6
Date first 1974 Date last 2011 Obs 14
Pa first 39 Pa last 62.4 P.A. Now (θ) 26.3°
Sep first 0.2 Sep last 0.112 Sep. Now (ρ) 0.144"
Mag pri 8.76 Mag sec 8.87 delta mag (ΔM) 0.11 Spectral class A5V (white)
Pri motion ra -012 Sec motion ra
Pri motion dec -002 Sec motion dec
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 17911 Constellation Cassiopeia SAO 23692 HIP 13597
Tycho2 3713-00833-1 Gaia DR2 464579091929508736 HD 17911 BD BD+59 567
Distance 142.25 Distance ly 464.02




ORBITAL ELEMENTS

Period (P)50.354y± 0.237 Periastron (T)2002.824y± 0.24 Semi-major axis (a)0.1073a± 0.0013
Eccentricity (e)0.53± 0.01 Inclination (i)143.1°± 0.9 Longitude of periastron (ω)239.5°± 2.1
Node (Ω)66.2°± 1.7 Notes ReferenceCve2020b
Equinox Last observation2011 Grade3(1=Definitive, 9=Indet.)

label theta rho
2000 251.3 0.063
2001 235.6 0.056
2002 214.9 0.048
2003 187.2 0.042
2004 155.4 0.042
2005 128.0 0.049
2006 108.6 0.059
2007 95.1 0.070
2008 85.1 0.080
2009 77.4 0.090
2010 71.1 0.099
2011 65.8 0.106
2012 61.1 0.113
2013 57.0 0.119
2014 53.2 0.124
2015 49.7 0.128
2016 46.4 0.132
2017 43.2 0.135
2018 40.2 0.138
2019 37.3 0.140
2020 34.5 0.141
2021 31.7 0.142
2022 29.0 0.143
2023 26.3 0.144
2024 23.6 0.144
2025 20.9 0.143
2026 18.1 0.143
2027 15.4 0.142
2028 12.6 0.140
2029 9.7 0.139
2030 6.8 0.137


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



 
 


wds02552%2B5950b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic