00318+5431 STT 12 (Lam Cas)

 
 
00h 31m 46.32s +54 31' 20.3" P.A. 220.00 sep 0.1 mag 5.33,5.62 Sp B8V+B9V dist. 115.74 pc (377.54 l.y.)
 
 
Coord 2000 00318+5431 Discov num STT  12 Comp Coord arcsec 2000 00 31 46.32 +54 31 20.3
Date first 1845 Date last 2019 Obs 275
Pa first 122 Pa last 219.7 P.A. Now (θ) 294.2°
Sep first 0.3 Sep last 0.117 Sep. Now (ρ) 0.087"
Mag pri 5.33 Mag sec 5.62 delta mag (ΔM) 0.29 Spectral class B8V+B9V (blue-white/blue-white)
Pri motion ra +041 Sec motion ra
Pri motion dec -015 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Lam Cas Constellation Cassiopeia SAO 21489 HIP 2505
Tycho2 3658-02414-1 Gaia DR2 418090121095577216 HD 2772 HR 123
GC 618 ADS 434 BD BD+53 82 Bayer Lambda Cassiopeiae
Bayer name Lam Cas Flamsteed 14 Cassiopeiae Flamsteed name 14 Cas Distance 115.74
Distance ly 377.54 Bayer greek λ Cas
 
 
ORBITAL ELEMENTS
 
 
Period (P)245.7y± 35.96 Periastron (T)2025.54y± 4.65 Semi-major axis (a)0.448a± 0.028
Eccentricity (e)0.689± 0.119 Inclination (i)53.6°± 5.2 Longitude of periastron (ω)301°± 2.6
Node (Ω)17.6°± 9.6 Notesn ReferenceDru2014
Equinox Last observation2010 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 196.9 0.372
2001 197.9 0.362
2002 198.8 0.353
2003 199.9 0.343
2004 201.0 0.332
2005 202.2 0.322
2006 203.4 0.311
2007 204.8 0.299
2008 206.3 0.287
2009 207.9 0.274
2010 209.7 0.261
2011 211.6 0.248
2012 213.8 0.234
2013 216.2 0.220
2014 219.1 0.205
2015 222.3 0.189
2016 226.2 0.174
2017 230.8 0.158
2018 236.5 0.142
2019 243.5 0.126
2020 252.5 0.112
2021 263.9 0.100
2022 278.1 0.091
2023 294.2 0.087
2024 310.8 0.089
2025 325.9 0.096
2026 338.4 0.106
2027 348.5 0.118
2028 356.7 0.131
2029 3.4 0.143
2030 9.1 0.155


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



 
 


wds00318%2B5431a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic