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Doubles in session


Current system
00318+5431
STT 12
Lam Cas


Nearby doubles
12' : 00327+5439
TOI1557

13' : 00311+5420
TDS1502

18' : 00321+5449
STI1371AB

22' : 00304+5449
TDS1496

23' : 00306+5412
TDS1499

24' : 00311+5454
ES 933

32' : 00353+5440
TDS1532

38' : 00275+5435
STI1352

41' : 00272+5435
TDS1467

42' : 00323+5513
TDS1512

43' : 00326+5513
RAS 17

43' : 00308+5513
TDS1501

51' : 00261+5422
TDS1461

58' : 00352+5343
TDS1531

58' : 00272+5513
STI1351

61' : 00352+5524
TDS 21

62' : 00292+5528
STI1360

62' : 00370+5513
HDS 85

64' : 00332+5528
STI1377

64' : 00312+5535
TDS1504

66' : 00365+5341
TDS1546

67' : 00275+5335
HEI 914

69' : 00310+5539
ES 116

71' : 00278+5330
LDS5275

72' : 00295+5323
ES 613

74' : 00288+5541
MLR 624



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

00318+5431 STT 12 (Lam Cas)

 
 
00h 31m 46.32s +54° 31' 20.3" P.A. 242.00 sep 0.2 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 2024 Obs 277
Pa first 122 Pa last 241.8 P.A. Now (θ) 338.4° (calc)
Sep first 0.3 Sep last 0.2 Sep. Now (ρ) 0.106" (calc)
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
2031 14.0 0.166
2032 18.4 0.175
2033 22.3 0.184
2034 25.9 0.192
2035 29.2 0.199
2036 32.3 0.205
2037 35.2 0.210
2038 38.0 0.216
2039 40.7 0.220
2040 43.2 0.224
2041 45.7 0.228
2042 48.1 0.232
2043 50.4 0.235
2044 52.7 0.239
2045 54.9 0.242
2046 57.0 0.245
2047 59.1 0.247
2048 61.1 0.250
2049 63.1 0.253
2050 65.1 0.256


 
 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