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Doubles in session


Current system
20080+4204
A 383
HD 227855


Nearby doubles
8' : 20082+4210
TDS1045

20' : 20080+4223
A 382

22' : 20099+4200
CVR 219

25' : 20097+4149
TDT2037

31' : 20107+4208
COU2637

40' : 20097+4130
HDS2871

42' : 20111+4131
HJ 1491

48' : 20114+4232
ES 1566

50' : 20090+4252
OSO 118AB

51' : 20042+4234
HJ 2929AB

61' : 20133+4214
COU2638

62' : 20045+4116
HJ 1475

63' : 20024+4204
SKF1318

71' : 20142+4216
TDT2110

71' : 20033+4116
KPP4183

71' : 20144+4206
STT 403AB

72' : 20031+4118
TDT1936

77' : 20105+4316
ROE 41

81' : 20090+4045
HJ 1487AB

81' : 20097+4046
BRT2254

83' : 20111+4048
TDT2057

86' : 20027+4102
TDT1931

86' : 20143+4115
COU2639

86' : 20052+4044
A 381

87' : 20030+4310
TDS1035

87' : 20079+4330
STJ 94



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.

20080+4204 A 383 (HD 227855)

 
 
20h 08m 00.45s +42° 03' 39.4" P.A. 2.00 sep 0.3 mag 10.37,10.43 Sp F2
 
 
Coord 2000 20080+4204 Discov num A   383 Comp Coord arcsec 2000 20 08 00.45 +42 03 39.4
Date first 1902 Date last 2021 Obs 17
Pa first 55 Pa last 2.3 P.A. Now (θ) 2.3°
Sep first 0.3 Sep last 0.283 Sep. Now (ρ) 0.283"
Mag pri 10.37 Mag sec 10.43 delta mag (ΔM) 0.06 Spectral class F2 (yellow-white)
Pri motion ra -006 Sec motion ra -006
Pri motion dec -004 Sec motion dec -004
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 227855 Constellation Cygnus SAO 49214 Tycho2 3158-01559-1
HD 227855 ADS 13418
 
 
ORBITAL ELEMENTS
 
 
Period (P)453y Periastron (T)2318.9y Semi-major axis (a)0.478a
Eccentricity (e)0.678 Inclination (i)115° Longitude of periastron (ω)94°
Node (Ω)251° Notes ReferenceHrt2013c
Equinox2000 Last observation2008 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 16.7 0.351
2001 16.2 0.350
2002 15.8 0.350
2003 15.3 0.350
2004 14.9 0.349
2005 14.4 0.349
2006 13.9 0.348
2007 13.5 0.348
2008 13.0 0.347
2009 12.5 0.347
2010 12.1 0.347
2011 11.6 0.346
2012 11.1 0.346
2013 10.6 0.345
2014 10.2 0.345
2015 9.7 0.345
2016 9.2 0.344
2017 8.7 0.344
2018 8.3 0.344
2019 7.8 0.343
2020 7.3 0.343
2021 6.8 0.343
2022 6.4 0.342
2023 5.9 0.342
2024 5.4 0.342
2025 4.9 0.341
2026 4.4 0.341
2027 3.9 0.341
2028 3.4 0.340
2029 3.0 0.340
2030 2.5 0.340
2031 2.0 0.339
2032 1.5 0.339
2033 1.0 0.339
2034 0.5 0.339
2035 0.0 0.338
2036 359.5 0.338
2037 359.0 0.338
2038 358.5 0.338
2039 358.0 0.338
2040 357.5 0.337
2041 357.1 0.337
2042 356.6 0.337
2043 356.1 0.337
2044 355.6 0.337
2045 355.1 0.337
2046 354.6 0.337
2047 354.1 0.336
2048 353.6 0.336
2049 353.1 0.336
2050 352.6 0.336


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds20080%2B4204a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic