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Current system
20527+4607
A 750


Nearby doubles
16' : 20528+4551
COU2647

21' : 20527+4547
TDT2597

22' : 20547+4614
YSC 163

26' : 20539+4632
ES 673

31' : 20508+4628
BRT2276AB

32' : 20519+4537
SMA 122

33' : 20531+4615
HJ 1591

35' : 20494+4613
ES 670

37' : 20562+4615
A 753AB

40' : 20501+4635
ES 671

40' : 20489+4607
HJ 1581

45' : 20499+4640
BU 250

45' : 20535+4523
HDS2975

46' : 20522+4653
BRT2278

49' : 20504+4525
LDS5912

50' : 20489+4537
HDS2965

50' : 20514+4519
ARG 40

52' : 20571+4632
TDT2653

55' : 20500+4521
ES 2702

57' : 20492+4525
COU2646

58' : 20490+4525
SMA 120

61' : 20542+4508
LDS5915

63' : 20541+4507
STT 422

64' : 20585+4626
TDT2667

64' : 20579+4532
ES 677

65' : 20578+4530
ES 676



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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20527+4607 A 750

 
 
20h 52m 44.94s +46° 06' 47.7" P.A. 211.00 sep 0.1 mag 9.11,10.26 Sp G8V dist. 52.71 pc (171.94 l.y.)
 
 
Coord 2000 20527+4607 Discov num A   750 Comp Coord arcsec 2000 20 52 44.94 +46 06 47.7
Date first 1904 Date last 2010 Obs 36
Pa first 250 Pa last 210.7 P.A. Now (θ) 258°
Sep first 0.3 Sep last 0.133 Sep. Now (ρ) 0.339"
Mag pri 9.11 Mag sec 10.26 delta mag (ΔM) 1.15 Spectral class G8V (yellow)
Pri motion ra -033 Sec motion ra
Pri motion dec -024 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus SAO 50171 HIP 103055 Gaia DR2 2163403515533704320
ADS 14396 BD BD+45 3310 Distance 52.71 Distance ly 171.94
 
 
ORBITAL ELEMENTS
 
 
Period (P)30.45y Periastron (T)2013.49y Semi-major axis (a)0.212a
Eccentricity (e)0.723 Inclination (i)128.7° Longitude of periastron (ω)351.6°
Node (Ω)65.9° Notesn ReferenceDoc2013f
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 248.2 0.362
2001 246.4 0.357
2002 244.5 0.350
2003 242.6 0.339
2004 240.5 0.326
2005 238.3 0.309
2006 235.7 0.289
2007 232.7 0.265
2008 229.1 0.236
2009 224.3 0.203
2010 217.5 0.165
2011 206.0 0.120
2012 179.7 0.073
2013 108.3 0.052
2014 37.9 0.059
2015 337.2 0.070
2016 305.4 0.105
2017 290.3 0.145
2018 281.6 0.181
2019 275.7 0.214
2020 271.3 0.243
2021 267.8 0.269
2022 264.9 0.291
2023 262.3 0.310
2024 260.1 0.326
2025 258.0 0.339
2026 256.1 0.349
2027 254.2 0.356
2028 252.4 0.361
2029 250.7 0.363
2030 248.9 0.363
2031 247.2 0.359
2032 245.4 0.353
2033 243.5 0.344
2034 241.5 0.332
2035 239.3 0.317
2036 236.9 0.299
2037 234.1 0.276
2038 230.8 0.250
2039 226.6 0.219
2040 220.9 0.183
2041 212.0 0.141
2042 194.8 0.094
2043 146.7 0.054
2044 67.2 0.059
2045 1.9 0.061
2046 316.5 0.088
2047 296.0 0.127
2048 285.1 0.165
2049 278.1 0.200
2050 273.2 0.231


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds20527%2B4607a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic