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Doubles in session


Current system
21053+0044
HDS 3007
HD 200747


Nearby doubles
31' : 21034-0050
CVR 885

32' : 21039+0106
BAL1223

33' : 21069-0020
J 1718

38' : 21073-0021
BAL 930

40' : 21029-0028
TDT2713

40' : 21043+0008
BAL 929

43' : 21025+0038
HDO 320

48' : 21075-0010
STF2755

51' : 21020+0055
BAL1222

52' : 21086+0059
BAL1224

53' : 21069+0131
BAL1579

53' : 21089-0052
BAL 619

58' : 21016-0029
NSN 500AB

60' : 21031+0132
STF2744AB

61' : 21093+0048
BAL1225

62' : 21089+0013
BU 837

63' : 21016-0014
TDT2701

69' : 21059+0152
YSC 71

77' : 21104-0042
BAL 620

80' : 21101+0118
HDO 318

82' : 21103-0016
LDS4866

82' : 21084+0151
BAL1580

83' : 21002-0014
TDS1110

87' : 21111+0041
SKF1774

88' : 21110+0102
A 2287

91' : 21067+0212
SLN 88



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.

21053+0044 HDS 3007 (HD 200747)

 
 
21h 05m 19.23s +00° 43' 37.4" P.A. 275.00 sep 0.1 mag 8.11,9.48 Sp F0 dist. 120.34 pc (392.55 l.y.)
 
 
Coord 2000 21053+0044 Discov num HDS3007 Comp Coord arcsec 2000 21 05 19.23 +00 43 37.4
Date first 1991 Date last 2023 Obs 11
Pa first 302 Pa last 274.8 P.A. Now (θ) 281.4°
Sep first 0.1 Sep last 0.148 Sep. Now (ρ) 0.143"
Mag pri 8.11 Mag sec 9.48 delta mag (ΔM) 1.37 Spectral class F0 (yellow-white)
Pri motion ra -010 Sec motion ra
Pri motion dec +013 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 200747 Constellation Aquarius SAO 126532 HIP 104090
Tycho2 0526-01687-1 Gaia DR2 2690307492047588736 HD 200747 BD BD+00 4657
Distance 120.34 Distance ly 392.55
 
 
ORBITAL ELEMENTS
 
 
Period (P)26y Periastron (T)2005.24y Semi-major axis (a)0.117a
Eccentricity (e)0.5 Inclination (i)116.9° Longitude of periastron (ω)127.1°
Node (Ω)267.1° Notes ReferenceTok2021c
Equinox2000 Last observation2019 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 267.9 0.128
2001 262.8 0.113
2002 255.8 0.092
2003 243.6 0.065
2004 210.5 0.035
2005 130.4 0.035
2006 95.4 0.060
2007 78.9 0.072
2008 65.2 0.074
2009 50.9 0.070
2010 34.5 0.065
2011 16.5 0.064
2012 358.6 0.066
2013 342.6 0.072
2014 329.6 0.080
2015 319.4 0.090
2016 311.3 0.101
2017 304.7 0.112
2018 299.2 0.121
2019 294.5 0.130
2020 290.3 0.137
2021 286.5 0.142
2022 282.9 0.145
2023 279.4 0.146
2024 275.8 0.143
2025 272.1 0.138
2026 267.9 0.128
2027 262.8 0.113
2028 255.8 0.092
2029 243.6 0.065
2030 210.5 0.035
2031 130.4 0.035
2032 95.4 0.060
2033 78.9 0.072
2034 65.2 0.074
2035 50.9 0.070
2036 34.5 0.065
2037 16.5 0.064
2038 358.6 0.066
2039 342.6 0.072
2040 329.6 0.080
2041 319.4 0.090
2042 311.3 0.101
2043 304.7 0.112
2044 299.2 0.121
2045 294.5 0.130
2046 290.3 0.137
2047 286.5 0.142
2048 282.9 0.145
2049 279.4 0.146
2050 275.8 0.143


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds21053%2B0044a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic