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Doubles in session


Current system
16171+5516
BLA 3
CR Dra


Nearby doubles
23' : 16147+5526
SKF 279

23' : 16177+5454
TDS 808

54' : 16194+5606
STI2338

62' : 16243+5520
SKF 242

65' : 16132+5422
TDS9800

66' : 16187+5412
CVR1662

67' : 16195+5620
CVR 184

68' : 16128+5613
SLW1167

68' : 16238+5441
TDS9878

70' : 16103+5439
ES 967

71' : 16122+5613
SLW1166

78' : 16255+5547
UC 3167

88' : 16225+5402
TDS9868

89' : 16271+5457
CVR 821

91' : 16140+5350
LDS4655

92' : 16081+5605
STI2331

93' : 16254+5418
BWL 43

98' : 16065+5441
MLB 135

100' : 16055+5504
CVR 811

100' : 16055+5511
TOI4045

102' : 16065+5604
YSC 110

110' : 16276+5415
ES 630

114' : 16248+5649
STI2340

116' : 16051+5426
ES 743

116' : 16306+5521
STI2342

119' : 16243+5658
KPP3997



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Binary Systems
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Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

16171+5516 BLA 3 (CR Dra)

 
 
16h 17m 05.38s +55° 16' 09.0" P.A. 9.00 sep 0.1 mag 10.20,11.90 Sp M1.5Ve dist. 20.53 pc (66.97 l.y.)
 
 
Coord 2000 16171+5516 Discov num BLA   3 Comp Coord arcsec 2000 16 17 05.38 +55 16 09.0
Date first 1986 Date last 2019 Obs 15
Pa first 36 Pa last 8.5 P.A. Now (θ) 234.2°
Sep first 0.1 Sep last 0.097 Sep. Now (ρ) 0.143"
Mag pri 10.20 Mag sec 11.90 delta mag (ΔM) 1.7 Spectral class M1.5Ve (red)
Pri motion ra +088 Sec motion ra
Pri motion dec -431 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name CR Dra Constellation Draco HIP 79796 BD BD+55 1823
Distance 20.53 Distance ly 66.97
 
 
ORBITAL ELEMENTS
 
 
Period (P)4.04y± 0.005 Periastron (T)2005.72y± 0.005 Semi-major axis (a)0.148a± 0.002
Eccentricity (e)0.17± 0.002 Inclination (i)119.5°± 1 Longitude of periastron (ω)299.9°± 2
Node (Ω)63.5°± 1.5 Notesn ReferenceTam2008
Equinox2000 Last observation2007 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 264.6 0.144
2001 220.5 0.115
2002 73.8 0.121
2003 5.3 0.090
2004 266.5 0.141
2005 223.3 0.120
2006 76.5 0.117
2007 9.8 0.093
2008 268.4 0.138
2009 225.8 0.125
2010 79.3 0.113
2011 14.1 0.096
2012 270.5 0.134
2013 228.1 0.130
2014 82.4 0.108
2015 18.1 0.099
2016 272.6 0.131
2017 230.3 0.135
2018 85.8 0.103
2019 21.8 0.102
2020 274.9 0.127
2021 232.3 0.139
2022 89.6 0.097
2023 25.3 0.105
2024 277.3 0.123
2025 234.2 0.143
2026 93.8 0.092
2027 28.6 0.109
2028 279.9 0.119
2029 236.0 0.146
2030 98.6 0.086
2031 31.7 0.112
2032 282.6 0.116
2033 237.7 0.149
2034 104.1 0.081
2035 34.7 0.116
2036 285.6 0.112
2037 239.4 0.152
2038 110.3 0.075
2039 37.4 0.119
2040 288.7 0.108
2041 241.0 0.154
2042 117.5 0.071
2043 40.1 0.122
2044 292.1 0.104
2045 242.6 0.156
2046 125.5 0.067
2047 42.6 0.124
2048 295.7 0.101
2049 244.1 0.158
2050 134.5 0.064


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds16171%2B5516a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic