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Doubles in session


Current system
15307+3810
HU 1163
HD 138439


Nearby doubles
27' : 15317+3746
TDS9538

33' : 15282+3822
STF1947

35' : 15333+3827
HJ 2786

37' : 15338+3818
UC 210

41' : 15339+3755
BEU 20

45' : 15317+3903
KZA 96

48' : 15280+3844
CVR1632

57' : 15355+3803
KPP3961

75' : 15311+3925
KZA 94

78' : 15371+3748
JNN 105

79' : 15373+3823
SLW1115

79' : 15344+3916
SKF1756

81' : 15368+3735
LDS4572

83' : 15364+3723
HU 1166AB

86' : 15304+3935
LAW 23AB

86' : 15245+3726
HEI 783

88' : 15245+3723
STFA 28AB
Alkalurops

89' : 15236+3838
RAO 593

90' : 15368+3717
KPP3294

91' : 15272+3930
STF1946

92' : 15317+3941
KZA 95

94' : 15386+3826
ALI 862

110' : 15230+3710
SLW1087

111' : 15381+3918
SLW1120

115' : 15323+4003
KZA 100AB

116' : 15400+3851
CVR1642



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.

15307+3810 HU 1163 (HD 138439)

 
 
15h 30m 44.95s +38° 09' 48.7" P.A. 178.00 sep 0.3 mag 9.23,9.73 Sp G5 dist. 243.31 pc (793.68 l.y.)
 
 
Coord 2000 15307+3810 Discov num HU 1163 Comp Coord arcsec 2000 15 30 44.95 +38 09 48.7
Date first 1905 Date last 2015 Obs 67
Pa first 266 Pa last 177.6 P.A. Now (θ) 196.8°
Sep first 0.4 Sep last 0.252 Sep. Now (ρ) 0.274"
Mag pri 9.23 Mag sec 9.73 delta mag (ΔM) 0.5 Spectral class G5 (yellow)
Pri motion ra +000 Sec motion ra
Pri motion dec -025 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 138439 Constellation Corona Borealis SAO 64747 HIP 75949
Tycho2 3052-01446-1 HD 138439 ADS 9682 BD BD+38 2668
Distance 243.31 Distance ly 793.68
 
 
ORBITAL ELEMENTS
 
 
Period (P)217y± 20 Periastron (T)1989.21y± 0.49 Semi-major axis (a)0.285a± 0.011
Eccentricity (e)0.603± 0.022 Inclination (i)23.2°± 5.1 Longitude of periastron (ω)305°± 14
Node (Ω)123°± 12 Notesn ReferenceHrt2000a
Equinox2000 Last observation1997 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 139.3 0.153
2001 143.4 0.158
2002 147.2 0.163
2003 150.8 0.169
2004 154.2 0.174
2005 157.3 0.179
2006 160.3 0.185
2007 163.1 0.190
2008 165.8 0.195
2009 168.3 0.200
2010 170.8 0.205
2011 173.0 0.210
2012 175.2 0.215
2013 177.3 0.220
2014 179.3 0.225
2015 181.2 0.230
2016 183.1 0.234
2017 184.8 0.239
2018 186.5 0.244
2019 188.1 0.248
2020 189.7 0.253
2021 191.2 0.257
2022 192.7 0.261
2023 194.1 0.266
2024 195.5 0.270
2025 196.8 0.274
2026 198.1 0.278
2027 199.4 0.282
2028 200.6 0.286
2029 201.8 0.290
2030 203.0 0.294
2031 204.1 0.298
2032 205.2 0.302
2033 206.3 0.305
2034 207.3 0.309
2035 208.3 0.313
2036 209.3 0.316
2037 210.3 0.320
2038 211.3 0.323
2039 212.2 0.327
2040 213.1 0.330
2041 214.0 0.333
2042 214.9 0.336
2043 215.8 0.339
2044 216.6 0.343
2045 217.4 0.346
2046 218.3 0.349
2047 219.1 0.351
2048 219.9 0.354
2049 220.6 0.357
2050 221.4 0.360


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds15307%2B3810a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic