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Doubles in session


Current system
15329+3122
COU 610
The CrB


Nearby doubles
9' : 15331+3113
COU 611

29' : 15314+3102
TDS9535

44' : 15344+3201
HU 746

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COU 799

58' : 15288+3101
A 1369AB

59' : 15355+3033
TDS9555

74' : 15274+3102
KZA 90

80' : 15301+3232
UC 3016

82' : 15268+3102
TDS9517

83' : 15392+3140
TDS9577

83' : 15378+3026
BRT 252

91' : 15381+3225
CFN 12

91' : 15258+3117
UC 3001

94' : 15295+2959
KPP 834

96' : 15393+3033
GRV 909

97' : 15369+2959
DEA 52

98' : 15406+3128
COU 613

99' : 15275+3012
CVR1631

99' : 15379+3006
STF1963AB

101' : 15404+3151
TDS 782

103' : 15259+3031
KZA 89

104' : 15356+2944
TDS9557

106' : 15347+2938
TDS9550AB

106' : 15335+2936
TDS9548

110' : 15246+3147
LEP 145

110' : 15415+3129
TDS9590



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

15329+3122 COU 610 (The CrB)

 
 
15h 32m 55.78s +31° 21' 32.9" P.A. 198.00 sep 0.8 mag 4.27,6.29 Sp B6Vnne dist. 115.07 pc (375.36 l.y.)
 
 
Coord 2000 15329+3122 Discov num COU 610 Comp Coord arcsec 2000 15 32 55.78 +31 21 32.9
Date first 1971 Date last 2016 Obs 103
Pa first 203 Pa last 197.8 P.A. Now (θ) 197.8°
Sep first 0.5 Sep last 0.844 Sep. Now (ρ) 0.844"
Mag pri 4.27 Mag sec 6.29 delta mag (ΔM) 2.02 Spectral class B6Vnne (blue-white)
Pri motion ra -020 Sec motion ra -020
Pri motion dec -006 Sec motion dec -006
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name The CrB Var name 7134/5 Constellation Corona Borealis SAO 64769
HIP 76127 Tycho2 2564-01629-1 Gaia DR2 1274286186493145728 HD 138749
HR 5778 GC 20908 BD BD+31 2750 Bayer Theta Coronae Borealis
Bayer name The CrB Flamsteed 4 Coronae Borealis Flamsteed name 4 CrB FK5 576
Distance 115.07 Distance ly 375.36 Bayer greek θ CrB
 
 
ORBITAL ELEMENTS
 
 
Period (P)361.1y± 76.8 Periastron (T)1943y± 0.7 Semi-major axis (a)0.826a± 0.118
Eccentricity (e)0.78± 0.054 Inclination (i)100.5°± 3.2 Longitude of periastron (ω)66.5°± 8.8
Node (Ω)26.9°± 2.5 Notesn ReferenceKsr2021
Equinox Last observation2016 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 199.9 0.790
2001 199.8 0.794
2002 199.6 0.797
2003 199.5 0.801
2004 199.4 0.804
2005 199.3 0.807
2006 199.2 0.810
2007 199.0 0.813
2008 198.9 0.816
2009 198.8 0.818
2010 198.7 0.821
2011 198.6 0.823
2012 198.5 0.825
2013 198.3 0.828
2014 198.2 0.830
2015 198.1 0.832
2016 198.0 0.833
2017 197.9 0.835
2018 197.8 0.837
2019 197.7 0.838
2020 197.6 0.839
2021 197.5 0.841
2022 197.3 0.842
2023 197.2 0.843
2024 197.1 0.844
2025 197.0 0.845
2026 196.9 0.846
2027 196.8 0.846
2028 196.7 0.847
2029 196.6 0.848
2030 196.5 0.848
2031 196.4 0.848
2032 196.3 0.849
2033 196.2 0.849
2034 196.0 0.849
2035 195.9 0.849
2036 195.8 0.849
2037 195.7 0.849
2038 195.6 0.849
2039 195.5 0.848
2040 195.4 0.848
2041 195.3 0.848
2042 195.2 0.847
2043 195.1 0.847
2044 195.0 0.846
2045 194.9 0.845
2046 194.8 0.845
2047 194.6 0.844
2048 194.5 0.843
2049 194.4 0.842
2050 194.3 0.841


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds15329%2B3122a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic