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Current system
15278+2906
JEF 1
Nusakan


Nearby doubles
5' : 15279+2902
TDS9523

16' : 15283+2920
CVR 166

28' : 15298+2857
YSC 223

30' : 15268+2840
COU 484

37' : 15283+2943
KZA 91

49' : 15248+2934
KZA 87

50' : 15242+2920
CVR1627

50' : 15269+2955
TDS9520

56' : 15319+2851
TSN 173

57' : 15295+2959
KPP 834

61' : 15232+2909
TDS9502

64' : 15266+3008
WIS 286

67' : 15275+3012
CVR1631

71' : 15307+2805
COU 796

72' : 15241+2814
TDS9506

79' : 15266+2749
UC 3004

80' : 15255+3020
KZA 88

81' : 15335+2936
TDS9548

81' : 15238+3007
KZA 86

88' : 15215+2933
LDS4546

88' : 15259+3031
KZA 89

92' : 15311+2747
J 3321

93' : 15303+2739
STF1951

94' : 15232+3017
STF1937AB

96' : 15347+2938
TDS9550AB

98' : 15219+2807
GIC 127AB



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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.

15278+2906 JEF 1 (Nusakan)

 
 
15h 27m 49.85s +29° 06' 19.8" P.A. 140.00 sep 0.3 mag 3.68,5.20 Sp A5+F2 dist. 34.28 pc (111.82 l.y.)
 
 
Coord 2000 15278+2906 Discov num JEF   1 Comp Coord arcsec 2000 15 27 49.85 +29 06 19.8
Date first 1973 Date last 2019 Obs 192
Pa first 158 Pa last 139.9 P.A. Now (θ) 166°
Sep first 0.2 Sep last 0.272 Sep. Now (ρ) 0.191"
Mag pri 3.68 Mag sec 5.20 delta mag (ΔM) 1.52 Spectral class A5+F2 (white/yellow-white)
Pri motion ra -179 Sec motion ra
Pri motion dec +086 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Nusakan Constellation Corona Borealis SAO 83831 HIP 75695
Tycho2 2032-01605-1 Gaia DR2 1273423791418345344 HD 137909 HR 5747
GC 20795 BD BD+29 2670 Bayer Beta Coronae Borealis Bayer name Bet CrB
Flamsteed 3 Coronae Borealis Flamsteed name 3 CrB FK5 572 Distance 34.28
Distance ly 111.82 Bayer greek β CrB
Meaning the two series (sequences)
 
 
ORBITAL ELEMENTS
 
 
Period (P)10.549y± 0.004 Periastron (T)1906.632y± 0.037 Semi-major axis (a)0.207a± 0.001
Eccentricity (e)0.525± 0.005 Inclination (i)110.813°± 0.556 Longitude of periastron (ω)180.569°± 1.215
Node (Ω)148.321°± 0.341 Notesn ReferenceJAA2023
Equinox Last observation Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 111.6 0.105
2001 3.2 0.067
2002 304.8 0.077
2003 190.3 0.091
2004 165.7 0.193
2005 157.3 0.265
2006 152.0 0.305
2007 147.4 0.315
2008 142.8 0.295
2009 136.8 0.244
2010 125.9 0.162
2011 79.3 0.061
2012 333.8 0.097
2013 249.8 0.052
2014 174.7 0.140
2015 161.3 0.230
2016 154.7 0.287
2017 149.9 0.314
2018 145.4 0.310
2019 140.3 0.276
2020 132.9 0.211
2021 115.2 0.115
2022 13.9 0.060
2023 311.4 0.085
2024 196.2 0.081
2025 167.0 0.184
2026 157.9 0.260
2027 152.4 0.303
2028 147.9 0.316
2029 143.3 0.298
2030 137.5 0.251
2031 127.4 0.171
2032 89.6 0.069
2033 338.6 0.093
2034 265.5 0.054
2035 177.1 0.129
2036 162.1 0.222
2037 155.2 0.283
2038 150.3 0.312
2039 145.9 0.312
2040 140.9 0.281
2041 133.8 0.219
2042 118.2 0.125
2043 27.0 0.055
2044 317.0 0.091
2045 203.7 0.071
2046 168.3 0.175
2047 158.6 0.254
2048 152.9 0.300
2049 148.3 0.316
2050 143.7 0.301


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds15278%2B2906b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic