15278+2906 JEF   1 (Nusakan)

 
 
15h 27m 49.85s +29 06' 19.8" P.A. 149.5 sep 0.31 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
2012
Obs
189
Pa first
158
Pa last
327
P.A. Now (θ)
149.5°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.31"
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
 
 
Precise pa
327.1
Precise sep
0.094
Common name
Nusakan
Meaning
the two series (sequences)
Constellation
Corona Borealis
SAO
83831
HIP
75695
Tycho2
2032-01605-1
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
Distance
34.28
Distance ly
111.82
last precise pa
327.1
last precise sep
0.094
 
 
ORBITAL ELEMENTS
 
 
Period (P)3848.54d (10.54y)± 0.52 Periastron (T)44412.8m (1980.475y)± 1.4 Semi-major axis (a)204.008m± 0.034
Eccentricity (e)0.53971± 0.00021 Inclination (i)111.452°± 0.014 Longitude of periastron (ω)180.21°± 0.13
Node (Ω)148.041°± 0.03 Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.107 112.3
2001 0.064 4.5
2002 0.071 300.5
2003 0.097 187.4
2004 0.197 165.1
2005 0.266 157.0
2006 0.305 151.7
2007 0.314 147.2
2008 0.294 142.5
2009 0.244 136.5
2010 0.163 125.7
2011 0.062 80.7
2012 0.093 332.3
2013 0.053 237.8
2014 0.146 173.2
2015 0.233 160.7
2016 0.288 154.3
2017 0.312 149.5
2018 0.308 145.1
2019 0.274 140.0
2020 0.210 132.5
2021 0.115 114.9
2022 0.059 13.0
2023 0.077 306.4
2024 0.090 191.1
2025 0.191 166.0
2026 0.262 157.4
2027 0.303 152.0
2028 0.314 147.5
2029 0.296 142.8
2030 0.249 137.0

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds15278%2B2906a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
15278+2906 JEF 1 2005 105 154 0.2 3.68 5.20 F0p NOD 152749.85+290619.8
15278+2906 JEF 1 2007 106 142 0.3 3.68 5.20 F0p NOD 152749.85+290619.8
15278+2906 JEF 1 2008 108 140 0.3 3.68 5.20 A5 F2 NOD 152749.85+290619.8
15278+2906 JEF 1 2009 182 131 0.2 3.68 5.20 A5 F2 NOD 152749.85+290619.8
15278+2906 JEF 1 2010 184 123 0.1 3.68 5.20 A5 F2 NO 152749.85+290619.8
15278+2906 JEF 1 2012 189 327 0.1 3.68 5.20 A5+F2 NO 152749.85+290619.8

If you need more information about this double, apply for a data request form to the WDS.