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 |
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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) |
306.4° |
|
| Sep first |
0.2 |
|
Sep last |
0.272 |
|
Sep. Now (ρ) |
0.077" |
|
| 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 |
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| 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) | 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 |
Notes | n | |
Reference | Mut2010b | |
| Equinox | 2000 | |
Last observation | 2008 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
112.3 |
0.107 |
| 2001 |
4.5 |
0.064 |
| 2002 |
300.5 |
0.071 |
| 2003 |
187.4 |
0.097 |
| 2004 |
165.1 |
0.197 |
| 2005 |
157.0 |
0.266 |
| 2006 |
151.7 |
0.305 |
| 2007 |
147.2 |
0.314 |
| 2008 |
142.5 |
0.294 |
| 2009 |
136.5 |
0.244 |
| 2010 |
125.7 |
0.163 |
| 2011 |
80.7 |
0.062 |
| 2012 |
332.3 |
0.093 |
| 2013 |
237.8 |
0.053 |
| 2014 |
173.2 |
0.146 |
| 2015 |
160.7 |
0.233 |
| 2016 |
154.3 |
0.288 |
| 2017 |
149.5 |
0.312 |
| 2018 |
145.1 |
0.308 |
| 2019 |
140.0 |
0.274 |
| 2020 |
132.5 |
0.210 |
| 2021 |
114.9 |
0.115 |
| 2022 |
13.0 |
0.059 |
| 2023 |
306.4 |
0.077 |
| 2024 |
191.1 |
0.090 |
| 2025 |
166.0 |
0.191 |
| 2026 |
157.4 |
0.262 |
| 2027 |
152.0 |
0.303 |
| 2028 |
147.5 |
0.314 |
| 2029 |
142.8 |
0.296 |
| 2030 |
137.0 |
0.249 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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