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) | 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 | |||||||||
Notes | N O (See Notes, Orbital solution) |
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) |
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.) |
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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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discov_num | notes | refcode |
JEF 1 | bet CrB = 3 CrB = Nusakan. A spectroscopic binary resolved visually, | |
and avariable of Alpha CVn-type. | ||
1973.22, 1973.45: See discussion and orbital elements by Labeyrie et | ||
al. (1974). | Lab1974 | |
1975.383, 1975.455: The observations presented here are of poor | ||
quality but the results are consistent with those of Labeyrie et al. | ||
and McAlister. | BLM1978 | |
1980.4682: See preliminary elements and discussion in Balega et al. | ||
(1984). | Bag1984b | |
1983.3206: A peculiar SB with a 10.5-year period. | Bag1984a | |
1984.1867 and other observations through 1985.2440: The speckle | ||
interferometric observations are in good agreement with both Balega et | Bag1984b | |
al. (1984) and Tokovinin (1984) orbits; radial velocity measurements | Tok1984 | |
are strongly needed to improve the spectroscopic orbit of this system. | Bnu1986 | |
Measure of 1988.256 made by MAPPIT. | Naj1989 | |
The speckle observations and derived masses leave no room for a | ||
conjectured third component, cf. Kamper et al. (1990). | Kpr1990 | |
Hipparcos astrometric solution adopted some elements from the orbit of | HIP1997d | |
Kamper et al. (1990). | ||
Based on combined observations from VLT/Naco and CHARA/FLOUR, Bruntt | ||
et al. (2010) derive the following parameters for the components of | Bnt2010 | |
bet CrB: radii 2.63 +/- 0.09 and 1.56 +/- 0.07 Rsun, spectral types A5 | ||
and F2, luminosities 25.2 +/- 2.9 and 4.5 +/- 0.05 Lsun, Teff 7980 +/- | ||
180 and 6750 +/- 230K, masses 2.09 +/- 0.15 and 1.40 +/- 0.10 Msun. | ||
The age of the systems is estimated at 0.53 +/- 0.10 Gyr. | ||
Combined spectroscopic/astrometric solution of SB1. Radial velocities | ||
span nearly a century. Calculated masses 1.71 +/- 0.18 and 1.330 +/- | ||
0.074 Msun. | Mut2010b | |
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic | ||
masses of 3.08 +/- 0.24, 4.09, and 3.17 Msun, respectively. | Mlk2012 |
refcode | metd | author | reference |
Bag1984a | S j | Balega, Y.Y. & Ryadchenko, V.P. | 1984SvAL...10...95B |
Bag1984a | SvAL 10, 95, 1984 | ||
Bag1984b | S j | Balega, Y.Y., Bonneau, D., & Foy, R | 1984A&AS...57...31B |
Bag1984b | A&AS 57, 31, 1984 | ||
BLM1978 | S j | Morgan, B.L., Beddoes, D.R., Scaddan, R.J. & Dainty, J.C. | 1978MNRAS.183..701M |
BLM1978 | MNRAS 183, 701, 1978 | ||
Bnt2010 | Ao j | Bruntt, H., Kervella, P., Merand, A., Brandao, I.M., Bedding, T.R., | 2010A&A...512A..55B |
Bnt2010 | ten Brummelaar, T.A., Coude Du Foresto, V., Cunha, M.S., et al. | ||
Bnt2010 | A&A 512, 55, 2010 | ||
Bnu1986 | S j | Bonneau, D., Balega, Y., Blazit, A, Foy, R., Vakili, F., & Vidal, J.L. | 1986A&AS...65...27B |
Bnu1986 | A&AS 65, 27, 1986 | ||
HIP1997d | orb - | Hipparcos | 1997yCat.1239....0E |
HIP1997d | Hipparcos Catalog, ESA SP-1200, 1997 | ||
HIP1997d | (DMSA/O Orbital Solutions) | ||
Kpr1990 | orb - | Kamper, K.W., McAlister, H.A., & Hartkopf, W.I. | 1990AJ....100..239K |
Kpr1990 | AJ 100, 239, 1990 | ||
Lab1974 | S j | Labeyrie, A., Bonneau, D., Stachnik, R.V., & Gezari, D.Y. | 1974ApJ...194L.147L |
Lab1974 | +orb | ApJ 194, L147, 1974 | |
Lab1974 | (data from Hale 5m, KPNO 3.8m, 2.1m. Aperture listed as mean value of 3.6m unless | ||
Lab1974 | specifically given in paper) | ||
Mlk2012 | not - | Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. | 2012A&A...546A..69M |
Mlk2012 | A&A 546, A69, 2012 | ||
Mut2010b | Kp - | Muterspaugh, M.W., Hartkopf, W.I., Lane. B.F., O'Connell, J., Williamson, M., | 2010AJ....140.1623M |
Mut2010b | Kulkarni, S.R., Konacki, M., Burke, B.F., Colavita, M.M., Shao, M., & | ||
Mut2010b | Wiktorowicz, S.J. | ||
Mut2010b | AJ 140, 1623, 2010 | ||
Naj1989 | Sa j | Nakajima, T., Kulkarni, S.R., Gorham, P.W., Ghez, A.M., Neugebauer, G., Oke, J.B., | 1989AJ.....97.1510N |
Naj1989 | Prince, T.A., & Readhead, A.C.S. | ||
Naj1989 | AJ 97, 1510, 1989 | ||
Tok1984 | orb - | Tokovinin, A.A. | 1984SvAL...10..121T |
Tok1984 | SvAL 10, 121, 1984 |
idgroup | discov | author |
1 | JEF | Jeffers, H.M. |
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 | |
15278+2906 | JEF 1 | 2019 | 192 | 140 | 0.3 | 3.68 | 5.20 | A5+F2 | NO | 152749.85+290619.8 |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
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A | |
B | pa=143.7° sep=0.26" |
Componente originario normalizzato | AB | Common name | Nusakan | Meaning | the two series (sequences) | Coord arcsec 2000 | 152749.85+290619.8 | ||||
Mag | 3.68 | Spectral class | A5 (white) | PmRA | -179.00 | PmDE | 86.0 | ||||
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 | FK5 | 572 |
Tycho2 | 2032-01605-1 | Pflag | RAmdeg | 231.95721428 | DEmdeg | 29.10569774 | |||||
PmRA | -181.5 | PmDE | 85.2 | E RAmdeg | 3 | E DEmdeg | 3 | ||||
E pmRA | 0.6 | E pmDE | 0.5 | EpRAm | 1991.28 | EpDEm | 1991.33 | ||||
Num | 22 | Q RAmdeg | 1.3 | Q DEmdeg | 1.0 | Q pmRA | 1.2 | ||||
Q pmDE | 1.2 | BTmag | 3.990 | E BTmag | 0.014 | VTmag | 3.672 | ||||
E VTmag | 0.009 | Prox | 999 | TYC | T | HIP | 75695 | ||||
CCDM | RAdeg | 231.95769139 | DEdeg | 29.10550250 | EpRA 1990 | 1.74 | |||||
EpDE 1990 | 1.76 | E RAdeg | 3.2 | E DEdeg | 3.1 | Posflg | |||||
Corr | -0.1 |
SAO | 83831 | DelFlag | RA1950 | PmRA1950 | -0.0137 | ||||||
DE1950 | PmDE1950 | 0.083 | Vmag | 3.7 | SpType | F0p | |||||
Double code | Source | 74 | CatNum | 572 | DM | BD+29 2670 | |||||
DMcomp | BDsup | HD | 137909 | M HD | 0 | ||||||
GC | 20795 | RA1950rad | 4.03941502 | DE1950rad | 0.51098034 | PmRA2000 | -0.0135 | ||||
PmDE2000 | 0.085 |
Catalog | H | HIP | 75695 | Proxy | RAhms | 15 27 49.85 | |||||
DEdms | +29 06 19.8 | Vmag | 3.66 | VarFlag | 1 | R Vmag | H | ||||
RAdeg | 231.958 | DEdeg | 29.1055 | AstroRef | + | Plx | 28.6 | ||||
CCDM | 15278+2906 | N CCDM | I | Nsys | 1 | Ncomp | 1 | ||||
MultFlag | O | Source | Qual | M HIP | |||||||
Theta | Rho | HD | 137909 | BD | BD+29 2670 | ||||||
CD | CP | Dm number | +29 2670 | VIred | 0.35 | ||||||
SpType | F0p | R SpType | Coord arcsec 2000 | 152749.85+290619.8 |
HIP | 75695 | Sn | 75 | So | 4 | Nc | 1 | ||||
RArad | 4.0484258681 | DErad | 0.5079866628 | Plx | 29.17 | PmRA | -180.17 | ||||
PmDE | 85.92 | E RArad | 0.38 | E DErad | 0.51 | E Plx | 0.76 | ||||
E pmRA | 0.4 | E pmDE | 0.64 | Hpmag | 3.7373 | E Hpmag | 0.0006 | ||||
SHp | 0.007 | VA | 1 | BV | 0.319 | E BV | 0.002 | ||||
VI | 0.37 |
Ccdm | 15278+2906 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | 1.74 | DDEs | 20.5 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 2 | Vmag | 3.7 | Sp | F0 | PmNote | * | ||||
PmRA | -180 | PmDE | 83 | Dm number | +29 2670 | Cat1 | BD | ||||
Name2 | +29 1493 | Cat2 | AGK2/3 | HD | 137909 | M HD | |||||
ADS BDS | M ADS BDS | N IDS | IDS | 15237N2927A | |||||||
HIC | 75695 |
Componente originario normalizzato | AB | Coord arcsec 2000 | 152749.86+290619.6 | Mag | 5.2 | Spectral class | F2 (yellow-white) | ||||
Calc delta mag | 1.52 | Calc coord | yes |
Ccdm | 15278+2906 | RComp | Comp | B | Note1 | ||||||
Note2 | Discov num | JEF | DRAs | DDEs | |||||||
R dRAs | Year | 1945 | Theta | 079 | Rho | 0.1 | |||||
Obs | 1 | Vmag | Sp | PmNote | |||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | M ADS BDS | N | N IDS | IDS | 15237N2927B | ||||||
HIC | 75695 |