Coord 2000 | 13239+5456 | Discov num | SHY 247 | Comp | AF | Coord arcsec 2000 | 13 23 55.42 +54 55 31.5 | ||||
Date first | 1991 | Date last | 1999 | Obs | 3 | ||||||
Pa first | 359 | Pa last | 358.6 | P.A. Now (θ) | 358.6° | ||||||
Sep first | 999.9 | Sep last | 9999.999 | Sep. Now (ρ) | 9999.999" | ||||||
Mag pri | 2.23 | Mag sec | 9.86 | delta mag (ΔM) | 7.63 | Spectral class | A2V+K5 (white/yellow-orange) | ||||
Pri motion ra | +121 | Sec motion ra | +119 | ||||||||
Pri motion dec | -022 | Sec motion dec | -020 | ||||||||
Notes | N V (See Notes, Proper motion indicates physical) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 28737 | 13 23 55 +54 55 32 | PEA 1 Aa,Ab | 2004 | 63 | 34 | 0.0 | 3.00 | 3.00 | 0.00 | Y | ||
Show | Mizar | 28737 | 13 23 55 +54 55 32 | STF 1744 AB | 2020 | 500 | 154 | 14.7 | 2.23 | 3.88 | 1.65 | ||
Show | 28737 | 13 23 55 +54 55 32 | STF 1744 AC | 2020 | 15 | 73 | 715.5 | 2.23 | 4.01 | 1.78 | |||
Show | 28737 | 13 23 55 +54 55 32 | SMR 4 AD | 2020 | 11 | 103 | 498.1 | 2.23 | 7.62 | 5.39 | |||
Show | 28737 | 13 23 55 +54 55 32 | SHY 247 AE | 1999 | 3 | 321 | 999.9 | 2.23 | 6.88 | 4.65 | |||
Show | 28737 | 13 23 55 +54 55 32 | SHY 247 AF | 1999 | 3 | 359 | 999.9 | 2.23 | 9.86 | 7.63 | <=== | ||
Show | Alcor | 28751 | 13 25 14 +54 59 17 | PSF 1 Ca,Cb | 2009 | 5 | 207 | 1.0 | 4.01 | 8.00 | 3.99 | ||
Show | Alcor | 28751 | 13 25 14 +54 59 17 | SHY 248 CE | 1999 | 3 | 317 | 999.9 | 4.01 | 6.88 | 2.87 | ||
Show | Alcor | 28751 | 13 25 14 +54 59 17 | SHY 248 CF | 1999 | 3 | 355 | 999.9 | 4.01 | 9.86 | 5.85 | ||
Show | Alcor | 28751 | 13 25 14 +54 59 17 | SHY 248 CG | 1999 | 3 | 271 | 999.9 | 4.01 | 8.21 | 4.20 | ||
Show | Alcor | 28751 | 13 25 14 +54 59 17 | SHY 248 CH | 1999 | 3 | 243 | 999.9 | 4.01 | 8.63 | 4.62 |
Common name | Mizar | Var name | NSV6224 UMa | Constellation | Ursa Major | SAO | 28737 | ||||
HIP | 65378 | Tycho2 | 3850-01385-1 | Gaia DR2 | 1563590579345330944 | HD | 116656 | ||||
HR | 5054 | GC | 18133 | ADS | 8891 | GL | NN 3783A | ||||
BD | BD+55 1598 | Bayer | Zeta Ursae Majoris | Bayer name | Zet UMa | Flamsteed | 79 Ursae Majoris | ||||
Flamsteed name | 79 UMa | FK5 | 497 | Distance | 26.31 | Distance ly | 85.82 | ||||
Bayer greek | ζ UMa |
Other names | Mizat, Mirza, Mitsar |
Meaning | bandage (thong) |
discov_num | notes | refcode |
STF1744 | A is zet UMa = Mizar. B is 80 UMa = Alcor. | |
Split by Benedetto Castelli. After resolving AD in | C__1616 | |
1617 he wrote to his friend, Galileo, to observe the pair, "It's one of | C__1617 | |
the beautiful things in the sky and I don't believe that in our pursuit | ||
one could desire better." Galileo measured it in early 1617. See the | G__1617 | |
excellent discussion of its discovery in Leos Ondra's July 2004 Sky & | ||
Telescope article, from which Galileo's measure was extracted. It was | ||
independently found double in 1650 by Jean Baptiste Riccioli in | Ric1651 | |
Bologna: "There appears to be one star in the middle of the Great | ||
Bear's tail, where there are actually two, as the telescope reveals." | ||
This was also the first to be observed photographically, by John A. | ||
Whipple with the Harvard 15inch on 27 April 1857. According to Aitken, | ||
this was the first observed photographically (G.P. Bond at Harvard | A__1935f | |
College Observatory in 1857 using an 8 second exposure on a collodion | BdG1858 | |
plate), and the first spectroscopic binary discovered (E.C. Pickering | Pck1890 | |
in 1889). A is a spectroscopic binary, P = 20.54d (first orbit 1901). | Vog1901 | |
B is also a spectroscopic binary (first orbits 1908), P = 175.6d, | XXX1908a | |
spectrum A1m or A1/A2/A7. Also, common proper motion with 80 UMa | XXX1908b | |
80 UMa (Alcor) and other members of the Ursa Major stream. | ||
AC: SHY 247. Bayesian analysis by Shaya & Olling (2011) indicates very | Shy2011 | |
high (near 100%) probability pair is physical. | ||
PEA 1 | Mistakenly given the discoverer designation 'MKT 8' in the WDS, | Pea1925 |
but actually first resolved by Pease in 1925, six decades before the | ||
Mark III interferometer measures. This system has completed some 1,350 | ||
revolutions since its first resolution, probably a record for any | ||
"visual" binary. | ||
The orbit of Aa,Ab by Russell (1927) is combined interferometric/ | Rus1927 | |
spectroscopic (double-lined spectrum). A small magnitude difference | ||
(which would probably place the ascending node in the second quadrant) | ||
is uncertain. | ||
Star B (mag. 3.96, 15") is physical, and is itself a 175.55d SB1. | ||
Visual orbit by Hummel et al. (1995) is based on astrometry from the | MkT1995 | |
Mark III interferometer. Additional spectroscopic data yield component | ||
masses, luminosities, radii, effective temperatures, and distance. | ||
See Baize & Petit (1989) catalog of doubles with variable component. | Baz1989d | |
Pourbaix gives combined solution for this resolved SB2, yielding | ||
orbital parallaxes and component masses. | Pbx2000b | |
SMR 4 | AD: This was the first component of Mizar split by Benedetto Castelli | C__1616 |
in late 1616. It was called "Sidus Ludoviciana" (Ludwig's Star) by | XXX2004 | |
Johann Georg Liebnecht for the Landgrave Ludwig of Hessen-Darmstadt | ||
who thought he has discovered a planet. He was wrong. | ||
SHY 247 | AE: HIP 65378 + HIP 64532. E component = A component of 13136+5643 | |
= C component of 12487+6019. | ||
SHY 247 | AF: HIP 65378 + HIP 65327. F component = D component of 12417+5543. | |
SHY 248 | CE: HIP 65477 + HIP 64532. | |
SHY 248 | CF: HIP 65477 + HIP 65327. | |
SHY 248 | CG: HIP 65477 + HIP 61100. G component = G component of 13136+5643. | |
SHY 248 | CH: HIP 65477 + HIP 61481. | |
STF1744 | AB: H 3 2. | MEv2010 |
refcode | metd | author | reference |
A__1935f | - | Aitken, R.G. | 1935QB821.A3....... |
A__1935f | The Binary Stars, 1935 | ||
Baz1989d | - | Baize, P. & Petit, M. | 1989A&AS...77..497B |
Baz1989d | A&AS 77, 497, 1989 | ||
C__1616 | V - | Castelli, B. | 2004S&T...108a..72O |
C__1616 | (as cited by Ondra, L., S&T, July 2004, p 72) | ||
C__1616 | (see also: http://www.leosondra.cz/en/mizar/) | ||
C__1617 | not - | Castelli, B. | 2004S&T...108a..72O |
C__1617 | +V | (as cited by Ondra, L., S&T, July 2004, p 72) | |
C__1617 | (see also: http://www.leosondra.cz/en/mizar/) | ||
G__1617 | V - | Galileo Galilei | 2004S&T...108a..72O |
G__1617 | +not | Galilo manuscript 70 c, 10r, Biblioteca Nazionale Centrale, Florence, p 74 | |
G__1617 | (also see Ond2004) | ||
MEv2010 | - | MacEvoy, B. | ................... |
MEv2010 | private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) | ||
MkT1995 | Km j | Hummel, C.A., Armstrong, J.T., Buscher, D.F., Mozurkewich, D., Quirrenbach, A., & | 1995AJ....110..376H |
MkT1995 | +orb | Vivekanand, M. | |
MkT1995 | AJ 110, 376, 1995 | ||
Pbx2000b | orb - | Pourbaix, D. | 2000A&AS..145..215P |
Pbx2000b | A&AS 145, 215, 2000 | ||
Pck1890 | not - | Pickering, E. | 1890SidM....9...80P |
Pck1890 | Siderial Messenger 9, 80, 1890 | ||
Pea1925 | Jp j | Pease, F.G. | 1925PASP...37..155P |
Pea1925 | PASP 37, 155, 1925 | ||
Ric1651 | V - | Riccoli, G.B. | 2004S&T...108a..72O |
Ric1651 | +not | (as cited by Ondra, L., S&T, July 2004, p 72) | |
Ric1651 | also see : http://www.leosondra.cz/en/mizar/riccioli/ | ||
Rus1927 | orb - | Russell, H.N. | 1927PASP...39..313R |
Rus1927 | PASP 39, 313, 1927 | ||
Shy2011 | - | Shaya, E.J. & Olling, R. | 2011ApJS..192....2S |
Shy2011 | ApJS 192, 2, 2011 | ||
Shy2011 | (Statistical analysis of probability that wide Hipparcos pairs are physical. Pairs | ||
Shy2011 | added to WDS only if probability 90% or greater.) | ||
Vog1901 | not - | Vogel, H.C. | 1901ApJ....13..324V |
Vog1901 | ApJ 13, 324, 1890 | ||
XXX1908a | not - | Frost, E.B. | 1908AN....177..171F |
XXX1908a | AN 177, 171, 1908 | ||
XXX1908b | not - | Ludendorff, H. | 1908AN....177....7L |
XXX1908b | AN 177, 7, 1908 | ||
XXX2004 | not - | Ondra, L. | 2004S&T...108a..72O |
XXX2004 | S&T, July 2004, p 72) | ||
XXX2004 | also see : http://www.leosondra.cz/en/mizar/riccioli/ |
idgroup | discov | author |
1 | PSF | Project Sixteen Forty - see Zmm2010 |
1 | SMR | Schlimmer, J. |
56 | STF | Struve, F.G.W. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
13239+5456 | SHY 247 | AF | 1999 | 3 | 359 | 999.9 | 2.23 | 9.86 | A2V K5 | NVD | 132355.42+545531.5 |
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 | Ab | B | C | Cb | D | E | F | G | |
Ab | pa=21.0° sep=0.01" | ||||||||
B | pa=164.2° sep=13.75" | pa=164.2° sep=13.75" | |||||||
C | pa=71.5° sep=709.42" | pa=71.5° sep=709.41" | pa=70.4° sep=710.23" | ||||||
Cb | pa=71.6° sep=708.86" | pa=71.6° sep=708.86" | pa=70.5° sep=709.66" | pa=196.4° sep=0.97" | |||||
D | pa=112.2° sep=301.06" | pa=112.2° sep=301.06" | pa=110.1° sep=292.81" | pa=229.3° sep=520.02" | pa=229.4° sep=519.21" | ||||
E | pa=335.0° sep=7067.16" | pa=335.0° sep=7067.15" | pa=335.1° sep=7080.77" | pa=329.5° sep=7166.75" | pa=329.5° sep=7167.43" | pa=333.4° sep=7286.75" | |||
F | pa=359.2° sep=9997.93" | pa=359.2° sep=9997.92" | pa=359.2° sep=10011.21" | pa=355.2° sep=9803.33" | pa=355.2° sep=9804.23" | pa=357.6° sep=10118.83" | pa=37.4° sep=4464.42" | ||
G | pa=274.5° sep=5080.74" | pa=274.5° sep=5080.74" | pa=274.6° sep=5085.75" | pa=271.7° sep=5735.43" | pa=271.8° sep=5735.20" | pa=275.5° sep=5369.91" | pa=198.2° sep=6365.45" | pa=205.5° sep=10708.40" | |
H | pa=226.0° sep=6235.54" | pa=226.0° sep=6235.54" | pa=226.1° sep=6229.33" | pa=228.5° sep=6889.33" | pa=228.5° sep=6888.52" | pa=228.5° sep=6369.33" | pa=187.4° sep=10829.29" | pa=195.7° sep=14905.89" | pa=172.5° sep=4740.80" |
Common name | Mizar | Meaning | bandage (thong) | Other names | Mizat, Mirza, Mitsar | Coord arcsec 2000 | 132355.42+545531.5 | ||||
Mag | 2.23 | Spectral class | A1VpSrSi (white) | PmRA | 121.00 | PmDE | -22.0 | ||||
SAO | 28737 | HIP | 65378 | Tycho2 | 3850-01385-1 | HD | 116656 | ||||
HR | 5054 | GC | 18133 | BD | BD+55 1598 | Bayer | Zeta Ursae Majoris | ||||
Bayer name | Zet UMa | Flamsteed | 79 Ursae Majoris | Flamsteed name | 79 UMa | FK5 | 497 |
SAO | 28737 | DelFlag | RA1950 | PmRA1950 | 0.0139 | ||||||
DE1950 | PmDE1950 | -0.025 | Vmag | 2.4 | SpType | A2p | |||||
Double code | Source | 74 | CatNum | 497 | DM | BD+55 1598 | |||||
DMcomp | A | BDsup | HD | 116656 | M HD | 0 | |||||
GC | 18133 | RA1950rad | 3.4990154 | DE1950rad | 0.96317673 | PmRA2000 | 0.0142 | ||||
PmDE2000 | -0.02 |
Catalog | H | HIP | 65378 | Proxy | RAhms | 13 23 55.42 | |||||
DEdms | +54 55 31.5 | Vmag | 2.23 | VarFlag | R Vmag | H | |||||
RAdeg | 200.981 | DEdeg | 54.9254 | AstroRef | A | Plx | 41.73 | ||||
CCDM | 13240+5456 | N CCDM | I | Nsys | 2 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AC | |||||
Theta | 152 | Rho | 14.431 | HD | 116656 | BD | BD+55 1598 | ||||
CD | CP | Dm number | +55 1598 | VIred | 0.07 | ||||||
SpType | A2V | R SpType | Coord arcsec 2000 | 132355.42+545531.5 |
HIP | 65378 | Sn | 15 | So | 3 | Nc | 2 | ||||
RArad | 3.5077787053 | DErad | 0.9586293363 | Plx | 38.01 | PmRA | 119.01 | ||||
PmDE | -25.97 | E RArad | 1.28 | E DErad | 1.4 | E Plx | 1.71 | ||||
E pmRA | 1.49 | E pmDE | 1.65 | Hpmag | 2.254 | E Hpmag | 0.0088 | ||||
SHp | 0.041 | VA | 0 | BV | 0.057 | E BV | 0.004 | ||||
VI | 0.07 |
Coord arcsec 2000 | 132355.42+545531.5 | Mag | 3 | Calc coord | yes |
Coord arcsec 2000 | 132355.85+545518.3 | Mag | 3.88 | PmRA | 121.00 | PmDE | -22.0 | ||||
Calc delta mag | 0.88 | Calc coord | yes |
Common name | Alcor | Meaning | the faint one | Other name | g UMa | Coord arcsec 2000 | 132513.53+545916.6 | ||||
Coord calc | 132513.53+545916.6 | Mag | 4.01 | Spectral class | A5V (white) | PmRA | 119.00 | ||||
PmDE | -18.0 | SAO | 28751 | HIP | 65477 | Tycho2 | 3850-01384-1 | ||||
HD | 116842 | HR | 5062 | GC | 18155 | BD | BD+55 1603 | ||||
Flamsteed | 80 Ursae Majoris | Flamsteed name | 80 UMa | Calc delta mag | 1.01 |
Tycho2 | 3850-01384-1 | Pflag | RAmdeg | 201.30640150 | DEmdeg | 54.98795585 | |||||
PmRA | 119.0 | PmDE | -18.3 | E RAmdeg | 3 | E DEmdeg | 3 | ||||
E pmRA | 1.0 | E pmDE | 1.0 | EpRAm | 1991.57 | EpDEm | 1991.55 | ||||
Num | 10 | Q RAmdeg | 0.3 | Q DEmdeg | 1.0 | Q pmRA | 0.4 | ||||
Q pmDE | 0.9 | BTmag | 4.203 | E BTmag | 0.014 | VTmag | 4.007 | ||||
E VTmag | 0.009 | Prox | 999 | TYC | T | HIP | 65477 | ||||
CCDM | RAdeg | 201.30592361 | DEdeg | 54.98799833 | EpRA 1990 | 1.71 | |||||
EpDE 1990 | 1.68 | E RAdeg | 3.2 | E DEdeg | 3.2 | Posflg | |||||
Corr | -0.2 |
SAO | 28751 | DelFlag | RA1950 | PmRA1950 | 0.0134 | ||||||
DE1950 | PmDE1950 | -0.021 | Vmag | 4 | SpType | A5 | |||||
Double code | Source | 70 | CatNum | 18155 | DM | BD+55 1603 | |||||
DMcomp | BDsup | HD | 116842 | M HD | 0 | ||||||
GC | 18155 | RA1950rad | 3.50472857 | DE1950rad | 0.96426041 | PmRA2000 | 0.0138 | ||||
PmDE2000 | -0.016 |
Catalog | H | HIP | 65477 | Proxy | RAhms | 13 25 13.42 | |||||
DEdms | +54 59 16.8 | Vmag | 3.99 | VarFlag | 1 | R Vmag | H | ||||
RAdeg | 201.306 | DEdeg | 54.988 | AstroRef | Plx | 40.19 | |||||
CCDM | 13240+5456 | N CCDM | I | Nsys | 2 | Ncomp | 1 | ||||
MultFlag | Source | Qual | M HIP | ||||||||
Theta | Rho | HD | 116842 | BD | BD+55 1603 | ||||||
CD | CP | Dm number | +55 1603 | VIred | 0.19 | ||||||
SpType | A5V SB | R SpType | Coord arcsec 2000 | 132513.42+545916.8 |
HIP | 65477 | Sn | 5 | So | 0 | Nc | 1 | ||||
RArad | 3.5134507307 | DErad | 0.9597216255 | Plx | 39.91 | PmRA | 120.21 | ||||
PmDE | -16.04 | E RArad | 0.11 | E DErad | 0.11 | E Plx | 0.13 | ||||
E pmRA | 0.12 | E pmDE | 0.14 | Hpmag | 4.0506 | E Hpmag | 0.0008 | ||||
SHp | 0.008 | VA | 2 | BV | 0.169 | E BV | 0.006 | ||||
VI | 0.19 |
Coord arcsec 2000 | 132513.50+545915.7 | Mag | 8 | Calc delta mag | 5 | Calc coord | yes |
Coord arcsec 2000 | 132427.75+545337.8 | Mag | 7.62 | PmRA | -20.00 | PmDE | -5.0 | ||||
Calc delta mag | 4.62 | Calc coord | yes |
Coord arcsec 2000 | 131808.13+564244.6 | Mag | 6.88 | Spectral class | G1Va (yellow) | PmRA | 113.00 | ||||
PmDE | -20.0 | Calc delta mag | 3.88 | Calc coord | yes |
Coord arcsec 2000 | 132339.13+574208.5 | Mag | 9.86 | Spectral class | K5 (yellow-orange) | PmRA | 119.00 | ||||
PmDE | -20.0 | Calc delta mag | 6.86 | Calc coord | yes |
Coord arcsec 2000 | 131406.96+550211.1 | Mag | 8.21 | Spectral class | K2V (yellow-orange) | PmRA | 108.00 | ||||
PmDE | -1.0 | Calc delta mag | 5.21 | Calc coord | yes |
Coord arcsec 2000 | 131519.00+534352.3 | Mag | 8.63 | Spectral class | K0V (yellow-orange) | PmRA | 109.00 | ||||
PmDE | -5.0 | Calc delta mag | 5.63 | Calc coord | yes |