Coord 2000 | 11037+6145 | Discov num | BU 1077 | Comp | AB | Coord arcsec 2000 | 11 03 43.84 +61 45 04.0 | ||||
Date first | 1889 | Date last | 2017 | Obs | 83 | ||||||
Pa first | 326 | Pa last | 342.3 | P.A. Now (θ) | 323.2° | ||||||
Sep first | 0.9 | Sep last | 0.806 | Sep. Now (ρ) | 0.819" | ||||||
Mag pri | 2.02 | Mag sec | 4.95 | delta mag (ΔM) | 2.93 | Spectral class | G9III (yellow) | ||||
Pri motion ra | -119 | Sec motion ra | |||||||||
Pri motion dec | -067 | Sec motion dec | |||||||||
Notes | N O (See Notes, Orbital solution) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | Dubhe | 15384 | 11 03 44 +61 45 04 | BU 1077 AB | 2017 | 83 | 342 | 0.8 | 2.02 | 4.95 | 2.93 | Y | <=== |
Show | 15384 | 11 03 44 +61 45 04 | BU 1077 AC | 2020 | 15 | 206 | 384.5 | 2.02 | 7.19 | 5.17 |
Common name | Dubhe | Var name | NSV5070 UMa | Constellation | Ursa Major | SAO | 15384 | ||||
HIP | 54061 | Tycho2 | 4146-01274-1 | HD | 95689 | HR | 4301 | ||||
GC | 15185 | ADS | 8035 | BD | BD+62 1161 | Bayer | Alpha Ursae Majoris | ||||
Bayer name | Alp UMa | Flamsteed | 50 Ursae Majoris | Flamsteed name | 50 UMa | FK5 | 417 | ||||
Distance | 37.68 | Distance ly | 122.91 | Bayer greek | α UMa |
Other names | DUBB, AK |
Meaning | Bear |
Period (P) | 44.448y | ± 0.11 | Periastron (T) | 2002.17y | ± 0.094 | Semi-major axis (a) | 0.59a | ± 0.026 |
Eccentricity (e) | 0.4392 | ± 0.004 | Inclination (i) | 159.9° | ± 3.5 | Longitude of periastron (ω) | 232.8° | ± 7.9 |
Node (Ω) | 9.3° | ± 8.2 | Notes | n | Reference | Sca2011a | ||
Equinox | 2000 | Last observation | 2010 | Grade | 2 | (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 |
BU 1077 | alp UMa = 50 UMa = Dubhe. | |
Soderhjelm (1999) orbit has low incl. fixed at 180 deg; observations | Sod1999 | |
are lacking near periastron. Pair has a giant primary according to | ||
isochrone fit. | ||
Faint, distant pair at 385", 7.60V. Possible common proper motion | ||
with the SB HD 95638 at 280". | ||
See Baize & Petit (1989) catalog of doubles with variable component. | Baz1989d | |
photocentric (astrometric) orbit based on combination of ground- | Gon2002a | |
based catalogs with Hipparcos. | ||
Companion could not be seen any more the following years. | VBs1954 | |
Mk III Limb-darkened diameter 7.6 +/- 0.4 mas. | MkT1988 | |
Mk III Limb-darkened diameter 7.11 +/- 0.10 mas. | MkT2001 | |
Mk III Limb-darkened diameter 6.739 +/- 0.099 mas. | MkT2003 | |
NPOI Limb-darkened diameter 6.91 +/- 0.08 mas. | NOI2001b | |
NPOI Limb-darkened diameter 6.419 +/- 0.041 mas, Sp = G9III, | NOI2018 | |
R =17.03 +/- 0.13 \rsun, Teff = 5012 +/- 65 K, L = 165.1 +/- 8.3 \lsun, | ||
M = 3.44 +/- 0.11 \msun, Age = 0.28 +/- 0.03 Gyr. | ||
AB: Malkov et al. (2012) derive dynamical and spectroscopic masses | ||
5.56 +/- 0.80 and 2.75 Msun, respectively. | Mlk2012 | |
Spectroscopic orbital elements have been determined. | XXX2018e |
refcode | metd | author | reference |
Baz1989d | - | Baize, P. & Petit, M. | 1989A&AS...77..497B |
Baz1989d | A&AS 77, 497, 1989 | ||
Gon2002a | orb - | Gontcharov, G.A. & Kiyaeva, O.V. | 2002SvAL...28..261G |
Gon2002a | SvAL 28, 261, 2002 | ||
MkT1988 | not j | Shao, M., Colavita, M.M., Hines, B.E., Staelin, D.H., Hutter, D.J., Johnston, K.J., | 1988ApJ...327..905S |
MkT1988 | Mozurkewich, D., Simon, R.S., Hershey, J.L., Hughes, J.A. & Kaplan, G.H. | . | |
MkT1988 | ApJ 327, 905, 1988 | . | |
MkT2001 | not j | Nordgren, T.E., Sudol, J.J. & Mozurkewich, D. | 2001AJ....122.2707N |
MkT2001 | AJ 122, 2707, 2001 | . | |
MkT2003 | Km - | Mozurkewich, D., Armstrong, J.T., Hindsley, R., Quirrenbach, A., Hummel, C.A., | 2003AJ....126.2502M |
MkT2003 | +not | Hutter, D., Johnston, K.J., Hajian, A., Elias, N.M., II, Buscher, D., & Simon, R. | |
MkT2003 | AJ 126, 2502, 2003 | ||
Mlk2012 | not - | Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. | 2012A&A...546A..69M |
Mlk2012 | A&A 546, A69, 2012 | ||
NOI2001b | not j | Nordgren, T.E., Sudol, J.J. & Mozurkewich, D. | 2001AJ....122.2707N |
NOI2001b | AJ 122, 2707, 2001 | . | |
NOI2018 | not j | Baines, E.K., Armstrong, J.T., Schmitt, H.R., Zavala, R.T., Benson, J.A., Hutter, | 2018AJ....155...30B |
NOI2018 | D.J., Tycner, C. & van Belle, G.T. | ||
NOI2018 | AJ 155, 30, 2018 | ||
Sca2011a | S j | Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., & Sala, M. | 2011AN....332..508S |
Sca2011a | +orb | AN 332, 508, 2011 | |
Sod1999 | orb - | Soderhjelm, S. | 1999A&A...341..121S |
Sod1999 | A&A 341, 121, 1999 | ||
VBs1954 | Ma - | Van Biesbroeck, G. | 1954PYerO...8....6V |
VBs1954 | +Mb | Pub. Yerkes Obs. 8, pt. 6, 1954 | |
VBs1954 | +orb | ||
XXX2018e | not - | Gray, D.F. | 2018ApJ...869...81G |
XXX2018e | ApJ 869, 81, 2018 | ||
XXX2018e | not - | Gray, D.F. | 2018ApJ...869...81G |
XXX2018e | ApJ 869, 81, 2018 |
idgroup | discov | author |
1 | BU | Burnham, S.W. (BU 1 - 81) |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
11037+6145 | BU 1077 | AB | 2006 | 65 | 57 | 0.4 | 2.02 | 4.95 | G9III | NOD | 110343.84+614504.0 |
11037+6145 | BU 1077 | AB | 2007 | 66 | 44 | 0.5 | 2.02 | 4.95 | G9III | NOD | 110343.84+614504.0 |
11037+6145 | BU 1077 | AB | 2009 | 69 | 26 | 0.6 | 2.02 | 4.95 | G9III | NOD | 110343.84+614504.0 |
11037+6145 | BU 1077 | AB | 2010 | 73 | 18 | 0.6 | 2.02 | 4.95 | G9III | NOD | 110343.84+614504.0 |
11037+6145 | BU 1077 | AB | 2011 | 75 | 10 | 0.6 | 2.02 | 4.95 | G9III | NOD | 110343.84+614504.0 |
11037+6145 | BU 1077 | AB | 2012 | 76 | 5 | 0.7 | 2.02 | 4.95 | G9III | NOD | 110343.84+614504.0 |
11037+6145 | BU 1077 | AB | 2013 | 78 | 0 | 0.7 | 2.02 | 4.95 | G9III | NOD | 110343.84+614504.0 |
11037+6145 | BU 1077 | AB | 2014 | 79 | 355 | 0.7 | 2.02 | 4.95 | G9III | NO | 110343.84+614504.0 |
11037+6145 | BU 1077 | AB | 2017 | 81 | 342 | 0.8 | 2.02 | 4.95 | G9III | NO | 110343.84+614504.0 |
Show | date ⇓ | username | difficulty | separation | pa_estim | interest | notes |
Show | 19/07/12 | shavarsh | easy | separated | very interesting | The main star was visibly large versus described yellow. |
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 | |
B | pa=351.4° sep=0.78" | |
C | pa=192.8° sep=355.37" | pa=192.8° sep=356.10" |
Common name | Dubhe | Meaning | Bear | Other names | DUBB, AK | Coord arcsec 2000 | 110343.84+614504.0 | ||||
Mag | 2.02 | Spectral class | G9III (yellow) | PmRA | -119.00 | PmDE | -67.0 | ||||
SAO | 15384 | HIP | 54061 | Tycho2 | 4146-01274-1 | HD | 95689 | ||||
HR | 4301 | GC | 15185 | BD | BD+62 1161 | Bayer | Alpha Ursae Majoris | ||||
Bayer name | Alp UMa | Flamsteed | 50 Ursae Majoris | Flamsteed name | 50 UMa | FK5 | 417 |
SAO | 15384 | DelFlag | RA1950 | PmRA1950 | -0.0168 | ||||||
DE1950 | PmDE1950 | -0.071 | Vmag | 2 | SpType | K0 | |||||
Double code | Source | 74 | CatNum | 417 | DM | BD+62 1161 | |||||
DMcomp | BDsup | HD | 95689 | M HD | 0 | ||||||
GC | 15185 | RA1950rad | 2.88267091 | DE1950rad | 1.08247647 | PmRA2000 | -0.0164 | ||||
PmDE2000 | -0.067 |
Catalog | H | HIP | 54061 | Proxy | H | RAhms | 11 03 43.84 | ||||
DEdms | +61 45 04.0 | Vmag | 1.81 | VarFlag | R Vmag | H | |||||
RAdeg | 165.933 | DEdeg | 61.7511 | AstroRef | A | Plx | 26.38 | ||||
CCDM | 11037+6145 | N CCDM | I | Nsys | 1 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AB | |||||
Theta | 270 | Rho | 0.672 | HD | 95689 | BD | BD+62 1161 | ||||
CD | CP | Dm number | +62 1161 | VIred | 1.04 | ||||||
SpType | F7V comp | R SpType | Coord arcsec 2000 | 110343.84+614504.0 |
HIP | 54061 | Sn | 17 | So | 3 | Nc | 2 | ||||
RArad | 2.8960711378 | DErad | 1.0777603439 | Plx | 26.54 | PmRA | -134.11 | ||||
PmDE | -34.7 | E RArad | 0.28 | E DErad | 0.31 | E Plx | 0.48 | ||||
E pmRA | 0.35 | E pmDE | 0.39 | Hpmag | 1.9519 | E Hpmag | 0.0004 | ||||
SHp | 0.005 | VA | 0 | BV | 1.061 | E BV | 0.003 | ||||
VI | 1.03 |
Ccdm | 11037+6145 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | 1.68 | DDEs | 3.1 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 2 | Vmag | 2.0 | Sp | K0 | PmNote | * | ||||
PmRA | -117 | PmDE | -71 | Dm number | +62 1161 | Cat1 | BD | ||||
Name2 | +62 691 | Cat2 | AGK2/3 | HD | 95689 | M HD | |||||
ADS BDS | A 8035 | M ADS BDS | N IDS | IDS | 10576N6217A | ||||||
HIC | 54061 |
Coord arcsec 2000 | 110343.82+614504.8 | Mag | 4.95 | Calc delta mag | 2.93 | Calc coord | yes |
Ccdm | 11037+6145 | RComp | Comp | B | Note1 | * | |||||
Note2 | Discov num | BU 1077 | DRAs | DDEs | |||||||
R dRAs | Year | 1889 | Theta | Rho | |||||||
Obs | 99 | Vmag | 4.8 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 8035 | M ADS BDS | N | N IDS | IDS | 10576N6217B | |||||
HIC | 54061 |
Coord arcsec 2000 | 110332.72+613917.5 | Mag | 7.19 | PmRA | -117.00 | PmDE | -66.0 | ||||
Calc delta mag | 5.17 | Calc coord | yes |