| 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) | 309.3° (calc) | ||||||
| Sep first | 0.9 | Sep last | 0.806 | Sep. Now (ρ) | 0.832" (calc) | ||||||
| Mag pri | 2.02 | Mag sec | 4.95 | delta mag (ΔM) | 2.93 | Spectral class | G9III+A7 (yellow/white) | ||||
| 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) | 44.199y | ± 0.278 | Periastron (T) | 1913.888y | ± 0.554 | Semi-major axis (a) | 0.593a | ± 0.004 |
| Eccentricity (e) | 0.433 | ± 0.004 | Inclination (i) | 167.155° | ± 2.249 | Longitude of periastron (ω) | 51.525° | ± 9.59 |
| Node (Ω) | 185.901° | ± 9.25 | Notes | n | Reference | JAA2023 | ||
| Equinox | Last observation | Grade | 2 | (1=Definitive, 9=Indet.) |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. ![]() Measures: green=micrometric, blue=interferometric, purple=photographic |
|
| 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 | ||
| JAA2023 | orb - | Anguita-Aguero, J., Mendez, R.A., Videla, M., Costa, E., Vanzi, L., | 2023AJ....166..172A |
| JAA2023 | Castro-Morales, N., & Caballero-Valdes, C. | ||
| JAA2023 | AJ 166, 172, 2023 | ||
| 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 | |||
| NOI2018 | AJ 155, 30, 2018 | ||
| 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 | |||
| XXX2018e | not - | Gray, D.F. | 2018ApJ...869...81G |
| XXX2018e |
| discov | author |
| BAZ | Baize, P. |
| JAA | Anguita-Aguero, J., Mendez, R.A., Videla, M., Costa, E., Vanzi, L., |
| JAA | Castro-Morales, N., & Caballero-Valdes, C. |
| MKT | Shao, M., Colavita, M.M., Hines, B.E., Staelin, D.H., Hutter, D.J., Johnston, K.J., |
| MKT | Mozurkewich, D., Simon, R.S., Hershey, J.L., Hughes, J.A. & Kaplan, G.H. |
| MKT | Hutter, D.J., Johnston, K.J., Mozurkewich, D., Simon, R.S., Colavita, M.M., Pan, |
| MKT | X.P., Shao, M., Hines, B.E., Staelin, D.H., Hershey, J.L., Hughes, J.A. & Kaplan, |
| MKT | G.H. |
| MKT | Mozurkewich, D., Johnston, K.J., Simon, R.S., Bowers, P.F., Gaume, R., Hutter, |
| MKT | D.J., Colavita, M.M., Shao, M. & Pan, X.P. |
| MKT | Pan, X.P., Shao, M., Colavita, M.M., Armstrong, J.T., Mozurkewich, D., |
| MKT | Vivekanand, M., Denison, C.S., Simon, R.S., et al. |
| MKT | Armstrong, J.T., Mozurkewich, D., Vivekanand, M., Simon, R.S., Denison, C.S., |
| MKT | Johnston, K.J., Pan, X.-P., Shao, M., et al. |
| MKT | Armstrong, J.T., Hummel, C.A., Quirrenbach, A., Buscher, D.F., Mozurkewich, D., |
| MKT | Vivekanand, M., Simon, R.S., Denison, C.S., et al. |
| MKT | Hummel, C.A., Armstrong, J.T., Quirrenbach, A., Buscher, D.F., Mozurkewich, D., |
| MKT | Simon, R.S., & Johnston, K.J. |
| MKT | Hummel, C.A., Armstrong, J.T., Quirrenbach, A., Buscher, D.F., Mozurkewich, D., |
| MKT | Elias, N.M., & Wilson, R.E. |
| MKT | Mozurkewich, D., Armstrong, J.T., Hindsley, R., Quirrenbach, A., Hummel, C.A., |
| MKT | Hutter, D., Johnston, K.J., Hajian, A., Elias, N.M., II, Buscher, D., & Simon, R. |
| MKT | Armstrong, J.T., Mozurkewich, D., Hajian, A.R., Johnston, K.J., Thessin, R.N., |
| MKT | Peterson, D.M., Hummel, C.A., & Gilbreath, G.C. |
| NOI | Benson, J.A., Hutter, D.J., Elias, N.M., Bowers, P.F., Johnston, K.J., |
| NOI | Hajian, A.R., Armstrong, J.T., Mozurkewich, D., et al. |
| NOI | Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias, |
| NOI | II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S., |
| NOI | Armstrong, J.T., Pauls, T.A. & Rickard, L.J. |
| NOI | Armstrong, J.T., Nordgren, T.E., Germain, M.E., Hajian, A.R., Hindsley, R.B., |
| NOI | Hummel, C.A., Mozurkewich, D. & Thessin, R.N. |
| NOI | Armstrong, J.T., Mozurkewich, D., Hajian, A.R., Johnston, K.J., Thessin, R.N., |
| NOI | Peterson, D.M., Hummel, C.A., & Gilbreath, G.C. |
| NOI | Koubsky, P., Hummel, C.A., Harmanec, P., Tycner, C., van Leeuwen, F., Yang, S., |
| NOI | Slechta, M., Bozic, H., Zavala, R.T., Ruzdjak, D., & Sudar, D. |
| NOI | Che, X., Monnier, J.D., Tycner, C., Kraus, S., Zavala, R.T., Baron, F., Pedretti, |
| NOI | E., ten Brummelaar, T., McAlister, H., Ridgway, S.T., Sturmann, J., Sturmann, L., |
| NOI | & Turner, N. |
| NOI | Hutter, D.J., Zavala, R.T., Tycner, C., Benson, J.A., Hummel, C.A., Sanborn, J., |
| NOI | Franz, O.G., & Johnston, K.J. |
| NOI | Schaefer, G.H., Hummel, C.A., Gies, D.R., Zavala, R.T., Monnier, J.D., |
| NOI | Walter, F.M., Turner, N.H., Baron, F., ten Brummelaar, T., Che, X., |
| NOI | Farrington, C.D., Kraus, S., Sturmann, J., & Sturmann, L. |
| NOI | Baines, E.K., Armstrong, J.T., Schmitt, H.R., Zavala, R.T., Benson, J.A., Hutter, |
| NOI | AJ 155, 30, 2018 |
| NOI | Mason, B.D., Griffin, R.E.M., Zavala, R.T., Hummel, C.A., Hurowitz, H.M., Hurowitz, |
| SOD | Soderhjelm, S. & Mignard, F. |
| XXX | Ake, T.B., Fekel, F.C., Hall, D.S., Barksdale, W.S., Landis, H.J., Fried, R.E., |
| XXX | Louth, H. & Hopkins, J.L. |
| XXX | Grundahl, F., Andersen, M.F., Christensen-Dalsgaard, J., Antoci, V., Kjeldsen, H., |
| XXX | Handberg, R., Houdek, G., Bedding, T.R., Palle, P.L., Jessen-Hansen, J., Aguirre, |
| XXX | V.S., White, T.R., Frandsen, S., Albrecht, S., Andersen, M.I., Arentoft, T., |
| XXX | Brogaard, K., Chaplin, W.J., Harpsoe, K., Jorgensen, U.G., Karovicova, I., Karoff, |
| XXX | C., Rasmussen, P.K., Lund, M.N., Lundkvist, M.S., Skottfelt, J., Sorensen, A.N., |
| XXX | Tronsgaard, R. & Weiss, E. |
| XXX | White, T.R., Benomar, O., Silva Aguirre, V., Ball, W.H., Bedding, T.R., Chaplin, |
| XXX | W.J., Christensen-Dalsgaard, J., Garcia, R.A., Gizon, L., Stello, D., Aigrain, S., |
| XXX | Anita, H.M., Appourchaux, T., Bazot, M., Campante, T.L., Creevey, O.L., Davies, |
| XXX | G.R., Elsworth, Y.P., Gaulme, P., Handberg, R., Hekker, S., Houdek, G., Howe, R., |
| XXX | Huber, D., Karoff, C., Marques, J.P., Mathur, S., McQuillan, A., Metcalfe, T.S., |
| XXX | Mosser, B., Nielsen, M.B., Regulo, C., Salabert, D. & Stahn, T. |
| XXX | Mahy, L., Gosset, E., Manfroid, J., Nitschelm, C., Herve, A., Semaan, T., |
| XXX | Marcadon, F., Appourchaux, T. & Marques, J.P. |
| XXX | Koubsky, P., Harmanec, P., Broz, M., Kotkova, L., Yang, S., Bozic, H., Sudar, D., |
| XXX | Landstreet, J.D. & Bagnulo, S. |
| XXX | Zhou, Y., Apai, D., Bedin, L.R., Lew, B.W.P., Schneider, G., Burgasser, A.J., |
| XXX | Suffak, M.W., Jones, C.E., Tycner, C., Henry, G.W., Carciofi, A.C., Mota, B.C. & |
| XXX | Pope, B.J.S., Dedell, M., Callingham, J.R., Vedantham, H.K., Snellen, I.A.G., |
| XXX | Blunt, S., Wang, J.J., Angelo, I., Ngo, H., Cody, D., DeRosa, R.J., Graham, J.R., |
| XXX | Kain, I.J., Newton, E.R., Dittmann, J.A., Irwin, J.M., Mann, A.W., Thao, P.C., |
| XXX | Bazot, M. |
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | dm_number | notes | coord_arcsec_2000 |
| 11037+6145 | BU 1077 | AB | 2006 | 65 | 57 | 0.4 | 2.02 | 4.95 | G9III | +62 1161 | NOD | 110343.84+614504.0 |
| 11037+6145 | BU 1077 | AB | 2007 | 66 | 44 | 0.5 | 2.02 | 4.95 | G9III | +62 1161 | NOD | 110343.84+614504.0 |
| 11037+6145 | BU 1077 | AB | 2009 | 69 | 26 | 0.6 | 2.02 | 4.95 | G9III | +62 1161 | NOD | 110343.84+614504.0 |
| 11037+6145 | BU 1077 | AB | 2010 | 73 | 18 | 0.6 | 2.02 | 4.95 | G9III | +62 1161 | NOD | 110343.84+614504.0 |
| 11037+6145 | BU 1077 | AB | 2011 | 75 | 10 | 0.6 | 2.02 | 4.95 | G9III | +62 1161 | NOD | 110343.84+614504.0 |
| 11037+6145 | BU 1077 | AB | 2012 | 76 | 5 | 0.7 | 2.02 | 4.95 | G9III | +62 1161 | NOD | 110343.84+614504.0 |
| 11037+6145 | BU 1077 | AB | 2013 | 78 | 0 | 0.7 | 2.02 | 4.95 | G9III | +62 1161 | NOD | 110343.84+614504.0 |
| 11037+6145 | BU 1077 | AB | 2014 | 79 | 355 | 0.7 | 2.02 | 4.95 | G9III | +62 1161 | NO | 110343.84+614504.0 |
| 11037+6145 | BU 1077 | AB | 2017 | 81 | 342 | 0.8 | 2.02 | 4.95 | G9III | +62 1161 | 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=342.3° sep=0.81" | |
| C | pa=205.7° sep=384.62" | pa=205.6° sep=385.21" |
| 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 | ||||
| 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 |
| 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 | -136.46 | N CCDM | I | Nsys | 1 | Ncomp | 2 | ||||
| MultFlag | C | Source | Qual | A | M HIP | AB | |||||
| Theta | 270 | Rho | 0.672 | HD | 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 | 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 | 110343.81+614504.8 | Mag | 4.95 | Spectral class | A7 (white) | SAO | 179488 | ||||
| DM | CD-29 8822 | Delta magnitude | 2.93 | Coordinate calculated | yes |
| SAO | 179488 | DelFlag | RA1950 | PmRA1950 | 0.0052 | ||||||
| DE1950 | PmDE1950 | 0.058 | Vmag | 9.3 | SpType | K0 | |||||
| Double code | Source | 24 | CatNum | 7291 | DM | CD-29 8822 | |||||
| DMcomp | BDsup | HD | M HD | ||||||||
| GC | RA1950rad | 2.88548904 | DE1950rad | -0.51350541 | PmRA2000 | 0.0054 | |||||
| PmDE2000 | 0.062 |
| 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 | 110320.35+613917.5 | Mag | 7.19 | PmRA | -117.00 | PmDE | -66.0 | ||||
| Tycho2 | 4146-00354-1 | HD | 95638 | Delta magnitude | 5.17 | Coordinate calculated | yes |
| Tycho2 | 4146-00354-1 | Pflag | RAmdeg | 165.84106109 | DEmdeg | 61.65426566 | |||||
| PmRA | -117.4 | PmDE | -65.6 | E RAmdeg | 4 | E DEmdeg | 4 | ||||
| E pmRA | 0.9 | E pmDE | 1.0 | EpRAm | 1991.26 | EpDEm | 1991.39 | ||||
| Num | 18 | Q RAmdeg | 1.2 | Q DEmdeg | 0.8 | Q pmRA | 1.2 | ||||
| Q pmDE | 0.8 | BTmag | 7.744 | E BTmag | 0.015 | VTmag | 7.194 | ||||
| E VTmag | 0.010 | Prox | 999 | TYC | T | HIP | |||||
| CCDM | RAdeg | 165.84163333 | DEdeg | 61.65441639 | EpRA 1990 | 1.67 | |||||
| EpDE 1990 | 1.72 | E RAdeg | 3.9 | E DEdeg | 3.8 | Posflg | |||||
| Corr | -0.2 |