Beta Ursae Minoris Observation data Epoch J2000 | | Constellation | Ursa Minor | | Right ascension | 14h 50m 42.3s | | Declination | +74° 09′ 20″ | | Apparent magnitude (V) | 2.07 | | Characteristics | | Spectral type | K4 III | | B-V color index | 1.47 | | U-B color index | 1.77 | | Variable type | ? | | Astrometry | | Radial velocity (Rv) | +16.8 km/s | | Proper motion (μ) | RA: -32.29 mas/yr Dec.: 11.91 mas/yr | | Parallax (π) | 25.79 ± 0.52 mas | | Distance | 126 ly (38.8 pc) | | Absolute magnitude (MV) | -0.88 | | Details | | Mass | 4.4 M☉ | | Radius | 50 R☉ | | Luminosity | 500 L☉ | | Temperature | 4,000 K | | Metallicity | ? | | Rotation | ~17 km/sec. | | Age | ? years | | Other designations | Kochab, Kocab, Kochah, 7 Ursae Minoris, Al Kaukab al Shamaliyy, HR 5563, BD +74 595, HD 131873, GCTP 3373.00, SAO 8102, FK5 550, HIP 72607. | Beta Ursae Minoris (β UMi / β Ursae Minoris) is the second brightest star in the bowl of the "Little Dipper," the constellation Ursa Minor. It also has the traditional name Kochab. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ...
Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ...
Ursa Minor is a constellation in the northern sky, the name of which means Small Bear in Latin. ...
Right ascension (RA; symbol α: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ...
In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ...
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In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ...
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Most stars are of almost constant luminosity. ...
This article does not cite its references or sources. ...
Radial velocity is the velocity of an object in the direction of the line of sight. ...
kilometre per second is an SI derived unit of both speed (scalar) and velocity (vector), signified by the symbol km/s or km s-1. ...
The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real...
A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ...
A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ...
A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ...
A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ...
Parallax (Greek: ÏαÏαλλαγή (parallagé) = alteration) is the change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer. ...
A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ...
The distance between two points is the length of a straight line segment between them. ...
A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ...
The parsec (symbol pc) is a unit of length used in astronomy. ...
In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us. ...
Mass is a property of a physical object that quantifies the amount of matter it contains. ...
In astronomy, the solar mass is a unit of mass used to express the mass of stars and larger objects such as galaxies. ...
RADIUS (Remote Authentication Dial In User Service) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ...
In astronomy, the solar radius is a unit of length used to express the size of stars and larger objects such as galaxies. ...
Luminosity has different meanings in several different fields of science. ...
The solar luminosity, , is a unit of luminosity (power emitted in the form of photons) conventionally used by astronomers to give the luminosities of stars. ...
Temperature is also the name of a song by Sean Paul. ...
The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ...
In astronomy, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium. ...
Rotation of a plane, seen as the rotation of the terrain relative to the plane (exposure time 1. ...
The Pleiades star cluster A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ...
A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ...
In astronomy, many stars are referred to simply by catalogue numbers. ...
In astronomy, many stars are referred to simply by catalogue numbers. ...
In astronomy, many stars are referred to simply by catalogue numbers. ...
The Henry Draper Catalogue is an astronomy catalogue with astrometric and spectroscopic data about more than 225,000 stars. ...
In astronomy, many stars are referred to simply by catalogue numbers. ...
The Smithsonian Astrophysical Observatory (SAO) is a research institute of the Smithsonian Institution headquartered in Cambridge, Massachusetts, where it is joined with the Harvard College Observatory (HCO) to form the Harvard-Smithsonian Center for Astrophysics (CfA). ...
In astronomy, many stars are referred to simply by catalogue numbers. ...
Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ...
Ursa Minor is a constellation in the northern sky, the name of which means Small Bear in Latin. ...
Kochab was the naked-eye star that served as the Earth's North pole star from 1900 BC to 1100 BC, although it was never as close to the pole as Polaris is now. Due to precession of the equinoxes, the previous holder of the title was Thuban, and the next was the present-day Polaris. Earth is the third planet in the solar system. ...
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Precession of the equinoxes refers to the precession of the Earths axis of rotation. ...
The star (or star system) Thuban, also known as α Draconis (alpha Draconis), is a star in the constellation of Draco. ...
Polaris (α UMi / α Ursae Minoris / Alpha Ursae Minoris) is the brightest star in the constellation Ursa Minor. ...
The name "Kochab" derives from Arabic الكوكب al-kawkab and means simply "the star". The Arabic language (Arabic: â translit: ), or simply Arabic (Arabic: â translit: ), is the largest member of the Semitic branch of the Afro-Asiatic language family (classification: South Central Semitic) and is closely related to Hebrew and Aramaic. ...
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