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Encyclopedia > Ross 128

Ross 128
Observation data
Epoch J2000
Constellation Virgo
Right ascension 11h 47m 44.4s
Declination +00° 48' 16"
Apparent magnitude (V) 11.16
Characteristics
Spectral type M4 V
B-V color index 1.76
U-B color index 1.34
Variable type Flare star
Astrometry
Radial velocity (Rv) -31.3 km/s
Proper motion (μ) RA: 605.62 mas/yr
Dec.: -1219.23 mas/yr
Parallax (π) 298.72 ± 1.35 mas
Distance 10.92 ± 0.05 ly
(3.35 ± 0.02 pc)
Absolute magnitude (MV) 13.54
Details
Mass 0.156 M
Radius 0.21 R
Luminosity 0.00029 L
Temperature 2,800 K
Metallicity
Rotation
Age years
Other designations
FI Virginis, GCTP 2730, LHS 315, GJ 447, Gl 010-050, Vyssotsky 286, LTT 13240, LFT 852, HIP 57548.

Ross 128 is a red dwarf star that is one of the nearest stars to the Solar System. Its closest neighbour is Wolf 359, 1.16 pc or 3.79 ly away. Ross 128 is near the line of the ecliptic, near the constellation of Virgo. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... This article or section does not cite its references or sources. ... See VIRGO (physics) for a French-Italian project in physics. ... 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. ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... 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. ... In astronomy, color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. ... In astronomy, color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature. ... Most stars are of almost constant luminosity. ... A flare star is a variable star which can undergo unpredictable dramatic increases in brightness for a few minutes or a few hours. ... 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. ... This article or section does not cite its references or sources. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... Distance is a numerical description of how far apart things lie. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... Stellar parallax motion 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 (in the absence of interstellar extinction!). It allows the overall brightnesses of objects to be compared without regard to distance. ... Unsolved problems in physics: What causes anything to have mass? Mass is a property of a physical object that quantifies the amount of matter and energy it is equivalent to. ... In astronomy, the solar mass is a unit of mass used to express the mass of stars and larger objects such as galaxies. ... Remote Authentication Dial In User Service (RADIUS) 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. ... In thermodynamics, temperature is the physical property of a system that underlies the common notions of hot and cold —something that is hotter has the greater temperature. ... The Kelvin scale is a thermodynamic (absolute) temperature scale where absolute zero—the lowest possible temperature where nothing could be colder and no heat energy remains in a substance—is defined as zero kelvin (0 K). ... In astronomy, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium. ... A sphere rotating around its axis. ... The Pleiades, an open cluster of stars in the constellation of Taurus. ... 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. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... Alexander N. Vyssotsky (born May 23, 1888 in Moscow, Russia; died December 31, 1973 in Winter Park, Florida) was an astronomer. ... In astronomy, many stars are referred to simply by catalogue numbers. ... Red Dwarf is a British science fiction sitcom that ran for eight series, from 1988 to 1999. ... The Pleiades, an open cluster of stars in the constellation of Taurus. ... Major features of the Solar System (not to scale): The Sun, the eight planets, the asteroid belt containing the dwarf planet Ceres, outermost there is the dwarf planet Pluto (the dwarf planet Eris not shown), and a comet. ... Wolf 359 is a star located approximately 2. ... The plane of the ecliptic is well seen in this picture from the 1994 lunar prospecting Clementine spacecraft. ... This article or section does not cite its references or sources. ... See VIRGO (physics) for a French-Italian project in physics. ...


In fiction

See Ross 128 in fiction.

Star systems other than the Solar System are a staple element in much science fiction. ...

See also

This list of the nearest stars to Earth is ordered by increasing distance out to a maximum of 5 parsecs (16. ... Frank Elmore Ross (April 2, 1874 – September 21, 1960) was an American astronomer and physicist. ...

External links


  Results from FactBites:
 
Ross 128 (160 words)
Ross 128, also known as FI Virginis, lies in the constellation Virgo near the line of the ecliptic, at a distance of 10.83 light-years (3.3 pc).
It was discovered in 1925 by Frank Elmore Ross who first reported it in his "Second List of New Proper-Motion Stars," Astronomical Journal (36:856).
Its closest neighbour is Wolf 359, at a distance of 3.79 light-years (1.16 pc).
Ross 128 (798 words)
Ross 128 would be only one of many unremarkable stars except that it appears to be a flare star as well as one of Sol's closest neighbors.
In contrast to Proxima Centauri which is a "magnetically younger" flare star that is "activity saturated", however, Ross 128 is considered to be a more "evolved" flare star where its flare rate may have decreased somewhat with increased magnetic evolution (Andrew Skumanich, 1986).
Ross 128 is a flare star, like UV Ceti (Luyten 726-8 B) shown flaring at left.
  More results at FactBites »

 

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