HD 107146

False colour image of HD 107146 taken by the Hubble Space Telescope, showing its circumstellar disc. The right side of the disc is brighter—this is thought to be because it is closer to the Earth.
Observation data Epoch J2000.0[1]
Constellation (pronunciation)	Coma Berenices[2]
Right ascension	12h 19m 06. In Astronomy, an epoch is a moment in time used as a reference for the Orbital elements of a Celestial body. In Astronomy, an epoch is a moment in time used as a reference for the Orbital elements of a Celestial body. In common usage a constellation is a group of celestial bodies that are connected together in some arrangement typically stars to form a visible figure or picture Each culture has its own Constellations usually based on Mythology. Coma Berenices ( Berenice 's Hair) is a traditional asterism that has since become a Constellation. Right ascension (abbrev RA; symbol α) is the Astronomical term for one of the two Coordinates of a point on the Celestial sphere 5015s[1]
Declination	16° 32′ 53. In Astronomy, declination (abbrev dec or δ) is one of the two coordinates of the Equatorial coordinate system, the other being either 869″[1]
Apparent magnitude (V)	7. The apparent magnitude ( m) of a celestial body is a measure of its Brightness as seen by an observer on Earth, normalized to the value 07[1]
Characteristics
Spectral type	G2V[1]
Astrometry
Radial velocity (Rv)	6. In Astronomy, stellar classification is a classification of Stars based initially on photospheric temperature and its associated Spectral characteristics Astrometry is the branch of Astronomy that relates to precise measurements and explanations of the positions and movements of Stars and other celestial bodies Radial velocity is the Velocity of an object in the direction of the line of sight (i 2[1] km/s
Proper motion (μ)	RA: -175. The proper motion of a Star is the measurement of its change in position in the sky over time after Improper motions are accounted for 65[1] mas/yr Dec. A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60 of one degree. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun : -148. 28[1] mas/yr
Parallax (π)	35. A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60 of one degree. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun Parallax is an apparent displacement or difference of orientation of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between 07[1] ± 0. 88[1] mas
Distance	92. A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60 of one degree. Distance is a numerical description of how far apart objects are 96[3] ly (28. A light-year or light year (symbol ly) is a unit of Length, equal to just under ten trillion Kilometres As defined by 5[3] pc)
Details
Luminosity	1. History The first direct measurements of an object at interstellar distances were undertaken by German Astronomer Friedrich Wilhelm Bessel in 1838 Luminosity has different meanings in several different fields of science 1[4] L☉
Age	80 - 200 myr[3] years
Other designations
NLTT 30317, GSC 01445-02267, PLX 2836, SAO 100038, AG+16 1260, HD 107146, PPM 128955, SKY# 23079, AGKR 11033, HIC 60074, RBS 1096, SPOCS 527, ASCC 867033, HIP 60074, 2RE J1219+163, TYC 1445-2267-1, BD+17 2462, IRAS 12165+1649, 2RE J121906+163301, UBV M 18049, BSD 80-883, IRAS F12165+1649, RE J121908+163239, UBV 11059, GC 16796, LSPM J1219+1632, RE J1219+163, USNO-B1. The solar luminosity, L_\odot is a unit of Luminosity ( power emitted in the form of Photons conventionally used by Astronomers to A star is a massive luminous ball of plasma. The nearest star to Earth is the Sun, which is the source of most of the Energy on Earth This article is about the unit of time For the Magic the Gathering creatures see Creatures of Magic The Gathering. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun A star catalogue, or star catalog, is an Astronomical catalogue that lists Stars In Astronomy, many stars are referred to simply by catalogue The Henry Draper Catalogue ( HD) is an Astronomical Star catalogue published between 1918 and 1924 giving Spectroscopic classifications The Hipparcos and Tycho Catalogues (Tycho-1 are the primary products of the European Space Agency 's astrometric mission Hipparcos. 0 1065-00201409, GCRV 7378, LTT 13439, RX J1219. 1+1632, uvby98 100107146, GEN# +1. 00107146, 2MASS J12190650+1632541, 1RXS J121906. 8+163259, YZ 16 4641[1]

HD 107146 is a G2V (yellow dwarf) star, located 88 light years from Earth. In Astronomy, stellar classification is a classification of Stars based initially on photospheric temperature and its associated Spectral characteristics In Astronomy, a G V star is a Main-sequence Star of spectral type G and luminosity class V A star is a massive luminous ball of plasma. The nearest star to Earth is the Sun, which is the source of most of the Energy on Earth A light-year or light year (symbol ly) is a unit of Length, equal to just under ten trillion Kilometres As defined by EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 ^[3] In 2003, astronomers recognized the excess infrared^[5] and submillimeter^[3] emission indicative of circumstellar dust, the first time such a debris disk phenomenon was noted around a star of similar spectral types as the Sun, though having a much younger age. Year 2003 ( MMIII) was a Common year starting on Wednesday of the Gregorian calendar. A debris disk is a ring-shaped Circumstellar disk of dust and debris in orbit around a Star. The Sun (Sol is the Star at the center of the Solar System. In 2004 the Hubble Space Telescope detected the presence of a spatially resolved disc surrounding the star^[6][4] Observations have given the age of the star at between 80 and 200 Myr. "MMIV" redirects here For the Modest Mouse album see " Baron von Bullshit Rides Again " The Hubble Space Telescope ( HST; also known colloquially as "the Hubble" or just "Hubble" is a space telescope that was carried into This article is about the unit of time For the Magic the Gathering creatures see Creatures of Magic The Gathering. ^[3]

Circumstellar disc

The stars circumstellar disc has dimensions of approximately 210 x 300 AU. The astronomical unit ( AU or au or au or sometimes ua) is a unit of Length based on the distance from the Earth to the ^[3] The dusty ring is cool, with a temperature of 51 K, and has a mass of 0. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic 10 M_⊕. ^[3] Analysis of the debris disk in the far-infrared and submillimeter wavelengths, carried out using the Hubble Space Telescope, suggests the presence of small grains in the disk. Infrared ( IR) radiation is Electromagnetic radiation whose Wavelength is longer than that of Visible light, but shorter than that of ^[4] The disk appears to be slightly elongated to form an ellipse with its minor axis at a position angle of 58° ± 5°; working under the assumption that the disk is in fact circular gives it an inclination of 25° ± 5° from the plane of the sky. In Mathematics, an ellipse (from the Greek ἔλλειψις literally absence) is a Conic section, the locus of points in a Inclination in general is the Angle between a Reference plane and another plane or axis of direction ^[4]

References