HD 107146
star in the constellation Coma Berenices
HD 107146 is a star in the constellation Coma Berenices that is located about 90 light-years (28 pc) from Earth. The apparent magnitude of 7.028 makes this star too faint to be seen with the unaided eye.
The physical properties of this star are similar to the Sun, including the stellar classification G2V, making this a solar analog. The mass of this star is about 109% of the solar mass (M☉) and it has about 99% the radius of the Sun (R☉). It is a young star with an age between 80 and 200 Myr. The axis of rotation is estimated at 21+8−9 degrees to the line of sight and it completes a rotation in a relatively brief 3.5 days.
Circumstellar disc
In 2003, astronomers recognized the excess infrared and submillimeter emission indicative of circumstellar dust, the first time such a debris disk phenomenon was noted around a star of similar spectral types to the Sun, though having a much younger age. In 2004 the Hubble Space Telescope detected the presence of a spatially resolved disk surrounding the star.
The star's circumstellar disc has dimensions of approximately 210 × 300 AU. The dusty ring is cool, with a temperature of 51 K (−222 °C; −368 °F), and has a dust mass of 0.250±0.004 M🜨 and nearly no gas. 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.
The public source identifies “HD 107146” as star in the constellation Coma Berenices. This brief keeps that definition visible, then builds a research path around star, constellation and Coma.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 11, 2026. The linked authority identifier is Q2620271. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2003 and 2004.
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This entry incorporates text from “HD 107146” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.