364 Isara
main-belt asteroid
364 Isara is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 19 March 1893, by French astronomer Auguste Charlois at the Nice Observatory in southeast France. The asteroid was named after the Isère River in France.
Orbit and classification
Isara is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main-belt.
It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,209 days). Its orbit has an eccentricity of 0.15 and an inclination of 6° with respect to the ecliptic. The body's observation arc begins at Vienna Observatory in April 1900, seven years after to its official discovery observation at Nice.
Physical characteristics
In the Tholen classification, Isara is a common stony S-type asteroid, which agrees with the overall spectral type of the Flora family.
Rotation period
In 2009, photometric observations of Isara were made by American astronomer Brian Warner at the Palmer Divide Observatory (716) in Colorado, by amateur astronomer René Roy at Blauvac Observatory (627) in France, and by a group of Polish astronomers led by Agnieszka Kryszczyńska of the Polish Astronomical Society. The resulting asymmetrical lightcurves showed a synodic rotation period between 9.151 and 9.157 hours with a brightness variation between 0.30 and 0.40 in magnitude (U=3/3/2+).
This brief starts where responsible research should: with the source description of “364 Isara” as main-belt asteroid. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the general reference register because the source frames it as main-belt asteroid. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 4, 2026. The linked authority identifier is Q151927. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1893, 1900 and 2009.
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This entry incorporates text from “364 Isara” 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.