Friday, 10 April 2015

(243) Ida, elements that fix attention

(243) Ida is a main belt asteroid discovered in September of 1884. It was spotted without being identified in February of 1988.

The orbit is located at the outter main belt. It has a perihelion of 2.74 AU and an aphelion of 2.98 AU. The semimajor axis is at 2.86 AU. It has an orbital period of 4 years and 306 days. It has an inclination of 1.1º.


Dactil, a satellite of 1.4 km, was discovered in August of 1993 and anounced in March of 1994. It was officially named in September of 1994.

Orbital resonance:
7:18 with Mars (99.9%)
-
3:4 with Vesta (99.9%)
9:10 with Juno (99.8%)
15:13 with Hygiea (99.8%)
9:8 with Europa (99.9%)
8:9 with Eunomia (99.9%)



Greek mythology

Mount Ida, the current mount Psiloritis (in modern Greek Ψηλωρείτης "monte alto"), stands in the Amari Valley, in the center of the Greek island of Crete. It is the highest peak on the island, with a height of 2456 meters (8,057 feet).


(243) Ida is related with elements that fix attention on a single point or direction (3:4 resonance with Vesta), such as for example a lighthouse on the coast or traffic lights in a cross street, the reflectors of a bike or the green light of an electronic device when it is on.