19 Fortuna
Template:Short description Template:Use dmy dates Script error: No such module "infobox".Script error: No such module "Check for unknown parameters".
19 Fortuna is one of the largest main-belt asteroids. It has a composition similar to 1 Ceres: a darkly colored surface that is heavily space-weathered with the composition of primitive organic compounds, including tholins.
Fortuna is 225 km in diameter and has one of the darkest known geometric albedos for an asteroid over 150 km in diameter. Its albedo has been measured at 0.028 and 0.037.[1] The spectra of the asteroid displays evidence of aqueous alteration.[2]
Discovery and naming
It was discovered by J. R. Hind on 22 August 1852, and named after Fortuna, the Roman goddess of luck. Its historical symbol was a star over Fortune's wheel; it was encoded in Unicode 17.0 as U+1CECC (File:Fortuna symbol (fixed width).svg).[3][4]
.svg){kind=link}
Physical characteristics
The Hubble Space Telescope observed Fortuna in 1993. It was resolved with an apparent diameter of 0.20 arcseconds (4.5 pixels in the Planetary Camera) and its shape was found to be nearly spherical. Satellites were searched for but none were detected.
Stellar occultations by Fortuna have been observed several times. Fortuna has been studied by radar.[5]
Fortuna has been perturbed by the 80 km 135 Hertha and was initially estimated by Baer to have a mass of 1.08Template:E kg.[6] A more recent estimate by Baer suggests it has a mass of 1.27Template:E kg.[7]
On 21 December 2012, Fortuna (~200 km) harmlessly passed within 6.5 million km of asteroid 687 Tinette.[8]
Notes
References
<templatestyles src="Reflist/styles.css" />
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
- ↑ Generated with Solex 10 Template:Webarchive by Aldo Vitagliano
Script error: No such module "Check for unknown parameters".
External links
Script error: No such module "Navbox". Template:Large asteroids Script error: No such module "Navbox". Template:Authority control