1021 Flammario
1021 Flammario, provisional designation, is a dark background asteroid from the central regions of the asteroid belt, approximately in diameter. It was discovered on 11 March 1924, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. The asteroid was named after French astronomer Camille Flammarion. An F-type asteroid, it has a rotation period of 12.16 hours.
Orbit and classification
Flammario is a non-family asteroid from the main belt's background population. It orbits the Sun in the central asteroid belt at a distance of 2.0–3.5 AU once every 4 years and 6 months. Its orbit has an eccentricity of 0.29 and an inclination of 16° with respect to the ecliptic.The asteroid was first observed as at Taunton Observatory in February 1910. The body's observation arc begins at the Pulkovo Observatory near Saint Petersburg, Russia, in January 1928, more than four years after its official discovery observation at Heidelberg.
Physical characteristics
In the SMASS classification, Flammario is a "bright" carbonaceous B-type, while it is an uncommon F-type asteroid in the Tholen taxonomy.. More recent polarimetric observations also characterized the asteroid as a dark F-type.Rotation period
Several rotational lightcurves of Flammario have been obtained from photometric observations since the 1990s. Analysis of the best-rated lightcurve obtained by French amateur astronomer Laurent Bernasconi in January 2005 gave a rotation period of 12.160 hours with a consolidated brightness amplitude between 0.14 and 0.40 magnitude.Poles
In 2016, a modeled lightcurve using photometric data from various sources, rendered a similar sidereal period of 12.15186 hours and two spin axes of and in ecliptic coordinates.Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Flammario measures between 84.78 and 105 kilometers in diameter and its surface has a low albedo between 0.04 and 0.05.The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0458 and a diameter of 99.39 kilometers based on an absolute magnitude of 8.98.