(18169) Amaldi

Asteroid (18169) Amaldi
Properties of the orbit ( animation ) Epoch: July 31, 2016 ( JD 2,457,600.5)
Orbit type	Main outer belt asteroid
Major semi-axis	3.1533 AU
eccentricity	0.1597
Perihelion - aphelion	2.6497 AU - 3.6570 AU
Inclination of the orbit plane	10.0984 °
Length of the ascending node	246.4071 °
Argument of the periapsis	198.1843 °
Time of passage of the perihelion	September 27, 2018
Sidereal period	5.60 a
Physical Properties
Medium diameter	23,311 km (± 4,444)
Albedo	0.033 (± 0.017)
Absolute brightness	12.5 mag
history
Explorer	Vincenzo Silvano Casulli
Date of discovery	August 20, 2000
Another name	2000 QF , 1950 UA, 1984 WQ, 1998 KR ₁₇
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

(18169) Amaldi is an asteroid of the main outer belt discovered by the Italian amateur astronomer Vincenzo Silvano Casulli on August 20, 2000 at the Osservatorio di Colleverde ( IAU code 596). The observatory founded by Casulli was located from 1981 to 2003 in the city of Guidonia Montecelio in the then province of Rome, today's metropolitan city of Rome capital . There had been sightings of the asteroid before: on October 17, 1950 under the provisional name 1950 UA at the Goethe Link Observatory in Indiana , on November 18 and 24, 1984 (1984 WQ) at the Anderson Mesa Station of the Lowell Observatory in Coconino County , Arizona and on May 22 and 24, 1998 (1998 KR ₁₇ ) at the Lincoln Laboratory Experimental Test System in Socorro , New Mexico as part of the Lincoln Near Earth Asteroid Research (LINEAR) project.

In October 2006, Casulli tried to determine the asteroid's light curve . However, the data were too imprecise for a reliable statement.

(18169) Amaldi was named on April 6, 2012 after the Italian physicist Edoardo Amaldi (1908–1989), who worked with Enrico Fermi and, among other things, was the founder of the Istituto Nazionale di Fisica Nucleare and the first general director of CERN .