15460 Manca
Asteroid
From Wikipedia, the free encyclopedia
15460 Manca (provisional designation 1998 YD10) is a Koronian asteroid from the outer region of the asteroid belt, approximately 5 kilometers in diameter.
| Discovery[1] | |
|---|---|
| Discovered by | A. Boattini L. Tesi |
| Discovery site | San Marcello Pistoiese Obs. |
| Discovery date | 25 December 1998 |
| Designations | |
| (15460) Manca | |
Named after | Francesco Manca (Italian astronomer)[2] |
| 1998 YD10 · 1994 ET1 | |
| main-belt · Koronis[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.30 yr (24,216 days) |
| Aphelion | 3.1671 AU |
| Perihelion | 2.6460 AU |
| 2.9065 AU | |
| Eccentricity | 0.0896 |
| 4.96 yr (1,810 days) | |
| 316.30° | |
| 0° 11m 56.04s / day | |
| Inclination | 3.2872° |
| 92.423° | |
| 320.81° | |
| Physical characteristics | |
| Dimensions | 5.17 km (calculated)[3] 5.354±0.315 km[4][5] |
| 7.2723±0.0209 h[6] | |
| 0.24 (assumed)[3] 0.2949±0.0586[4] 0.295±0.059[5] | |
| X[7] · S[3] | |
| 12.97±0.29[7] · 13.3[4] · 13.6[1][3] · 14.114±0.005 (S)[6] | |
The asteroid was discovered on 25 December 1998, by Italian astronomers Andrea Boattini and Luciano Tesi at Pistoia Mountains Astronomical Observatory in San Marcello Pistoiese, central Italy.[8] It was named for Italian amateur astronomer Francesco Manca.[2]
Orbit and classification
Manca belongs to the Koronis family, a family of stony asteroids in the outer main-belt with nearly ecliptical orbits. It orbits the Sun at a distance of 2.6â3.2 astronomical units (AU) once every 4 years and 12 months (1,810 days). Its orbit has an eccentricity of 0.09 and an inclination of 3° with respect to the ecliptic.[1]
The asteroid's observation arc begins 48 years prior to its official discovery observation, with a precovery taken at the Palomar Observatory in March 1950.[8]
Physical characteristics
Manca has also been characterized as an X-type asteroid by Pan-STARRS photometric survey.[7]
Rotation period
In August 2012, a rotational lightcurve was obtained for Manca from photometric observations made at the Palomar Transient Factory, California. Analysis of the lightcurve gave a rotation period of 7.2723 hours with a brightness variation of 0.22 magnitude (U=2).[6]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Manca measures 5.35 kilometers in diameter and its surface has an albedo of 0.295.[4][5] The Collaborative Asteroid Lightcurve Link assumes a stony standard albedo for members of the Koronis family of 0.24, and calculates a diameter of 5.17 kilometers with an absolute magnitude of 13.6.[3]
Naming
This minor planet was named for Italian amateur astronomer Francesco Manca (born 1966), member of the "Gruppo Astrofili Brianza" and an active observer of near-Earth objects, and potentially hazardous asteroids in particular, at Sormano Astronomical Observatory in northern Italy.[2] The official naming citation was published by the Minor Planet Center on 13 October 2000 (M.P.C. 41388).[9]
