Discovery [1] | |
---|---|
Discovered by |
E. F. Helin M. Barucci |
Discovery site | CERGA Obs. |
Discovery date | 15 August 1985 |
Designations | |
(3752) Camillo | |
Pronunciation | /kəˈmɪloʊ/ |
Named after | Camillo (son of King Turno and son of discoverer) [2] |
1985 PA | |
NEO · Apollo [1] [3] | |
Orbital characteristics [3] | |
Epoch 23 March 2018 ( JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 42.26 yr (15,436 d) |
Aphelion | 1.8400 AU |
Perihelion | 0.9871 AU |
1.4135 AU | |
Eccentricity | 0.3017 |
1.68 yr (614 d) | |
41.249 ° | |
0° 35m 11.4s / day | |
Inclination | 55.555° |
147.98° | |
312.22° | |
Earth MOID | 0.0780 AU (30.3871 LD) |
Physical characteristics | |
Mean diameter | 2.3
km (approx.)
[4] 2.306±0.088 km [5] [6] 2.328 km [7] 2.33 km (taken) [8] |
37.846
h
[9] 37.881±0.005 h [10] | |
0.210±0.036
[5]
[6] 0.22 [4] 0.2234 [7] | |
S (assumed) [8] | |
15.3 [3] · 15.41 [8] [9] · 15.41±0.13 [7] · 15.5 [5] | |
3752 Camillo is an inclined contact-binary asteroid, classified as near-Earth object of the Apollo group, approximately 2.3 kilometers (1.4 miles) in diameter. It was discovered on 15 August 1985, by astronomers Eleanor Helin and Maria Barucci using a 0.9-metre (35 in) telescope at the CERGA Observatory in Caussols, France. Lightcurve studies by Petr Pravec in 1998 suggest that the assumed S-type asteroid has an elongated shape and a longer-than average rotation period of 38 hours. [1] [4]
Camillo orbits the Sun at a distance of 0.99–1.8 AU once every 20 months (614 days; semi-major axis of 1.41 AU). Its orbit has an eccentricity of 0.30 and an inclination of 56 ° with respect to the ecliptic. [3]
The closest point between the orbit of the Earth and the orbit of this asteroid (Earth MOID) is currently 0.0780 AU (11,670,000 km; 7,250,000 mi) or 30 lunar distances, [3] so Camillo does not come close enough to Earth to qualify as a potentially hazardous asteroid. It came to perihelion (its closest approach to the Sun) on 6 January 1976 and, on 17 February 1976 and passed within 0.08013 AU (11,987,000 km; 7,449,000 mi) of Earth. [3]
Camillo came to perihelion on 27 December 2012. [3] On 12 February 2013 the asteroid passed 0.14775 AU (22,103,000 km; 13,734,000 mi) from Earth [3] and had an apparent magnitude of 13. [4] During the 2013 passage the asteroid was studied by radar using Goldstone and Arecibo. [4]
Camillo's south to north daily motion in the sky as seen from the earth |
On February 20, 2018, the asteroid passed by Earth. It was observed on radar by Arecibo Observatory and shown to have a long angular double-lobed shape. [11] At 0.13 AU (19,000,000 km; 12,000,000 mi) distance its peak magnitude was about 13.
Camillo's south to north daily motion in the sky as seen from the earth |
This minor planet was named for the son of the early Roman King Turno. "Camillo" is also the name of the discoverer's son. [2] The official naming citation was published by the Minor Planet Center on 20 May 1989 ( M.P.C. 14633). [14]