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3752 Camillo

Inclined contact-binary asteroid

3752 Camillo

Inclined contact-binary asteroid

FieldValue
minorplanetyes
name3752 Camillo
image3752 Camillo Radar.jpg
captionRadar image of Camillo taken by the Arecibo Observatory on 21 February 2018, revealing its angular bilobate shape
background#FFC2E0
discovery_ref
discovered15 August 1985
discovererE. F. Helin
M. Barucci
discovery_siteCERGA Obs.
mpc_name(3752) Camillo
alt_names1985 PA
pronounced
named_afterCamillo (son of King Turno and son of discoverer)
mp_categoryNEOApollo
orbit_ref
epoch23 March 2018 (JD 2458200.5)
uncertainty0
observation_arc42.26 yr (15,436 d)
aphelion1.8400 AU
perihelion0.9871 AU
semimajor1.4135 AU
eccentricity0.3017
period1.68 yr (614 d)
mean_anomaly41.249°
mean_motion/ day
inclination55.555°
asc_node147.98°
arg_peri312.22°
moid0.0780 AU (30.3871 LD)
mean_diameter(approx.)
(taken)
rotation
albedo
0.22
spectral_typeS (assumed)
abs_magnitude15.315.4115.5

M. Barucci

(taken)

0.22

** 3752 Camillo** is an inclined contact-binary asteroid, classified as near-Earth object of the Apollo group, approximately 2.3 km in diameter. It was discovered on 15 August 1985, by astronomers Eleanor Helin and Maria Barucci using a 0.9 m 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.

Orbit

The orbit of Camillo is highly inclined. Vertical lines show the distance above and below the ecliptic every 30 days.

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.

Close approaches

The closest point between the orbit of the Earth and the orbit of this asteroid (Earth MOID) is currently 0.0780 AU or 30 lunar distances, 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 of Earth.

2013 passage

Camillo came to perihelion on 27 December 2012. On 12 February 2013 the asteroid passed 0.14775 AU from Earth and had an apparent magnitude of 13. During the 2013 passage the asteroid was studied by radar using Goldstone and Arecibo.

[[File:3752 Camillo skypath-2013.png480px]]
Camillo's south to north daily motion in the sky as seen from the earth

2018 passage

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. At 0.13 AU distance its peak magnitude was about 13.

[[File:3752 Camillo skypath-2018.png480px]]
Camillo's south to north daily motion in the sky as seen from the earth

Naming

This minor planet was named for the son of the early Roman King Turno. "Camillo" is also the name of the discoverer's son. The official naming citation was published by the Minor Planet Center on 20 May 1989 (M.P.C. 14633).

References

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References

  1. (21 February 2018). "Radar images of 3752 Camillo". Arecibo Observatory (on Twitter).
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