Discovery [1] [2] | |
---|---|
Discovered by | N. R. Pogson |
Discovery site | Madras Obs. |
Discovery date | 17 November 1868 |
Designations | |
(107) Camilla | |
Pronunciation | /kəˈmɪlə/ [3] |
Named after | Camilla (Roman mythology) [4] |
A868 WA, 1893 QA 1938 OG, 1949 HD1 | |
main-belt ·(outer) [1] Sylvia · Cybele | |
Adjectives | Camillian or Camillean, /kəˈmɪliən/ |
Orbital characteristics [1] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 149.17 yr (54,485 d) |
Aphelion | 3.7202 AU |
Perihelion | 3.2622 AU |
3.4912 AU | |
Eccentricity | 0.0656 |
6.52 yr (2,383 d) | |
265.91° | |
0° 9m 3.96s / day | |
Inclination | 10.001° |
172.61° | |
306.77° | |
Known satellites | 2 [5] [6] [7] |
Physical characteristics | |
Dimensions | 285 km × 205 km × 170 km [8] 344 km × 246 km × 205 km [9] |
254±12 km [10] 200.37±3.51 km [11] 210.370±8.326 km [12] 222.62±17.1 km [13] 241.6±35.0 km [14] 243.3±12.4 km [15] | |
Mass | (11.2±0.1)×1018 kg [10] [9] |
Mean density | 1.28±0.04 g/cm3 [10] 1.40±0.30 g/cm3 [9] |
4.844 h [16] [17] [lower-alpha 1] | |
0.043±0.012 [15] 0.045±0.019 [14] 0.0525±0.009 [13] 0.059±0.012 [12] 0.065±0.003 [11] | |
X (SMASS) [1] [18] C (Tholen) P (WISE) [19] B–V = 0.705 [1] U–B = 0.298 [1] | |
11.53 [20] | |
7.08 [1] [11] [13] [14] [15] [19] 7.1±0.02 [18] [21] [16] | |
107 Camilla is one of the largest asteroids from the outermost edge of the asteroid belt, approximately 250 kilometers (160 miles) in diameter. It is a member of the Sylvia family and located within the Cybele group. It was discovered on 17 November 1868, by English astronomer Norman Pogson at Madras Observatory, India, and named after Camilla, Queen of the Volsci in Roman mythology. [4] [2] The X-type asteroid is a rare trinary asteroid with two minor-planet moons discovered in 2001 and 2016, respectively. It is elongated in shape and has a short rotation period of 4.8 hours. [18]
Camilla has a very dark surface and primitive carbonaceous composition.
A large number of rotational lightcurves of have been obtained from photometric observations since the 1980s. [22] Best rated results gave a short rotation period of 4.844 hours with a brightness amplitude between 0.32 and 0.53 magnitude. [16] [17] [lower-alpha 1]
Lightcurve analysis indicates that Camilla's pole most likely points towards ecliptic coordinates (β, λ) = (+51°, 72°) with a 10° uncertainty, [8] which gives it an axial tilt of 29°. Follow-up modeling of photometric data gave similar results. [23] [24] [25]
10μ radiometric data collected from Kitt Peak in 1975 gave a first diameter estimate of 209 km. [26] According to the space-based surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, [11] [12] [13] [19] [21] as well as observations by the Keck Observatory and photometric modeling, [14] [15] [27] [23] [24] [28] [29] Camilla measures between 185 and 247 kilometers in diameter and its surface has an albedo between 0.160 and 0.294. [18]
Camilla is the 6th trinary asteroid that has been discovered in the asteroid belt, after 87 Sylvia, 45 Eugenia, 216 Kleopatra, 93 Minerva and 130 Elektra (a quaternary).
Discovery [6] | |
---|---|
Discovered by | A. Storrs, F. Vilas, R. Landis, E. Wells, C. Woods, B. Zellner, and M. Gaffey |
Discovery date | 1 March 2001 |
Orbital characteristics [10] | |
Observation arc | 5642 days |
1247.8±1.3 km | |
Eccentricity | 0.000±0.004 |
3.71234±0.00001 d | |
Inclination | 16.0°±0.8° |
Physical characteristics | |
12.7±3.5 km, assuming equal albedos and DCamilla = 254 km [10] 16±6 km [9] ~ 11 ± 2 km [27] | |
Mass | ~1.5×1015 kg [30] |
13.18 [27] | |
On 1 March 2001, a minor-planet moon of Camilla was found by A. Storrs, F. Vilas, R. Landis, E. Wells, C. Woods, B. Zellner, and M. Gaffey using the Hubble Space Telescope. [6] It has been designated S/2001 (107) 1 but has not yet received an official name.
Later observations in September 2005 with the Very Large Telescope (VLT) allowed the determination of an orbit. Apart from data in infobox, the inclination was found to be 3 ± 1° with respect to an axis pointing towards (β, λ) = (+55°, 75°). Given the ~10° uncertainty in the actual rotational axis of Camilla, one can say that the orbit's inclination is less than 10°.
The satellite is estimated to measure about 11 km in diameter. [27] Assuming a similar density to the primary, this would give it an approximate mass of ~1.5×1015 kg. It has a similar colour to the primary. [6]
Discovery [7] | |
---|---|
Discovered by | M. Marsset, B. Carry, B. Yang, F. Marchis, P. Vernazza, C. Dumas, J. Berthier, F. Vachier |
Discovery date | 29 May 2015 |
Orbital characteristics [10] | |
Observation arc | 428 days |
643.8±1.3 km | |
Eccentricity | 0.18+0.08 −0.06 |
1.376±0.005 d | |
Inclination | 27.7°±7.3° |
Satellite of | 107 Camilla |
Physical characteristics | |
4.0±1.2 km, assuming equal albedos and DCamilla = 254 km [10] | |
In 2016, the discovery of a second satellite of Camilla was reported by astronomers at Cerro Paranal's Very Large Telescope in Chile. It has the provisional designation S/2016 (107) 1. [7]
Observations were taken between 29 May 2015 and 30 July 2016, using the VLT-SPHERE, the principal instrument attached to the 8-meter "Melipal" (UT3) unit of the VLT. On 3 out of 5 observation sessions, the new satellite could be detected. [7] The body's orbit has a semi-major axis of 340 kilometers. [5]
65 Cybele is one of the largest asteroids in the Solar System. It is located in the outer asteroid belt. It is thought to be a remnant primordial body. It gives its name to the Cybele group of asteroids that orbit outward from the Sun from the 2:1 orbital resonance with Jupiter. The X-type asteroid has a relatively short rotation period of 6.0814 hours. It was discovered by Wilhelm Tempel in 1861, and named after Cybele, the earth goddess.
1036 Ganymed, provisional designation 1924 TD, is a stony asteroid on a highly eccentric orbit, classified as a near-Earth object of the Amor group. It was discovered by German astronomer Walter Baade at the Bergedorf Observatory in Hamburg on 23 October 1924, and named after Ganymede from Greek mythology. With a diameter of approximately 35 kilometers, Ganymed is the largest of all near-Earth objects but does not cross Earth's orbit. The S-type asteroid has a rotation period of 10.3 hours. In October 2024, it is predicted to approach Earth at a distance of 56,000,000 km; 35,000,000 mi (0.374097 AU).
1509 Esclangona, provisional designation 1938 YG, is a rare-type Hungaria asteroid and binary system from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It is named after French astronomer Ernest Esclangon.
25 Phocaea is a stony asteroid from the inner regions of the asteroid belt, approximately 75 kilometers in diameter. It is the parent body of the Phocaea family. Discovered by Jean Chacornac in 1853, it was named after the ancient Greek city of Phocaea.
63 Ausonia is a stony Vestian asteroid from the inner region of the asteroid belt, approximately 100 kilometers in diameter. It was discovered by Italian astronomer Annibale de Gasparis on 10 February 1861, from the Astronomical Observatory of Capodimonte, in Naples, Italy. The initial choice of name for the asteroid was "Italia", after Italy, but this was modified to Ausonia, an ancient classical name for the Italian region.
182 Elsa is a Massalia or background asteroid from the inner regions of the asteroid belt, approximately 44 kilometers in diameter. It was discovered on 7 February 1878, by Austrian astronomer Johann Palisa at the Austrian Naval Observatory in today's Croatia. The S-type asteroid has a very long rotation period of 80 hours and likely an elongated shape. The origin of its name is uncertain.
276 Adelheid is a dark Alauda asteroid from the outer region of the asteroid belt, approximately 121 kilometers in diameter. It was discovered by Austrian astronomer Johann Palisa at Vienna Observatory on 17 April 1888. The meaning of the asteroids's name is unknown.
849 Ara is a large, metallic background asteroid, approximately 80 kilometers in diameter, that is located in the outer region of the asteroid belt. It was discovered on 9 February 1912, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula. The M-type asteroid has a short rotation period of 4.1 hours and is likely elongated in shape. It was named after the American Relief Administration (ARA) for the help given during the Russian famine of 1921–22.
925 Alphonsina, provisional designation 1920 GM, is a stony Hansian asteroid from the central region of the asteroid belt, approximately 58 kilometers in diameter. It was discovered on 13 January 1920, by Catalan astronomer Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain. The S-type asteroid has a rotation period of 7.88 hours. It was named for the Spanish Kings Alfonso X and Alfonso XIII.
1089 Tama, provisional designation 1927 WB, is an elongated Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 12 kilometers in diameter.
3749 Balam is a stony Flora asteroid and rare trinary system orbiting in the inner regions of asteroid belt. It also forms a secured asteroid pair with sub-kilometer sized asteroid (312497) 2009 BR60. Balam was discovered on 24 January 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, and received the prov. designation 1982 BG1. It was named after Canadian astronomer David Balam. Balam measures approximately 4.1 kilometers (2.5 miles) in diameter. Its two minor-planet moons have an estimated diameter of 1.66 and 1.84 kilometers, respectively.
1627 Ivar is an elongated stony asteroid and near-Earth object of the Amor group, approximately 15×6×6 km. It was discovered on 25 September 1929, by Danish astronomer Ejnar Hertzsprung at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. It was named after Ivar Hertzsprung, brother of the discoverer. 1627 Ivar was the first asteroid to be imaged by radar, in July 1985 by the Arecibo Observatory.
1143 Odysseus, provisional designation 1930 BH, is a large Jupiter trojan located in the Greek camp of Jupiter's orbit. It was discovered on 28 January 1930, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany, and later named after Odysseus, the legendary hero from Greek mythology. The dark D-type asteroid has a rotation period of 10.1 hours. With a diameter of approximately 125 kilometers, it is among the 10 largest Jovian trojans.
(185851) 2000 DP107 is a sub-kilometer sized asteroid, classified as potentially hazardous asteroid and near-Earth object of the Apollo group that is notable because it provided evidence for binary asteroids in the near-Earth population. The PROCYON probe developed by JAXA and the University of Tokyo was intended to flyby this asteroid before its ion thruster failed and could not be restarted.
5905 Johnson, provisional designation 1989 CJ1, is a Hungaria asteroid and synchronous binary system from the innermost regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 11 February 1989, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. Its satellite measures approximately 1.6 km (1 mi) in diameter and orbits its primary every 21.8 hours. It was named after American astronomer and engineer Lindley N. Johnson.
1574 Meyer, provisional designation 1949 FD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 59 kilometers in diameter. It was discovered on 22 March 1949, by French astronomer Louis Boyer at Algiers Observatory in Algeria, northern Africa. It was named after French astronomer M. Georges Meyer.
3199 Nefertiti, provisional designation 1982 RA, is a rare-type asteroid, classified as near-Earth object of the Amor group of asteroids, approximately 2.2 kilometers in diameter. It was discovered on 13 September 1982, by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory, California, United States.
1980 Tezcatlipoca, provisional designation 1950 LA, is an eccentric, stony asteroid and near-Earth object of the Amor group, approximately 6 kilometers (4 mi) in diameter.
1263 Varsavia, provisional designation 1933 FF, is an asteroid from the central region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 23 March 1933, by Belgian astronomer Sylvain Arend at Uccle Observatory in Belgium. It is named for the city of Warsaw.
(164121) 2003 YT1, provisional designation 2003 YT1, is a bright asteroid and synchronous binary system on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 2 kilometers (1.2 miles) in diameter. It was discovered on 18 December 2003, by astronomers with the Catalina Sky Survey at the Catalina Station near Tucson, Arizona, in the United States. The V-type asteroid has a short rotation period of 2.3 hours. Its 210-meter sized minor-planet moon was discovered at Arecibo Observatory in May 2004.