Discovery [1] | |
---|---|
Discovery site | Perth Obs. (Bickley) |
Discovery date | 13 June 1971 |
Designations | |
(1806) Derice | |
Named after | Derice Harwood (wife of astronomer) [2] |
1971 LC ·1927 EB 1942 TD ·1949 YD 1967 EB | |
main-belt · Flora [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 67.44 yr (24,634 days) |
Aphelion | 2.4750 AU |
Perihelion | 1.9990 AU |
2.2370 AU | |
Eccentricity | 0.1064 |
3.35 yr (1,222 days) | |
74.051° | |
0° 17m 40.56s / day | |
Inclination | 3.8406° |
271.10° | |
193.78° | |
Physical characteristics | |
Dimensions | 7.976±0.759 [4] 10.14±0.41 km [5] 10.697±0.061 km [6] 10.7 km (derived) [7] |
3.22352±0.00004 h [lower-alpha 1] 3.2236±0.0005 h [lower-alpha 1] 3.2237±0.0001 h [lower-alpha 1] 3.2240±0.0005 h [8] 3.4602±0.0007 h [9] | |
0.035±0.149 [4] 0.2149 [7] 0.2474±0.0669 [6] 0.282±0.025 [5] | |
S [3] | |
11.65±0.06(R) [lower-alpha 1] ·12.00 [5] [6] ·12.1 [1] ·12.14±0.078 [3] [7] | |
1806 Derice, provisional designation 1971 LC, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. Discovered on 13 June 1971, at the Bickley site of the Perth Observatory in Western Australia, it was the first discovery of a minor planet ever made in Oceania. The asteroid was named after the wife of Dennis Harwood, staff member at Bickley. [2] [10]
The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,222 days). Its orbit has an eccentricity of 0.11 and an inclination of 4° with respect to the ecliptic. [1] The first used precovery was taken at Palomar Observatory in 1949, extending the asteroid's observation arc by 22 years prior to its official discovery at Bickley. The first unused observation dates back to 1927, at Tokyo Observatory. [10]
A large number of rotational lightcurves for this asteroid were obtained from several photometric observations. The first observations were made by Italian astronomer Silvano Casulli in November 2006, and gave a rotation period 3.4602±0.0007 hours with a brightness amplitude of 0.19 in magnitude ( U=3 ). [9]
One month later, in December 2006, observations at the Carbuncle Hill Observatory gave a period of 3.2240±0.0005 hours with an identical amplitude of 0.19 in magnitude ( U=3 ). [8]
Between November 2009 and December 2012, Czech astronomer Petr Pravec at Ondřejov Observatory obtained three more lightcurves with periods between 3.2235 and 3.2237 hours and corresponding amplitudes of 0.07. 0.10 and 0.10, respectively ( U=3/3/3 ). [lower-alpha 1]
According to the space-based surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures between 8.0 and 10.7 kilometers in diameter, respectively, and its surface has an albedo between 0.035 and 0.282. [4] [5] [6] Astronomer Petr Pravec and the Collaborative Asteroid Lightcurve Link derive an albedo of 0.21 and a diameter of 10.7 kilometers with an absolute magnitude of 12.4. [3] [7]
This minor planet was named after Derice Harwood, wife of Dennis Harwood, astrometric staff member of the discovering Perth Observatory. [2] The official naming citation was published by the Minor Planet Center on 11 December 1981 ( M.P.C. 6530). [11]
4923 Clarke, provisional designation 1981 EO27, is a stony background asteroid from the inner regions of the asteroid belt, approximately 3.5 kilometers (2.2 miles) in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia. The spheroidal S-type asteroid has a rotation period of 3.14 hours. It was named after British science fiction writer Arthur C. Clarke. On the same night, Schelte Bus also discovered 5020 Asimov.
1123 Shapleya, provisional designation 1928 ST, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 21 September 1928, by Russian astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula. It was named after American astronomer Harlow Shapley.
4899 Candace, provisional designation 1988 JU, is a background asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 9 May 1988, by astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California, United States. The asteroid was named after American chemist Candace Kohl.
1652 Hergé, provisional designation 1953 PA, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 9 August 1953, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, Belgium. It was later named after Belgian cartoonist Hergé.
3067 Akhmatova, provisional designation 1982 TE2, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.
1717 Arlon, provisional designation 1954 AC, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 8.5 kilometers in diameter.
2033 Basilea, provisional designation 1973 CA, is a stony asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 6 February 1973, by astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland. The asteroid was named for the Swiss city of Basel.
1338 Duponta, provisional designation 1934 XA, is a stony Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter.
1736 Floirac, provisional designation 1967 RA, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8.7 kilometer in diameter.
1777 Gehrels, also designated 4007 P-L, is a stony asteroid from the middle region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered during the Palomar–Leiden survey in 1960, and named for astronomer Tom Gehrels, one of the survey's principal investigators and credited discoverer.
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.
5333 Kanaya, provisional designation 1990 UH, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter.
1559 Kustaanheimo, provisional designation 1942 BF, is a stony asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 20 January 1942, by Finnish astronomer Liisi Oterma at the Iso-Heikkilä Observatory near Turku in southwest Finland. The asteroid was named after Finnish astronomer Paul Kustaanheimo (1924–1997).
2094 Magnitka (prov. designation: 1971 TC2) is a Flora asteroid from the inner regions of the asteroid belt, approximately 12 kilometers (7.5 miles) in diameter. It was discovered on 12 October 1971, at and by the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. The discovery has not been attributed to an observing astronomer. It was later named for the city of Magnitogorsk.
3066 McFadden, provisional designation 1984 EO, is a stony background asteroid from the central regions of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 1 March 1984, by American astronomer Edward Bowell at the Anderson Mesa Station near Tucson, Arizona. It was named for American planetary scientist Lucy-Ann McFadden. The assumed S-type asteroid has a rotation period of 13.8 hours.
1739 Meyermann, provisional designation 1939 PF, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 15 August 1939. It was later named in memory of astronomer Bruno Meyermann.
2815 Soma, provisional designation 1982 RL, is a binary Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 15 September 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona, in the United States. It is named for the mechanical puzzle Soma cube.
2478 Tokai, provisionally designated 1981 JC, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 4 May 1981, by Japanese astronomer Toshimasa Furuta at Tōkai Observatory, Japan. The asteroid was named after the city of Tōkai.
1608 Muñoz, provisional designation 1951 RZ, is a Flora asteroid from the inner regions of the asteroid belt, approximately 6.5 kilometers in diameter. It was discovered on 1 September 1951, by Argentine astronomer Miguel Itzigsohn at the La Plata Astronomical Observatory, in La Plata, Argentina. The S-type asteroid has a rotation period of 5.3 hours. It was named after F. A. Muñoz, one of the assistant astronomers at the discovering observatory.
1530 Rantaseppä, provisional designation 1938 SG, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. Discovered by Yrjö Väisälä at Turku Observatory in 1938, it was later named after Finnish astronomer Hilkka Rantaseppä-Helenius.