Discovery [1] | |
---|---|
Discovered by | M. P. Candy |
Discovery site | Perth Obs. |
Discovery date | 20 March 1980 |
Designations | |
(3893) DeLaeter | |
Named after | John Robert de Laeter [2] (Australian scientist) |
1980 FG12 ·1977 SX2 1984 KE | |
main-belt · Phocaea [3] Hungaria · background [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 39.52 yr (14,435 days) |
Aphelion | 3.0626 AU |
Perihelion | 1.7817 AU |
2.4221 AU | |
Eccentricity | 0.2644 |
3.77 yr (1,377 days) | |
255.66° | |
0° 15m 41.4s / day | |
Inclination | 23.080° |
196.76° | |
107.58° | |
Physical characteristics | |
Dimensions | 10.97±1.24 km [5] 11.38±3.31 km [6] 12.12±0.17 km [7] 12.786±0.102 km [8] 12.935±0.100 km [9] 13.95 km (calculated) [3] |
5.633±0.003 h [lower-alpha 1] 13.83±0.01 h [10] | |
0.0573±0.0025 [3] [9] 0.059±0.002 [7] 0.068±0.015 [8] 0.07±0.03 [5] 0.08±0.07 [6] | |
S (assumed) [3] | |
13.0 [3] [9] ·13.10 [6] ·13.2 [1] ·13.30 [7] ·13.31 [5] ·13.37±0.24 [11] | |
3893 DeLaeter, provisional designation 1980 FG12, is an asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 20 March 1980, by British astronomer Michael Candy at the Perth Observatory in Bickley, Australia. [12] The asteroid was named after Australian scientist John Robert de Laeter. [2]
DeLaeter is a non-family asteroid of the main belt's background population when applying the Hierarchical Clustering Method to its proper orbital elements. [4] The asteroid has also been considered a dynamical Hungaria asteroid and a member of the stony Phocaea family. [3] [10] It orbits the Sun in the inner main-belt at a distance of 1.8–3.1 AU once every 3 years and 9 months (1,377 days; semi-major axis of 2.42 AU). Its orbit has an eccentricity of 0.26 and an inclination of 23° with respect to the ecliptic. [1]
The asteroid was first identified as 1977 SX2 at Crimea–Nauchnij in September 1977. The body's observation arc begins with a precovery taken at Palomar Observatory in October 1977, or two and a half years prior to its official discovery observation at Bickley. [12]
DeLaeter is an assumed S-type asteroid, [3] which contradicts the low albedo measured by the space-based surveys (see below).
Photometric observations made by American astronomer Robert Stephens in June 2003 at the Santana Observatory ( 646 ) in Rancho Cucamonga, California, gave a synodic rotation period of 13.83 hours and a brightness variation of 0.33 magnitude ( U=2 ). [10] In May 2014, a lightcurve obtained by Brian Warner at the Palmer Divide Station ( U82 ) gave a divergent period of 5.633 hours with an amplitude of 0.13 ( U=2 ). [lower-alpha 1]
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, DeLaeter measures between 10.97 and 12.935 kilometers in diameter and its surface has an albedo between 0.0573 and 0.08. [5] [6] [7] [8] [9]
The Collaborative Asteroid Lightcurve Link adopts an albedo of 0.0573 and calculates a diameter of 13.95 kilometers based on an absolute magnitude of 13.0. [3]
This minor planet was named after Australian scientist John Robert de Laeter (1933–2010), who was a professor at Curtin University in Western Australia. His research included pioneering application of mass spectrometry and problems in the field of nuclear physics, cosmochemistry, geochronology, isotope geochemistry. He was also a supporter of the Perth Observatory where this asteroid was discovered. [2]
The official naming citation was published by the Minor Planet Center on 28 August 1996 ( M.P.C. 27733). [13]
4349 Tibúrcio, provisional designation 1989 LX, is a dark asteroid from the central region of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 5 June 1989, by German astronomer Werner Landgraf at ESO's La Silla Observatory in northern Chile.
515 Athalia, provisional designation 1903 ME, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 20 September 1903, by German astronomer Max Wolf at the Heidelberg Observatory in southwest Germany. The asteroid was named after the ancient Judahite queen Athaliah.
606 Brangäne, provisional designation 1906 VB, is an asteroid from the central regions of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 18 September 1906, by astronomer August Kopff at the Heidelberg Observatory in southwest Germany. The unusual K-type asteroid is the namesake of the small Brangäne family and has a rotation period of 12.3 hours. It was named after Brangaine, a character from the opera Tristan und Isolde by Richard Wagner.
997 Priska, provisional designation 1923 NR, is a carbonaceous Adeonian asteroid from the central regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 12 July 1923, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid's name is a common German female name, unrelated to the discoverer's contemporaries.
Arago, provisional designation 1923 OT, is a dark asteroid from the outer regions of the asteroid belt, approximately 55 kilometers in diameter. It was discovered on 5 September 1923, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after French mathematician François Arago.
Pawlowia, provisional designation 1923 OX, is a background asteroid from the central regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 5 October 1923, by Soviet astronomer Vladimir Albitsky at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after Russian physiologist and Nobelist Ivan Pavlov.
La Paz, provisional designation 1923 PD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 40 kilometers in diameter. It was discovered on 31 October 1923, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory and named after the city La Paz in Bolivia.
1092 Lilium, provisional designation 1924 PN, is a dark, carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 44 kilometers in diameter. It was discovered on 12 January 1924, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named after the flower Lilium.
1118 Hanskya is a large background asteroid, approximately 77 kilometers in diameter, located in the outer regions of the asteroid belt. Discovered by Sergey Belyavsky and Nikolaj Ivanov in 1927, it was named after Russian astronomer Aleksey Hansky. The presumed dark C-type asteroid has a rotation period of 15.6 hours.
1132 Hollandia, provisional designation 1929 RB1, is a stony asteroid from the middle region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 13 September 1929, by Dutch astronomer Hendrik van Gent at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. It was named for the region Holland in the Netherlands.
1159 Granada, provisional designation 1929 RD, is a dark background asteroid and relatively slow rotator from the inner regions of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 2 September 1929, by astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named for the Spanish city and province of Granada.
1567 Alikoski, provisional designation 1941 HN, is a rare-type carbonaceous asteroid from the outer region of the asteroid belt, approximately 67 kilometers in diameter. It was discovered on 22 April 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It was later named after Finnish astronomer Heikki Alikoski.
1295 Deflotte, provisional designation 1933 WD, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 48 kilometers in diameter. It was discovered on 25 November 1933, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. The asteroid was named after the discoverer's nephew.
2126 Gerasimovich, provisional designation 1970 QZ, is a stony background asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 30 August 1970, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. The asteroid was named after Russian astronomer Boris Gerasimovich.
2012 Guo Shou-Jing, provisional designation 1964 TE2, is a carbonaceous asteroid and Florian interloper from the inner regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 9 October 1964, by astronomers at the Purple Mountain Observatory in Nanking, China. The asteroid was named after Chinese astronomer Guo Shoujing.
1524 Joensuu, provisional designation 1939 SB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 42 kilometers in diameter. It was discovered on 18 September 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named for the town of Joensuu.
2173 Maresjev, provisional designation 1974 QG1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 28 kilometers (17 miles) in diameter. It was discovered on 22 August 1974, by Soviet–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. It was named for Soviet war veteran Alexey Maresyev. The assumed C-type asteroid has a tentative rotation period of 11.6 hours.
1303 Luthera, provisional designation 1928 FP, is a dark asteroid and the parent body of the Luthera family, located in the outermost regions of the asteroid belt. It measures approximately 90 kilometers in diameter. The asteroid was discovered on 16 March 1928, by astronomer Friedrich Schwassmann at the Bergedorf Observatory in Hamburg, Germany, and later named after German astronomer Robert Luther.
2043 Ortutay, provisional designation 1936 TH, is a dark asteroid from the outer regions of the asteroid belt, approximately 45 kilometers in diameter. The asteroid was discovered by Hungarian astronomer György Kulin at the Konkoly Observatory, Budapest, on 12 November 1936. It was named after Hungarian ethnographer Gyula Ortutay.
1302 Werra, provisional designation 1924 SV, is a Themistian asteroid from the outer regions of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 28 September 1924, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named for the river Werra in central Germany.