Discovery [1] | |
---|---|
Discovered by | E. Bowell |
Discovery site | Anderson Mesa Stn. |
Discovery date | 30 December 1981 |
Designations | |
(3247) Di Martino | |
Named after | Mario di Martino [1] (Italian astronomer) |
1981 YE ·1968 HR 1979 HO1 ·A909 BL | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 109.09 yr (39,844 d) |
Aphelion | 2.6824 AU |
Perihelion | 2.0727 AU |
2.3776 AU | |
Eccentricity | 0.1282 |
3.67 yr (1,339 d) | |
229.54° | |
0° 16m 7.68s / day | |
Inclination | 3.9342° |
45.601° | |
146.34° | |
Physical characteristics | |
Mean diameter | 11.267±2.644 km [6] 11.74±3.06 km [7] 12.42±2.19 km [8] 13.60±5.23 km [9] 13.72 km(derived) [3] 13.75±1.0 km [10] 15.60±0.51 km [11] |
5.443±0.0014 h [12] 5.4446±0.0007 h [13] 5.445 h [14] 5.44517±0.00005 h [15] | |
Pole ecliptic latitude | |
0.05±0.10 [8] 0.053±0.004 [11] 0.0540(derived) [3] 0.060±0.060 [9] 0.0647±0.011 [10] 0.08±0.09 [7] 0.0925±0.0544 [6] | |
S (assumed) [3] | |
12.90 [10] [11] 13.00 [7] [9] 13.1 [2] [3] 13.116±0.003(R) [12] 13.26 [6] 13.51 [8] | |
3247 Di Martino (prov. designation: 1981 YE) is a dark Nysa family asteroid from the inner regions of the asteroid belt. It was discovered on 30 December 1981, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, in the United States. [1] The asteroid has a rotation period of 5.4 hours and measures approximately 13 kilometers (8 miles) in diameter. [3] It was named for Italian astronomer Mario di Martino. [1]
Di Martino is member of the Nysa–Polana complex ( 405 ), [4] [5] one of the largest asteroid families. [16] Its low albedo (see below) it likely belongs to the Polana family within the larger Nysa–Polana complex. The asteroid orbits the Sun in the inner main-belt at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,339 days; semi-major axis of 2.38 AU). Its orbit has an eccentricity of 0.13 and an inclination of 4° with respect to the ecliptic. [2] The body's observation arc begins with its first observation as A909 BL at Heidelberg Observatory in January 1909, almost 73 years prior to its official discovery observation at Anderson Mesa. [1]
This minor planet was named after Mario di Martino (born 1947), Italian astronomer and photometrist of lightcurves at the Turin Observatory. The official naming proposed by the discoverer. The citation was prepared by Alain Harris and published by the Minor Planet Center on 14 April 1987 ( M.P.C. 11749). [17]
Di Martino is an assumed S-type asteroid, [3] while its low albedo indicates a carbonaceous composition.
Three rotational lightcurve of Di Martino have been obtained from photometric observations by French amateur astronomer Pierre Antonini and at the Palomar Transient Factory and Haute Provence Observatory ( U=2/3/3 ). [12] [13] [14] Lightcurve analysis gave a rotation period of 5.445 hours with a consolidated brightness amplitude between 0.32 and 0.51 magnitude ( U=2/3/3 ), indicative of a somewhat elongated shape. [3]
In 2016, a modeled lightcurve gave a concurring sidereal period of 5.44517 hours using photometric data from a large international collaboration of astronomers. The study also determined two spin axes of (53.0°, −70.0°) and (231.0°, −75.0°) in ecliptic coordinates (λ, β). [15]
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Di Martino measures between 11.267 and 15.60 kilometers in diameter and its surface has an albedo between 0.05 and 0.0925. [6] [7] [8] [9] [10] [11] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0540 and a diameter of 13.72 kilometers based on an absolute magnitude of 13.1. [3]
Maja is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 71 kilometers in diameter. It was discovered on 9 April 1861, by American astronomer Horace Tuttle at the Harvard College Observatory in Cambridge, Massachusetts, United States. The asteroid was named after Maia from Greek mythology.
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.
1743 Schmidt, provisional designation 4109 P-L, is a dark background asteroid from the inner regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered during the Palomar–Leiden survey on 24 September 1960, by astronomers Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Tom Gehrels at Palomar Observatory in California. The C-type asteroid has a rotation period of 17.5 hours. It was named for the optician Bernhard Schmidt.
1024 Hale, provisional designation A923 YO13, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 45 kilometers (28 miles) in diameter. The asteroid was discovered on 2 December 1923, by Belgian–American astronomer George Van Biesbroeck at the Yerkes Observatory in Wisconsin, United States. It was named for American astronomer George Ellery Hale. The dark C-type asteroid may have a rotation period of 16 hours.
1039 Sonneberga, provisional designation 1924 TL, is a dark background asteroid, approximately 34 kilometers in diameter, located in the central region of the asteroid belt. It was discovered on 24 November 1924, by German astronomer Max Wolf at Heidelberg Observatory in southwest Germany. The asteroid was named for the German city of Sonneberg, where the Sonneberg Observatory is located.
1214 Richilde, provisional designation 1932 AA, is a dark background asteroid from the central regions of the asteroid belt, approximately 35 kilometers in diameter. It was discovered by Max Wolf at Heidelberg Observatory in 1932. Any reference of the asteroid's name to a person is unknown.
1031 Arctica, provisional designation 1924 RR, is a dark asteroid from the outer region of the asteroid belt, approximately 75 kilometers in diameter. It was discovered on 6 June 1924, by Soviet−Russian astronomer Sergey Belyavsky at Simeiz Observatory on the Crimean peninsula. It was named for the Arctic Sea.
1054 Forsytia is a dark background asteroid, approximately 46 kilometers in diameter, from the outer regions of the asteroid belt. It was discovered on 20 November 1925, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany and assigned provisional designation 1925 WD. It is named after the flowering plant forsythia, and marks the beginning of a sequence of 28 thematically named asteroids by the discoverer.
1114 Lorraine, provisional designation 1928 WA, is a very dark background asteroid from the outer regions of the asteroid belt, approximately 70 kilometers in diameter. It was discovered by Alexandre Schaumasse at Nice Observatory in 1928, and named for the French region of Lorraine.
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.
1240 Centenaria, provisional designation 1932 CD, is a background asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. It was discovered on 5 February 1932, by astronomer Richard Schorr at the Bergedorf Observatory in Hamburg, Germany. The assumed C-type asteroid has a rotation period of 11.3 hours. It was named for the 100th anniversary of the discovering observatory.
1241 Dysona, provisional designation 1932 EB1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 77 kilometers in diameter. It was discovered on 4 March 1932, by English astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa. The asteroid was named after English astronomer Frank Watson Dyson.
4282 Endate, provisional designation 1987 UQ1, is an asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 28 October 1987, by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at Kushiro Observatory (399) in Japan. It was named for amateur astronomer Kin Endate.
1267 Geertruida, provisional designation 1930 HD, is a carbonaceous background asteroid from the inner regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by astronomer Hendrik van Gent at Johannesburg Observatory in 1930, the asteroid was later named after Geertruid Pels, sister of Dutch astronomer Gerrit Pels.
1726 Hoffmeister, provisional designation 1933 OE, is a carbonaceous asteroid and namesake of the Hoffmeister family from the central region of the asteroid belt, approximately 23 kilometers in diameter.
1469 Linzia, provisional designation 1938 QD, is a dark asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1938, the asteroid was later named after the Austrian city of Linz.
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.
1347 Patria, provisional designation 1931 VW, is a carbonaceous asteroid from the background population of the central asteroid belt, approximately 32 kilometers in diameter. It was discovered on 6 November 1931, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The asteroid was named for the Latin word of fatherland.
1692 Subbotina, provisional designation 1936 QD, is a dark background asteroid from the central region of the asteroid belt, approximately 37 kilometers in diameter. The carbonaceous Cg-type asteroid has a rotation period of 9.2 hours. It was discovered by Grigory Neujmin at the Crimean Simeiz Observatory in 1936, and later named after Soviet mathematician and astronomer Mikhail Subbotin.
1186 Turnera, provisional designation 1929 PL, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 1 August 1929, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was later named after British astronomer Herbert Hall Turner.