Discovery [1] | |
---|---|
Discovered by | H. van Gent |
Discovery site | Johannesburg Obs. |
Discovery date | 13 February 1935 |
Designations | |
(1353) Maartje | |
Named after | Maartje Mekking [2] (daughter of Dutch orbit computer B. G. Mekking) |
1935 CU ·1931 ME 1953 TZ2 ·A910 LB A916 QB ·A920 JC | |
main-belt ·(outer) Eos [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 97.48 yr (35,606 days) |
Aphelion | 3.2988 AU |
Perihelion | 2.7210 AU |
3.0099 AU | |
Eccentricity | 0.0960 |
5.22 yr (1,907 days) | |
134.16° | |
0° 11m 19.32s / day | |
Inclination | 9.2032° |
211.79° | |
98.471° | |
Physical characteristics | |
Dimensions | 33.75±3.9 km [5] 34.16 km (derived) [3] 37.16±10.25 km [6] 38.13±0.79 km [7] 39.013±0.534 km [8] 39.55±0.68 km [9] 42.175±0.390 km [10] |
12 h [11] 18 h [11] 22.930±0.001 h (best) [12] 22.98±0.05 h [11] 22.9924±0.0002 h [13] [lower-alpha 1] 22.9926 h [14] | |
0.0687±0.0045 [10] 0.088±0.004 [7] 0.1073±0.030 [5] 0.13±0.06 [6] 0.136±0.015 [9] 0.1660 (derived) [3] | |
L S [15] · S (assumed) [3] | |
9.80 [9] ·9.9 [3] ·10.0 [1] ·10.01 [6] ·10.01±0.09 [15] ·10.40 [5] [7] [10] | |
1353 Maartje, provisional designation 1935 CU, is an Eoan asteroid from the outer regions of the asteroid belt, approximately 37 kilometers in diameter. It was discovered on 13 February 1935, by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa. [16] The asteroid was named after Maartje Mekking, daughter of a staff member at the Dutch Leiden Observatory. [2]
Maartje is a member the Eos family ( 606 ), [3] [4] the largest asteroid family in the outer main belt consisting of nearly 10,000 known members. [17] : 23 It orbits the Sun at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,907 days; semi-major axis of 3.01 AU). Its orbit has an eccentricity of 0.10 and an inclination of 9° with respect to the ecliptic. [1]
In June 1910, the asteroid was first identified as A910 LB at the Heidelberg Observatory in Germany, where the body's observation arc begins with its identification as A920 JC in May 1920, almost 15 years prior to its official discovery observation at Johannesburg. [16]
This minor planet was named after Maartje (Nin) Maria Lindenburg Mekking (1924–2007), daughter of B. G. Mekking (1903–1971), an orbit computer at the Leiden Observatory. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 123 ). [2]
Maartje has been characterized as an L- and S-type asteroid by PanSTARRS photometric survey, [15] while the overall spectral type of the Eos family is that of a K-type. [17] : 23
Several rotational lightcurve of Maartje have been obtained from photometric observations since 2005. [11] [12] Lightcurve analysis gave a consolidated, slightly longer-than average, and well-defined rotation period of 22.930 hours with a brightness amplitude between 0.25 and 0.46 magnitude ( U=3 ). [3] The asteroid's lightcurve has also been modeled and gave two concurring periods of 22.9924 and 22.9926 hours. [13] [14] [lower-alpha 1] Modeling in 2018 determined two spin axis of (285.0°, 73.0°) and (119.0°, 41.0°) in ecliptic coordinates (λ, β). [13]
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, Maartje measures between 33.75 and 42.175 kilometers in diameter and its surface has an albedo between 0.0687 and 0.136. [5] [6] [7] [8] [9] [10]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1660 and a diameter of 34.16 kilometers based on an absolute magnitude of 9.9. [3]
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.
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.
1178 Irmela, provisional designation 1931 EC, is a stony asteroid from the middle regions of the asteroid belt, approximately 19 kilometers in diameter.
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.
6433 Enya, provisional designation 1978 WC, is a stony background asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 18 November 1978, by Czech astronomer Antonín Mrkos at the Kleť Observatory in the Czech Republic. It was named for Irish musician Enya.
1096 Reunerta, provisional designation 1928 OB, is an asteroid from the background population of the asteroid belt's central region, approximately 40 kilometers in diameter. It was discovered on 21 July 1928, by astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa. The asteroid was named after South African engineer Theodore Reunert, supporter of the observatory and friend of the discoverer.
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.
1151 Ithaka, provisional designation 1929 RK, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in 1929, and later named for the Greek island of Ithaca.
1541 Estonia, provisional designation 1939 CK, is an asteroid from the central regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 12 February 1939, by astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory near Turku, Finland. The asteroid was named after the Baltic country of Estonia.
2571 Geisei, provisional designation 1981 UC, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered by Japanese astronomer Tsutomu Seki at Geisei Observatory on 23 October 1981, and named for the Japanese village of Geisei.
2324 Janice, provisional designation 1978 VS4, is a dark background asteroid from the outer regions of the asteroid belt, approximately 25 kilometers (16 miles) in diameter. It was discovered on 7 November 1978, by American astronomers Eleanor Helin and Schelte Bus at the Palomar Observatory in California. The asteroid was named for Janice Cline at Caltech. The presumably C-type asteroid has a rotation period of 23.2 hours.
1284 Latvia, provisional designation 1933 OP, is a rare-type asteroid from the middle region of the asteroid belt, approximately 37 kilometers in diameter. It was discovered on 27 July 1933, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after the Republic of Latvia.
1383 Limburgia, provisional designation 1934 RV, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Leiden Southern Station, annex to the Johannesburg Observatory in South Africa. It is named for the Dutch province Limburg.
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.
1405 Sibelius, provisional designation 1936 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The asteroid was named after composer Jean Sibelius.
7776 Takeishi, provisional designation 1993 BF, is a background asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 20 January 1993, by Japanese astronomer Takeshi Urata at the Nihondaira Observatory in Japan. The assumed S-type asteroid has a rotation period of 8.9 hours. It was named after Japanese amateur astronomer Masanori Takeishi.
1323 Tugela, provisional designation 1934 LD, is a dark background asteroid from the outer regions of the asteroid belt, approximately 60 kilometers in diameter. It was discovered on 19 May 1934, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the Tugela River in western South Africa.
1585 Union, provisional designation 1947 RG, is a dark background asteroid from the outer regions of the asteroid belt, approximately 52 kilometers in diameter. It was discovered on 7 September 1947, by South African astronomer Ernest Johnson at the Union Observatory in Johannesburg, South Africa. The asteroid was named after the discovering observatory.
3823 Yorii, provisional designation 1988 EC1, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 11 kilometers in diameter.
4760 Jia-xiang, provisional designation 1981 GN1, is a background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers (3 miles) in diameter. It was discovered on 1 April 1981, by astronomers at Harvard University's Oak Ridge Observatory in Massachusetts, United States. The presumed stony S-type asteroid was named after Chinese astronomer Zhang Jiaxiang. It has a rotation period of 14.96 hours.