Discovery [1] | |
---|---|
Discovered by | J. A. Bruwer |
Discovery site | Johannesburg Obs. |
Discovery date | 13 July 1953 |
Designations | |
(1658) Innes | |
Named after | Robert T. A. Innes (astronomer) [2] |
1953 NA ·1940 GB 1948 EM ·1949 QA 1953 OF ·1953 PN 1957 OE | |
main-belt ·(middle) | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 77.08 yr (28,155 days) |
Aphelion | 3.0302 AU |
Perihelion | 2.0866 AU |
2.5584 AU | |
Eccentricity | 0.1844 |
4.09 yr (1,495 days) | |
247.27° | |
0° 14m 27.24s / day | |
Inclination | 9.0941° |
95.441° | |
188.76° | |
Physical characteristics | |
Dimensions | 13.352±0.140 km [3] 13.54±1.17 km [4] 14.082±0.042 km [5] 14.76 km (calculated) [6] |
3.191±0.001 h [7] [8] | |
0.20 (assumed) [6] 0.2241±0.0369 [5] 0.248±0.019 [3] 0.626±0.318 [4] | |
B–V = 0.960 [1] U–B = 0.610 [1] Tholen = AS [1] · AS [6] | |
11.27±0.41 [9] ·10.47 [4] ·11.52 [1] [6] [5] | |
1658 Innes, provisional designation 1953 NA, is a rare-type asteroid from the middle region of the asteroid belt, approximately 15 kilometers in diameter. It was named after Robert T. A. Innes.
Innes was discovered on 13 July 1953, by South African astronomer Jacobus Bruwer at Johannesburg Observatory in South Africa. [10]
It was the first numbered discovery of astronomer Jacobus Bruwer. In addition, he also discovered the minor planets 1660 Wood, 1794 Finsen, and 3284 Niebuhr. The asteroid 1811 Bruwer was named in his honour by the Dutch, Dutch-American astronomer trio of the Palomar–Leiden survey. [11]
It orbits the Sun in the central main-belt at a distance of 2.1–3.0 AU once every 4 years and 1 month (1,495 days). Its orbit has an eccentricity of 0.18 and an inclination of 9° with respect to the ecliptic. [1] Innes was first identified as 1940 GB at Turku Observatory in 1940, extending the body's observation arc by 13 years prior to its official discovery observation. [10]
In the Tholen taxonomy, Innes has an AS-spectral type, an intermediate form of the rare A-types to the common stony asteroids (also see category listing). [12]
In May 2005, astronomers Robert Stephens at the Center for Solar System Studies, California, and Lorenzo Franco at Balzaretto Observatory, near Rome, each obtained a rotational lightcurve of Innes. The photometric observations gave an identical rotation period of 3.191±0.001 hours with a brightness variation of 0.22 and 0.25 magnitude, respectively ( U=3/3 ). [7] [8]
According to the 2014-revised survey result of NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Innes measures 13.35 kilometers in diameter and its surface has an albedo of 0.248, [3] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 14.76 kilometers with an absolute magnitude of 11.52. [6]
This minor planet was named for Scottish–South African astronomer Robert T. A. Innes (1861–1933), first director of the discovering Union Observatory from 1903 to 1927 (originally named Transvaal Observatory). He was a skilled observational astronomer, famous for his deliberate search and discovery of the nearest star, Proxima Centauri, in 1915. He also made important theoretical and computational contributions to celestial mechanics and to the irregular rotation of the Earth. The astronomer is also honored by the lunar crater Innes . [2] The official naming citation was published by the Minor Planet Center on 1 July 1972 ( M.P.C. 3297). [13]
1033 Simona, provisional designation 1924 SM, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. The asteroid was discovered by George Van Biesbroeck in 1924, who named it after his daughter Simona.
1049 Gotho, provisional designation 1925 RB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 53 kilometers in diameter. It was discovered on 14 September 1925, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. Although the name of the asteroid is a masculine German name, it is not known to refer to a particular individual.
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.
1617 Alschmitt, provisional designation 1952 FB, is an assumed carbonaceous asteroid from in the outer parts of the main belt, approximately 30 kilometers in diameter. It was discovered on 20 March 1952, by French astronomer Louis Boyer at Algiers Observatory in Algeria, Northern Africa, and named after French astronomer Alfred Schmitt.
2839 Annette is a bright Flora asteroid from the inner regions of the asteroid belt. It was discovered on 5 October 1929, by American astronomer Clyde Tombaugh at Lowell Observatory during his search for Pluto. The presumed S-type asteroid has a rotation period of 10.5 hours and measures approximately 5 kilometers in diameter. It was named after the discoverer's daughter.
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.
1710 Gothard, provisional designation 1941 UF, is a stony asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 20 October 1941, by Hungarian astronomer György Kulin at the Konkoly Observatory in Budapest, Hungary. It was later named after Hungarian amateur astronomer Jenő Gothard.
1233 Kobresia, provisional designation 1931 TG2, is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 33 kilometers in diameter. It was discovered on 10 October 1931, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named for the grass-like flowering plant Kobresia, a genus in the sedge family.
1771 Makover, provisional designation 1968 BD, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 50 kilometers in diameter.
1607 Mavis, provisional designation 1950 RA, is a stony asteroid from the central region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 3 September 1950, by South African astronomer Ernest Johnson at Johannesburg Observatory in South Africa. It was later named after the wife of astronomer Jacobus Bruwer.
2056 Nancy, provisional designation A909 TB, is a stony background asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 15 October 1909, by German astronomer Joseph Helffrich at Heidelberg Observatory in southwest Germany. The S-type asteroid has a tentative rotation period of 15.0 hours. It was named for Nancy Marsden, wife of British astronomer Brian G. Marsden.
1907 Rudneva, provisional designation 1972 RC2, is a stony background asteroid from the central regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 11 September 1972, by astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula. The asteroid was named after Soviet geodesist and war hero Yevgeniya Rudneva.
1854 Skvortsov (prov. designation: 1968 UE1) is a stony background asteroid and relatively slow rotator from the middle region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 22 October 1968, by Russian astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula. It is named after astronomer Evgenii Skvortsov.
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.
1704 Wachmann, provisional designation A924 EE, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 7 March 1924. It was later named after astronomer Arno Wachmann.
1660 Wood, provisional designation 1953 GA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was named after British–South African astronomer Harry Edwin Wood.
3823 Yorii, provisional designation 1988 EC1, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 11 kilometers in diameter.
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.
1542 Schalén, provisional designation 1941 QE, is a background asteroid from the outer region of the asteroid belt, approximately 45 kilometers in diameter. It was discovered on 26 August 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The dark D-type asteroid was later named after Swedish astronomer Karl Schalén.
1632 Sieböhme, provisional designation 1941 DF, is an asteroid and relatively slow rotator from the middle region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 26 February 1941, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was later named after ARI-astronomer Siegfried Böhme.