Discovery [1] | |
---|---|
Discovered by | A. Kopff |
Discovery site | Heidelberg Obs. |
Discovery date | 4 October 1907 |
Designations | |
(3133) Sendai | |
Named after | Sendai (Japanese city) [2] |
A907 TC ·1968 TO 1973 DN ·1981 UX 1984 QG1 ·A907 XA | |
main-belt · Flora [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 109.19 yr (39,882 days) |
Aphelion | 2.5314 AU |
Perihelion | 1.8299 AU |
2.1806 AU | |
Eccentricity | 0.1608 |
3.22 yr (1,176 days) | |
44.618° | |
0° 18m 21.96s / day | |
Inclination | 6.5666° |
37.160° | |
358.26° | |
Physical characteristics | |
Dimensions | 7.25±0.30 km [4] 7.47 km (calculated) [3] 8.323±0.066 km [5] |
5.7491±0.0008 h [6] 5.776±0.005 h [lower-alpha 1] | |
0.2131±0.0373 [5] 0.24 (assumed) [3] 0.307±0.039 [4] | |
S [3] | |
12.8 [1] [3] ·12.7 [5] ·12.7 [4] ·12.522±0.001(R) [6] ·12.92±0.21 [7] | |
3133 Sendai, provisional designation A907 TC, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 4 October 1907, by German astronomer August Kopff at Heidelberg Observatory in southwest Germany. [8] The asteroid was named for the Japanese city of Sendai. [2]
Sendai is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 1.8–2.5 AU once every 3 years and 3 months (1,176 days). Its orbit has an eccentricity of 0.16 and an inclination of 7° with respect to the ecliptic. [1]
Sendai has been characterized as a stony S-type asteroid. [3]
According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer and its extended NEOWISE mission, the asteroid's surface has an albedo of 0.21 and 0.31, with a diameter of 8.3 and 7.3 kilometers, respectively. [4] [5] The Collaborative Asteroid Lightcurve Link assumes an intermediate albedo of 0.24 – which derives from 8 Flora, the largest member and namesake of this orbital family – and calculates a concurring diameter of 7.5 kilometers. [3]
In 2010, two rotational lightcurves were obtained by amateur astronomer Ralph Megna at Goat Mountain Astronomical Research Station (G79), and by the U.S. Palomar Transient Factory in California. The concurring lightcurves showed a rotation period of 5.776±0.005 and 5.7491±0.0008 hours, respectively ( U=3-/2 ). [lower-alpha 1] [6]
This minor planet was named for the second largest city north of Tokyo, Sendai (pop. 1 million), location of the Tōhoku University. It is the home of the Sendai Astronomical Observatory, which was founded in 1955, on appeal by the Sendai Amateur Astronomical Association. The observatory has discovered several minor planets. [2] The official naming citation was published by the Minor Planet Center on 29 September 1985 (M.P.C. 10045). [9]
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.
1554 Yugoslavia, provisional designation 1940 RE, is a stony Eunomian asteroid from the middle region of the asteroid belt, approximately 16 kilometres (9.9 mi) in diameter. It was discovered by Serbian astronomer Milorad Protić at Belgrade Astronomical Observatory, Serbia, on 6 September 1940. It was named for the former country of Yugoslavia.
1117 Reginita is a stony background asteroid from the inner regions of the asteroid belt. It was discovered on 24 May 1927, by Catalan astronomer Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain, who named it after his niece. The bright S-type asteroid has a notably short rotation period of 2.9 hours and measures approximately 10 kilometers in diameter.
1147 Stavropolis is a stony background asteroid from the inner regions of the asteroid belt. It was discovered on 11 June 1929, by Georgian–Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The S-type asteroid has a rotation period of 5.7 hours and measures approximately 14 kilometers in diameter. It was named after the Russian city of Stavropol.
19741 Callahan, provisional designation 2000 AN141, is a stony background asteroid from the inner regions of the asteroid belt, approximately 3.5 kilometers in diameter.
2751 Campbell, provisional designation 1962 RP, is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.
9423 Abt, provisional designation 1996 AT7, is a stony background asteroid from the central region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 12 January 1996, by the Spacewatch project of the University of Arizona at Kitt Peak National Observatory, United States. The asteroid was named after American astronomer Helmut Abt.
6349 Acapulco, provisional designation 1995 CN1, is a dark Adeonian asteroid from the middle region of the asteroid belt, approximately 22 kilometers in diameter.
3181 Ahnert, provisional designation 1964 EC, is a stony Flora asteroid from the inner regions of the asteroid belt, about 8 kilometers in diameter. It was discovered by German astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, eastern Germany, on 8 March 1964.
3787 Aivazovskij (prov. designation: 1977 RG7) is a stony asteroid of the Itha family, located in the outer region of the asteroid belt. It was discovered by Soviet–Russian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula, on 11 September 1977. The stony S-type asteroid has a rotation period of 3.0 hours and measures approximately 13 kilometers (8.1 miles) in diameter. It was named after painter Ivan Aivazovsky (1817–1900).
17119 Alexisrodrz, provisional designation 1999 JP59, is a stony background asteroid from the central region of the asteroid belt, approximately 4 kilometers in diameter.
2175 Andrea Doria, provisional designation 1977 TY, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter.
3936 Elst, provisional designation 2321 T-3, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. The asteroid was discovered on 16 October 1977, by Dutch astronomer couple Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Dutch–American astronomer Tom Gehrels at Palomar Observatory in California, United States. It was named after Belgian astronomer Eric W. Elst.
1346 Gotha, provisional designation 1929 CY, is a stony background asteroid from the central regions of the asteroid belt, approximately 14 kilometers (8.7 mi) in diameter. It was discovered on 5 February 1929, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The presumed S-type asteroid has a short rotation period of 2.6 hours. It was named for the German city of Gotha, located in Thuringia.
1527 Malmquista, provisional designation 1939 UG, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter.
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.
2111 Tselina is a stony Eos asteroid from the outer regions of the asteroid belt. It was discovered on 13 June 1969, by Soviet astronomer Tamara Smirnova at Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. The S-type asteroid has a rotation period of 6.6 hours and measures approximately 23 kilometers in diameter. It was later named after the Soviet Virgin Lands Campaign.
23712 Willpatrick, provisional designation 1998 AA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5 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.
14436 Morishita, provisional designation 1992 FC2, is a stony background asteroid and exceptionally slow rotator from the middle region of the asteroid belt, approximately 5 kilometers in diameter.