Discovery | |
---|---|
Discovered by | Max Wolf |
Discovery date | 1 March 1894 |
Designations | |
(386) Siegena | |
Pronunciation | /ˈsiːɡənə/ SEE-gə-nə [1] |
Named after | Siegen |
1894 AY | |
Main belt | |
Adjectives | Siegenian /siːˈɡɛniən/ see-GHEN-ee-ən [2] |
Orbital characteristics [3] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 122.08 yr (44590 d) |
Aphelion | 3.38983 AU (507.111 Gm) |
Perihelion | 2.40159 AU (359.273 Gm) |
2.89571 AU (433.192 Gm) | |
Eccentricity | 0.17064 |
4.93 yr (1799.8 d) | |
66.7510° | |
0° 12m 0.068s / day | |
Inclination | 20.2568° |
166.886° | |
219.478° | |
Physical characteristics | |
Dimensions | 165.01±2.7 km [3] 170.35 ± 8.40 km [4] |
Mass | (8.14 ± 1.58) × 1018 kg [4] |
Mean density | 3.14 ± 0.76 g/cm3 [4] |
9.763 h (0.4068 d) | |
0.0692±0.002 | |
C | |
7.43 | |
Siegena (minor planet designation: 386 Siegena) is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material.
It was discovered by Max Wolf on March 1, 1894, in Heidelberg.
During 1999, the asteroid was observed occulting a star. The resulting chords provided a diameter estimate of 174 km. [5]
Bellona is a large main-belt asteroid. It was discovered by German astronomer R. Luther on March 1, 1854, and named after Bellōna, the Roman goddess of war; the name was chosen to mark the beginning of the Crimean War. Its historical symbol was Bellona's whip and spear; it is in the pipeline for Unicode 17.0 as U+1CECE .
Sappho is a large, S-type (stony) main-belt asteroid. It was discovered by English astronomer Norman Pogson on May 2, 1864, and is named after Sappho, the Archaic Greece poet. The asteroid is orbiting the Sun at a distance of 2.2957 AU with a period of 3.48 years and an eccentricity (ovalness) of 0.2. The orbital plane is inclined at an angle of 8.68° to the plane of the ecliptic.
Aurora is one of the largest main-belt asteroids. With an albedo of only 0.04, it is darker than soot, and has a primitive composition consisting of carbonaceous material. It was discovered by J. C. Watson on September 6, 1867, in Ann Arbor, and named after Aurora, the Roman goddess of the dawn.
Hera is a moderately large main-belt asteroid with an orbital period of 4.44 years. It was discovered by Canadian-American astronomer James Craig Watson on September 7, 1868, and named after Hera, queen and fifth in power of the Olympian gods in Greek mythology. This is a stony S-type asteroid with a silicate surface composition.
Nemesis is a large 180 km main-belt asteroid, of carbonaceous composition. It rotates rather slowly, taking about 78 hours to complete one rotation. Nemesis is the largest member of the Nemesian asteroid family bearing its name. It was discovered by J. C. Watson on 25 November 1872, and named after Nemesis, the goddess of retribution in Greek mythology.
165 Loreley is a main-belt asteroid that was discovered by C. H. F. Peters on August 9, 1876, in Clinton, New York and named after the Lorelei, a figure in German folklore.
168 Sibylla is a large main-belt asteroid, discovered by Canadian-American astronomer J. C. Watson on September 28, 1876. It was most likely named for the Sibyls, referring to the Ancient Greek female oracles. Based upon its spectrum this object is classified as a C-type asteroid, which indicates it is very dark and composed of primitive carbonaceous materials. 168 Sibylla is a Cybele asteroid, orbiting beyond most of the main-belt asteroids.
196 Philomela is a large and bright main-belt asteroid. It is an S-type asteroid.
Isabella is a large and dark asteroid from the central asteroid belt, approximately 80 kilometers in diameter. It was discovered in Pola by Johann Palisa on 12 November 1879. The origin of the name is unknown. The asteroid is probably composed of material similar to carbonaceous chondrites. It is classified as a member of the Nemesis family of asteroids.
Eos is a large main-belt asteroid that was discovered by Austrian astronomer Johann Palisa on January 18, 1882, in Vienna. In 1884, it was named after Eos, the Greek goddess of the dawn, to honour the opening of a new observatory that was hoped to bring about a new dawn for Viennese astronomy.
Eukrate is a rather large main-belt asteroid. It is dark and probably a primitive carbonaceous body. The asteroid was discovered by Robert Luther on March 14, 1885, in Düsseldorf. It was named after Eucrate, a Nereid in Greek mythology.
Regina is a typical, although fairly large, Main belt asteroid. It was discovered by Auguste Charlois on 3 August 1889 in Nice, France. The asteroid is a suspected interloper in the Eucharis asteroid family.
Palma is one of the largest main-belt asteroids. It is a B-type asteroid.
Aeolia is a typical main belt asteroid. It was discovered by the French astronomer Auguste Charlois on 1 December 1894 from Nice, and may have been named for the ancient land of Aeolis. The asteroid is orbiting the Sun at a distance of 2.74 AU with a period of 4.54 years and an eccentricity (ovalness) of 0.16. The orbital plane is inclined at an angle of 2.5° to the plane of the ecliptic. This is the largest member of the eponymously named Aeolia asteroid family, a small group of asteroids with similar orbits that have an estimated age of less than 100 million years.
679 Pax is a minor planet orbiting the Sun that was discovered by German astronomer August Kopff on January 28, 1909. It is named after Pax, a Roman goddess. It is orbiting the Sun with a period of 4.16 years and an eccentricity of 0.31.
727 Nipponia is a minor planet orbiting the Sun. It is a member of the Maria family of asteroids.
729 Watsonia is a rare-type asteroid and namesake of the Watsonia family from the central region of the asteroid belt. It was named after the Canadian-American astronomer James C. Watson. Watsonia occulted the star 54 Leonis on 2013 Mar 03 at 01:48.
758 Mancunia is a minor planet orbiting the Sun. It was discovered in 1912 from Johannesburg by H. E. Wood, a Mancunian. This object is orbiting at a distance of 3.19 AU with a period of 5.70 years and an eccentricity (ovalness) of 0.15. The orbital plane is inclined at an angle of 5.61° to the plane of the ecliptic.
804 Hispania is a minor planet orbiting the Sun. It was discovered from Barcelona (Spain) on 20 March 1915 by Josep Comas Solá (1868–1937), the first asteroid to be discovered by a Spaniard.
875 Nymphe is a minor planet orbiting the Sun. It is a member of the Maria family of asteroids.