Hamiltonia (

minor planet designation A formal minor-planet designation is, in its final form, a number–name combination given to a minor planet (asteroid, centaur, trans-Neptunian object and dwarf planet but not comet). Such designation always features a leading number (catalog or ...

: 452 Hamiltonia) is an

asteroid An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere. ...

. It was discovered by

James Edward Keeler James Edward Keeler (September 10, 1857 – August 12, 1900) was an American astronomer. He was an early observer of galaxies using photography, as well as the first to show observationally that the rings of Saturn do not rotate as a solid body ...

on 6 December 1899, but was then lost until 1981. Its provisional name was 1899 FD. The asteroid is named for Mount Hamilton, the site of

Lick Observatory The Lick Observatory is an astronomical observatory owned and operated by the University of California. It is on the summit of Mount Hamilton, in the Diablo Range just east of San Jose, California, United States. The observatory is managed by th ...

where Keeler was working when he discovered the asteroid. It was the last asteroid discovery of the 1800s. L. K. Kristensen at

Aarhus University Aarhus University ( da, Aarhus Universitet, abbreviated AU) is a public research university with its main campus located in Aarhus, Denmark. It is the second largest and second oldest university in Denmark. The university is part of the Coimbra Gr ...

rediscovered 452 Hamiltonia along with

1537 Transylvania 1537 Transylvania, provisional designation , is a carbonaceous asteroid and long-lost minor planet from the outer regions of the asteroid belt, approximately 17 kilometers in diameter. Discovered by Gyula Strommer in 1940, it was later named aft ...

along with numerous other small objects in 1981.(1537) Transylvania and (452) Hamiltonia Kristensen, L. K.; Gibson, J.; Shao, C.-Y.; Bowell, E.; Marsden, B. G. IAU Circ., 3595, 1 (1981). Edited by Marsden, B. G

/ref> These rediscoveries left only nine numbered

minor planets According to the International Astronomical Union (IAU), a minor planet is an astronomical object in direct orbit around the Sun that is exclusively classified as neither a planet nor a comet. Before 2006, the IAU officially used the term ''minor ...

unobserved since their discoveries: 330 Adalberta (which never existed in the first place),

473 Nolli Nolli ( minor planet designation: 473 Nolli) is a rather small asteroid that may be in the Eunomia family. It was discovered by Max Wolf on February 13, 1901, but only observed for 1 month so it became a lost asteroid A minor planet is "lost" ...

719 Albert 719 Albert, provisional designation , is a stony asteroid, approximately 2.5 kilometers in diameter, classified as a near-Earth object of the Amor group of asteroids. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observato ...

724 Hapag 724 Hapag is a minor planet orbiting the Sun in the asteroid belt that was found by Austrian astronomer Johann Palisa in 1911 and named after the German shipping company Hamburg America Line. It was assigned a provisional name of 1911 NC, then be ...

843 Nicolaia 843 Nicolaia is a main-belt asteroid discovered by Danish astronomer H. Thiele on 30 September 1916. It was a lost asteroid for 65 years before being rediscovered by Astronomisches Rechen-Institut at Heidelberg in 1981. The asteroid is orbiting t ...

878 Mildred 878 Mildred is a minor planet in the main belt orbiting the Sun. It is the lowest numbered, and thus the namesake, of the Mildred family of asteroids, a subgroup of the Nysa family. The Mildred subgroup, and by extension 878 Mildred itself, is tho ...

1009 Sirene Sirene (minor planet designation: 1009 Sirene), provisional designation , is an eccentric asteroid and sizable Mars-crosser from the central regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered by German astronom ...

1026 Ingrid 1026 Ingrid, provisional designation , is a stony Florian asteroid and long-lost minor planet (1923–1986) from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by Karl Reinmuth at Heidelberg in 19 ...

, and

1179 Mally 1179 Mally, provisional designation , is an asteroid and long-lost minor planet from the central region of the asteroid belt, approximately 13 kilometers in diameter. Discovered by Max Wolf in 1931, the asteroid was lost until its rediscovery in 1 ...

. However, by the mid-1980s the only remaining

lost asteroids A minor planet is "lost" when today's observers cannot find it, because its location is too uncertain to target observations. This happens if the orbital elements of a minor planet are not known accurately enough, typically because the observat ...

of this group were 719 Albert (rediscovered in 2000), 724 Hapag (rediscovered in 1988), and 878 Mildred (rediscovered in 1991).

References

External links

* * {{DEFAULTSORT:000452 Koronis asteroids Hamiltonia 18991206 Hamiltonia