• Source: 1151 Ithaka

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.




Discovery


Ithaka was discovered on 8 September 1929, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. Five nights later, it was independently discovered by Soviet astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula. Only the first discoverer is acknowledged by the Minor Planet Center. The body's observation arc begins with its official discovery observation at Heidelberg.




Orbit and classification


Ithaka is a non-family asteroid from the background population. It orbits the Sun in the inner main-belt at a distance of 1.7–3.1 AU once every 3 years and 9 months (1,364 days). Its orbit has an eccentricity of 0.28 and an inclination of 7° with respect to the ecliptic.




Physical characteristics


Ithaka is an assumed carbonaceous C-type asteroid, untypical for inner-belt asteroids.




= Rotation period

=
In 2011, three rotational lightcurves of Ithaka were obtained from photometric observations. Lightcurve analysis gave a well-defined rotation period between 4.93115 and 4.932 hours with a brightness amplitude of 0.12 to 0.15 magnitude (U=3/3/3).




= Diameter and albedo

=
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ithaka measures between 8.97 and 20.46 kilometers in diameter and its surface has an albedo between 0.02 and 0.13. A collaboration of Italian and American photometrists estimate a diameter of 14±3 kilometers, and the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and derives a diameter of 14.37 kilometers based on an absolute magnitude of 12.94.




Naming


This minor planet was named after the Greek Ionian Island of Ithaca located in the Ionian Sea. In Greek mythology, the legendary hero Odysseus was the King of Ithaca (also see 1143 Odysseus). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 107).




Notes






References






External links


Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
1151 Ithaka at AstDyS-2, Asteroids—Dynamic Site
Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
1151 Ithaka at the JPL Small-Body Database

Kata Kunci Pencarian:

• Daftar planet minor yang dinamai berdasarkan nama tempat
• 1151 Ithaka
• Ithaca
• List of minor planets: 1001–2000
• Meanings of minor-planet names: 1001–2000
• Karl Wilhelm Reinmuth
• List of minor planets named after places
• 1150 Achaia
• List of named minor planets: 1000–1999
• 1152 Pawona
• List of named minor planets: I