919 Ilsebill facts for kids

919 Ilsebill is a dark space rock found in the middle part of the asteroid belt. It was discovered on October 30, 1918. The astronomer Max Wolf found it at the Heidelberg-Königstuhl State Observatory in Germany.

This asteroid is a C-type asteroid, meaning it's made of carbon. It spins quite fast, completing a full turn in about 5 hours. Its size is around 33 kilometers (about 20 miles) across. The name "Ilsebill" comes from a character in the fairy tale The Fisherman and His Wife by the Brothers Grimm.

Ilsebill's Journey Around the Sun

Ilsebill is a regular asteroid in the main asteroid belt. It is not part of a specific asteroid family. It travels around the Sun in the central part of the asteroid belt. This area is sometimes called the Kirkwood gap.

The asteroid is located between 2.5 and 3.0 AU from the Sun. One AU is the distance from the Earth to the Sun. Ilsebill takes about 4 years and 7 months to complete one orbit. This is about 1,686 days. Its path is slightly oval-shaped, which is called its orbital eccentricity. The path is also tilted by about 8 degrees compared to Earth's orbit.

Astronomers first officially saw Ilsebill on October 30, 1918. This was at the Heidelberg Observatory.

How Ilsebill Got Its Name

This minor planet was named after a character named "Ilsebill." She is from the fairy tale The Fisherman and His Wife by the Brothers Grimm. The original German title is Von dem Fischer und seiner Frau.

The asteroid was likely named after its discoverer, Max Wolf, passed away in 1932. His wife, Gisela Wolf, suggested the name. The name was then officially announced by the ARI. The naming was also mentioned in a book called The Names of the Minor Planets in 1955.

What Ilsebill Is Like

Ilsebill is known as a C-type asteroid. This means it is a carbon-rich asteroid. It has a dark surface. Scientists classify it this way based on its light patterns.

How Ilsebill Spins

In October 2010, scientists studied how Ilsebill spins. They used special observations called lightcurves. These were taken by astronomers at the Oakley Observatory in Indiana, USA.

Their studies showed that Ilsebill spins completely around in about 5.0325 hours. This is a very precise measurement. Another study in September 2010 found a similar spin time of 5.034 hours.

In 2018, more data was used to create a model of its spin. This model confirmed the spin period. It also helped scientists figure out the direction of its spin axis in space.

Ilsebill's Size and Surface

Scientists have used different space telescopes to measure Ilsebill. These include the IRAS satellite, the Japanese Akari satellite, and NASA's NEOWISE mission (part of the WISE telescope).

These measurements show that Ilsebill is about 27.65 to 33.5 kilometers (17 to 21 miles) across. Its surface is quite dark. This is measured by its albedo, which is how much light it reflects. Ilsebill's albedo is very low, between 0.047 and 0.0698. This means it reflects only a small amount of sunlight.

The Collaborative Asteroid Lightcurve Link also estimates its size. Based on its brightness, they suggest it is about 27.62 kilometers across.

See also

In Spanish: (919) Ilsebill para niños

919 Ilsebill at AstDyS-2, Asteroids—Dynamic Site

• • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info

919 Ilsebill at the JPL Small-Body DatabaseLua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).

• • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters