198 Ampella

Orbital characteristics [ftp://ftp.lowell.edu/pub/elgb/astorb.html 1]
Orbit Orbit In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the Solar System...  type	Main belt Asteroid belt The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets...
Semimajor axis	2.458 AU Astronomical unit An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....
Perihelion distance	1.894 AU Astronomical unit An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....
Aphelion distance	3.022 AU Astronomical unit An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....
Orbital period Orbital period The orbital period is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars.There are several kinds of...	3.85 years
Inclination Inclination Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit...	9.30°
Eccentricity	0.229
Physical characteristics [ftp://ftp.lowell.edu/pub/elgb/astorb.html 1]
Diameter Diameter In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints are on the circle. The diameters are the longest chords of the circle...	57.2 km
Rotation period Rotation period The rotation period of an astronomical object is the time it takes to complete one revolution around its axis of rotation relative to the background stars...  3	10.383 hours
Spectral class	S S-type asteroid S-type asteroids are of a stony composition, hence the name. Approximately 17% of asteroids are of this type, making it the second most common after the C-type.-Characteristics:...
Abs. magnitude Absolute magnitude Absolute magnitude is the measure of a celestial object's intrinsic brightness. it is also the apparent magnitude a star would have if it were 32.6 light years away from Earth...	8.33
Albedo Albedo Albedo , or reflection coefficient, is the diffuse reflectivity or reflecting power of a surface. It is defined as the ratio of reflected radiation from the surface to incident radiation upon it...  4	0.252
History 2
Discoverer	A. Borrelly, 1879

198 Ampella is a fairly large Main belt

Asteroid belt

The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets...

 asteroid

Asteroid

Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...

. It is an S-type asteroid

S-type asteroid

S-type asteroids are of a stony composition, hence the name. Approximately 17% of asteroids are of this type, making it the second most common after the C-type.-Characteristics:...

.

It was discovered by Alphonse Borrelly on June 13, 1879. The name seems to be the feminine form of Ampelos

Ampelos

Ampelos is the Ancient Greek for "vine".In an etiology told by Nonnus, the vine is personified as a beautiful satyr youth, who was close to Dionysus. As foreseen by Dionysus, the youth was killed in an accident with a bull...

, a satyr

Satyr

In Greek mythology, satyrs are a troop of male companions of Pan and Dionysus — "satyresses" were a late invention of poets — that roamed the woods and mountains. In myths they are often associated with pipe-playing....

 and good friend of Dionysus

Dionysus

Dionysus was the god of the grape harvest, winemaking and wine, of ritual madness and ecstasy in Greek mythology. His name in Linear B tablets shows he was worshipped from c. 1500—1100 BC by Mycenean Greeks: other traces of Dionysian-type cult have been found in ancient Minoan Crete...

 in Greek mythology

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

. It could also derive from the Ampelose (plural of Ampelos), a variety of hamadryad

Hamadryad

Hamadryads are Greek mythological beings that live in trees. They are a particular type of dryad, which in turn are a particular type of nymph. Hamadryads are born bonded to a particular tree. Some believe that hamadryads are the actual tree, while normal dryads are simply the entities, or...

.

So far Ampella has been observed occulting

Occultation

An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer. The word is used in astronomy . It can also refer to any situation wherein an object in the foreground blocks from view an object in the background...

 a star

Star

A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...

 once, on November 8, 1991 from New South Wales

New South Wales

New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

, Australia.