The Nysa or Nysian asteroids (also known as the Hertha

135 Hertha

135 Hertha is a large main-belt asteroid. Named Hertha, another name for Nerthus, a Germanic fertility goddess. It orbits among the Nysa asteroid family but its classification as an M-type asteroid does not match the more common F-type asteroid for this family, suggesting that it may be an interloper...

 family or the Polana

142 Polana

142 Polana is a very dark main belt asteroid. It was discovered by Johann Palisa on January 28, 1875, and named after the city of Pola , home of the Austrian Naval Observatory where he made the discovery....

 family) are a group of asteroids in the Main Belt orbiting the sun

Sun

The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...

 between 2.41 and 2.5 AU

Astronomical unit

An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....

. Asteroids in this family have eccentricities

Orbital eccentricity

The orbital eccentricity of an astronomical body is the amount by which its orbit deviates from a perfect circle, where 0 is perfectly circular, and 1.0 is a parabola, and no longer a closed orbit...

 between 0.12 and 0.21 and 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...

s of 1.4 to 4.3. The family derives its name from its most massive member, 44 Nysa

44 Nysa

44 Nysa is a large and very bright main-belt asteroid, and the brightest member of the Nysian asteroid family. It is classified as a rare class E asteroid and is probably the largest of this type .-Discovery:...

.

Subgroups

Asteroids in the Nysa family are typically divided into two, mineralogically different subgroups: Nysa and Polana. Aside from 44 Nysa and 135 Hertha, asteroids in the Nysian subgroup are 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:...

s. Asteroids in the Polanian subgroup, like 142 Polana, are F-type asteroid

F-type asteroid

F-type asteroids are a relatively uncommon type of carbonaceous asteroid, falling into the wider C-group.-Characteristics:Generally similar to the B-type asteroids, but...

s.

Nysian asteroids

Name	a	e	i 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...
44 Nysa 44 Nysa 44 Nysa is a large and very bright main-belt asteroid, and the brightest member of the Nysian asteroid family. It is classified as a rare class E asteroid and is probably the largest of this type .-Discovery:...	2.423	0.149	3.703°
135 Hertha 135 Hertha 135 Hertha is a large main-belt asteroid. Named Hertha, another name for Nerthus, a Germanic fertility goddess. It orbits among the Nysa asteroid family but its classification as an M-type asteroid does not match the more common F-type asteroid for this family, suggesting that it may be an interloper...	2.428	0.206	2.306°
142 Polana 142 Polana 142 Polana is a very dark main belt asteroid. It was discovered by Johann Palisa on January 28, 1875, and named after the city of Pola , home of the Austrian Naval Observatory where he made the discovery....	2.418	0.136	2.238°
750 Oskar 750 Oskar - References :*...	2.444	0.130	3.952°
2984 Chaucer 2984 Chaucer 2984 Chaucer is a small main belt asteroid, which was discovered by Edward L. G. Bowell in 1981. It is named after Geoffrey Chaucer, the medieval English poet....	2.470	0.135	3.054°
2391 Tomita 2391 Tomita 2391 Tomita is a main-belt asteroid discovered on January 9, 1957 by K. Reinmuth at Heidelberg.- External links :*...
2509 Chukotka 2509 Chukotka 2509 Chukotka is a main-belt asteroid discovered on July 14, 1977 by Chernykh, N. at Nauchnyj.- External links :*...
2710 Veverka 2710 Veverka 2710 Veverka is a main belt asteroid with an orbital period of 1379.4413125 days . The asteroid was discovered on March 23, 1982. It was named after astronomer Joseph Veverka.-References:...
3048 Guangzhou 3048 Guangzhou 3048 Guangzhou is a main-belt asteroid discovered on October 8, 1964 by Purple Mountain Observatory at Nanking.- External links :*...
3069 Heyrovsky 3069 Heyrovský 3069 Heyrovský is a main belt asteroid with an orbital period of 1317.6460254 days .The asteroid was discovered on October 16, 1982. It's named by Jaroslav Heyrovský.-References:...
3172 Hirst 3172 Hirst 3172 Hirst is a main-belt asteroid discovered on November 24, 1981 by Bowell, E. at Flagstaff .- External links :*...
3467 Bernheim 3467 Bernheim 3467 Bernheim is an asteroid. It was discovered on September 26, 1981 by Norman G. Thomas of Lowell Observatory and was named to honour Robert Burnham, Jr., Thomas' former co-worker at Lowell and the author of Burnham's Celestial Handbook...	2.409	0.149	4.112°
3952 Russellmark 3952 Russellmark 3952 Russellmark is a main-belt asteroid discovered on March 14, 1986 by Bulgarian National Observatory at Rozhen.- External links :*...
4797 Ako 4797 Ako 4797 Ako is a main belt asteroid discovered on September 30, 1989 by T. Nomura and K. Kawanishi at Minami-Oda.- External links :*...
5075 Goryachev 5075 Goryachev 5075 Goryachev is a main-belt asteroid discovered on October 13, 1969 by B. A. Burnasheva at the Crimean Astrophysical Observatory.- External links :*...
5394 Jurgens 5394 Jurgens 5394 Jurgens is a main-belt asteroid discovered on March 6, 1986 by E. Bowell at Flagstaff.- External links :*...
7629 Foros 7629 Foros 7629 Foros is a main-belt asteroid discovered on August 19, 1977 by Chernykh, N. S. at Nauchnyj.- External links :*...
9922 Catcheller 9922 Catcheller 9922 Catcheller is a main belt asteroid. It orbits the Sun once every 3.72 years. It is associated with the Nysa family of asteroids.Discovered on March 2, 1981 by Schelte Bus at the Siding Spring Observatory, it was given the provisional designation ""...	2.402	0.190	2.492°