Table of Data About Asteroids

for values specifications, see below

Data About Asteroids

Name	Number	Diameter (km)	Semimajor axis (in AU)	Orbital period (in years)	Orbital eccentricity	Orbital inclination (in ° to the ecliptic)	Rotation period (in hr)	Mass 1015 kg	Spectral class
Ceres	1	960x932	2.767	4.60	0.0789	10.58	9.075	870.000	C
Pallas	2	570x525x482	2.774	4.61	0.2299	34.84	7.811	318.000	U
Juno	3	240	2.669	4.36	0.2579	12.97	7.210	20.000	S
Vesta	4	530	2.362	3.63	0.0895	7.14 (Vesta further has a axis tilt of 27 degree)	5.342	300.00	U
Eugenia	45	226	2.721	4.49	0.0831	6.61	5.699	6.100	FC
Siwa	140	103	2.734	4.51	0.2157	3.19	18.5	1.500	C
Kleopatra	216	217x94	2.793	4.67	0.2535	13.14	5.385		M
Ida	243	58x23	2.861	4.84	0.0451	1.14	4.633	100	S
Mathilde	253	66x48x46	2.646	4.31	0.2660	6.71	417.7	103.3	C
Eros	433	33x13x13	1.458	1.76	0.2229	10.83	5.270	6.69	S
Gaspra	951	19x12x11	2.209	3.29	0.1738	4.10	7.042	10	S
Icarus	1566	1.4	1.078	1.12	0.8269	22.86	2.273	0.001	U
Geographos	1620	2	1.245	1.39	0.3356	13.34	5.222	0.004	S
Apollo	1862	1.6	1.471	1.81	0.5600	6.36	3.063	0.002	S
Chiron	2060	180	13.633	50.7	0.3801	6.94	5.9	4	B
Shipka	2530		3.019	5.25	0.1237	10.10
Rodari	2703		2.194	3.25	0.0572	6.04
McAuliffe	3352	2-5	1.879	2.57	0.3686	4.77
Mimistrobell	3840		2.249	3.38	0.0831	3.92
Toutatis	4179	4.6x2.4x1.9	2.512	3.98	0.6339	0.47	130	0.05	S
Castalia	4769	1.8x0.8	1.063	1.10	0.4831	8.89		0.0005
Otawara	4979	5.5	2.168	3.19	0.1449	0.91		0.2
AnneFrank	5535	4	2.212	3.29	0.0643	4.25
Braille	9969	2.2x1	2.341	3.58	0.4336	29.0
Itokawa	25143	about 1	1.324	1.52	0.2789	1.71

data NASA's National Space Science Data Center (NSSDC)

Tables Values Specifications

(in alphabetical order)

Diameter

Asteroid diameter (in km). Many of the values are rough estimates only. When asteroid is spherical or roughly spherical, value is for the equator

Mass

Asteroid's mass (in kg¹⁵). All values are rough estimates only. Mass is not weight. Mass is the amount of matter in an object. Weight is mass on which gravity is acting. E.g. an object of similar mass (154 lb.) may have a weight of 154 lb. on Earth by on 26 lb only on Moon where gravity is 1/6th the one of Earth. Mass is used to characterize an object's inertia to acceleration, i.e. its resistance to be moved or have its direction changed

Name

Name of the asteroid (as defined by the International Astronomical Union (IAU)). Usage now is to use both name and number of the asteroid (number first; 1 Vesta e.g.)

Number

Number of the asteroid (as defined by the International Astronomical Union (IAU)). Usage now is to use both name and number of the asteroid (number first; 1 Vesta e.g.)

Orbital eccentricity

Measurement of the circularity of the orbit. Is computed by the formula: (aphelion - perihelion) / (2 x semimajor axis). A circular orbit would have a value 0

Orbital inclination

Angle between the asteroid orbit's plane and Earth's orbit's plane -which is the ecliptic (in ° compared to the ecliptic -which is 0)

Orbital period

Time for the asteroid to complete an orbit around the Sun between a vernal equinox and another one. Is the equivalent of the year for the Earth (in years)

Rotation period

Mean time the Sun takes to go from noon position to the next. Is the equivalent of the day for Earth (in hours)

Semimajor axis

Mean distance from Sun. Orbits of asteroids are not circles but ellipses; hence a point of the orbit is nearest to the Sun (perihelion) and one point is farthest of it (in AU (1 Astronomical Unit=92,960,116 miles -149,597,870 km)

Spectral class

Spectral class to which the asteroid belongs