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513 Centesima

Main-belt asteroid

Field	Value
minorplanet	yes
background	#D6D6D6
name	513 Centesima
discovery_ref
discoverer	Max Wolf
discovered	24 August 1903
discovery_site	Heidelberg Observatory
mpc_name	(513) Centesima
pronounced
alt_names
mp_category	Main belt
orbit_ref
epoch	31 July 2016 (JD 2457600.5)
(JD 2456400.5)
uncertainty	0
observation_arc	112.65 yr (41144 d)
aphelion	3.2648 AU
perihelion	2.7679 AU
semimajor	3.0163 AU
eccentricity	0.082371
period	5.24 yr (1913.5 d)
inclination	9.7329°
asc_node	184.45°
arg_peri	226.24°
mean_anomaly	146.99°
mean_radius	km (IRAS)
escape_velocity	~25 m/s
sidereal_day	4.792 ±
albedo
spectral_type	S (Tholen)
K (SMASSII)
abs_magnitude	9.75
mean_motion	/ day

(JD 2456400.5) K (SMASSII)

513 Centesima is a 50 km Main-belt asteroid orbiting the Sun. It is one of the core members of the Eos family of asteroids. Relatively little is known about this tiny asteroid. It is not known to possess any natural satellites, so its mass is unknown. However, its brief rotation period of just over 5 hours implies that the body must be exceptionally dense, for its gravity is able counteract the centrifugal force. It was discovered 24 August 1903 by late-nineteenth- and early-twentieth-century astronomer Max Wolf.

History

Centesima was discovered on 24 August 1903 by astronomer Max Wolf at Heidelberg Observatory, where it was given the old-style provisional designation . The asteroid then received its permanent number (513) by 1905, and was given the name Centesima by 1907. The name commemorates the asteroid as Wolf's 100th minor planet discovery.

In 1925, the old-style minor planet provisional designation scheme was replaced by the system currently in use. the Minor Planet Center (MPC) has since retroactively applied the new-style system to pre-1925 designations. Thus, Centesima's provisional designation given upon its discovery was changed to .

Orbit

Centesima orbits the Sun at an average distance—its semi-major axis—of 3.01 astronomical units (AU), taking 5.23 years to complete one revolution. Along its orbit, its distance from the Sun varies between 2.75 AU at perihelion to 3.28 AU at aphelion due to its orbital eccentricity of 0.087. Its orbit is inclined by 9.73° with respect to the ecliptic plane. It is a member of the Eos family, a vast and ancient asteroid family located in the outer main belt.

Physical characteristics

Centesima is estimated to be 48.8 km in size. It is classified as an S-type asteroid in the Tholen classification scheme, and a K-type asteroid in the Small Main-belt Asteroid Spectroscopic Survey, Phase II (SMASSII) classification scheme. Based on observations of its lightcurve, or variations in its observed brightness, Centesima has a rotation period of 4.79 hours.

Notes

References

|access-date = 22 November 2025

|access-date=8 May 2016}}

|doi-access=free

|access-date=5 November 2025 |archive-url=https://web.archive.org/web/20250711184655/https://www.minorplanetcenter.net/mpcops/documentation/provisional-designation-definition/#oldstyle_provid |archive-date=11 July 2025

|doi-access=free

|display-authors=et al.

Info: Wikipedia Source

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eos-asteroids discoveries-by-max-wolf named-minor-planets s-type-asteroids-(tholen) k-type-asteroids-(smass) astronomical-objects-discovered-in-1903

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