Astronomy:513 Centesima

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513 Centesima
Discovery[1]
Discovered byMax Wolf
Discovery siteHeidelberg Observatory
Discovery date24 August 1903
Designations
(513) Centesima
Pronunciation/sɛnˈtɛzɪmə/
A903 QD · A914 WB · A916 BC · 1950 RM1[2][lower-alpha 1]
Minor planet categoryMain belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
(JD 2456400.5)
Uncertainty parameter 0
Observation arc112.65 yr (41144 d)
|{{{apsis}}}|helion}}3.2648 astronomical unit|AU (488.41 Gm)
|{{{apsis}}}|helion}}2.7679 AU (414.07 Gm)
3.0163 AU (451.23 Gm)
Eccentricity0.082371
Orbital period5.24 yr (1913.5 d)
Mean anomaly146.99°
Mean motion0° 11m 17.304s / day
Inclination9.7329°
Longitude of ascending node184.45°
226.24°
Physical characteristics
Mean radius25.075±0.9 km (IRAS)
Equatorial escape velocity
~25 m/s (56 mph)
Sidereal rotation period4.792 ± 0.019 h (0.19967 ± 0.00079 d)[4]: 248 
Geometric albedo0.0885±0.007[2]
S (Tholen)
K (SMASSII)[2]
Absolute magnitude (H)9.75[2]


513 Centesima is a 50 km Main-belt asteroid orbiting the Sun.[2] 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.[2]

History

Centesima was discovered on 24 August 1903 by astronomer Max Wolf at Heidelberg Observatory,[1] where it was given the old-style provisional designation 1903 LY.[5]: 383  The asteroid then received its permanent number (513) by 1905,[5]: 383  and was given the name Centesima by 1907.[6]: 271  The name commemorates the asteroid as Wolf's 100th minor planet discovery.[7]: 54 

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.[8] Thus, Centesima's provisional designation given upon its discovery was changed to A903 QD.[2]

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.[2] It is a member of the Eos family,[9]: 473  a vast and ancient asteroid family[10]: 2612  located in the outer main belt.[11]: 277 

Physical characteristics

Centesima is estimated to be 48.8 kilometres (30.3 mi) 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.[2] Based on observations of its lightcurve, or variations in its observed brightness, Centesima has a rotation period of 4.79 hours.[4]: 248 

Notes

  1. ↑ The MPC notates Cantesima's retroactive new-style designations as 1903 QD, 1914 WB, and 1916 BC.[1] Its old-style designations were 1903 LY,[3]: 343  1914 WB, and 1916 Sav.

References

  1. ↑ 1.0 1.1 1.2 "(513) Centesima = 1903 QD = 1914 WB = 1916 BC = 1950 RM1". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=513.  (5824 obs)
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 "JPL Small-Body Database Browser: 513 Centesima (1903 LY)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=513. 
  3. ↑ "Notes on some Points connected with the Progress of Astronomy during the Past Year". Monthly Notices of the Royal Astronomical Society 64 (4): 343–377. 12 February 1904. doi:10.1093/mnras/64.4.343. 
  4. ↑ 4.0 4.1 Farfán, Rafael González (July 2025). "Review of Rotation Curves and Periods of 32 Asteroids". The Minor Planet Bulletin 52 (3): 246–253. Bibcode: 2025MPBu...52..246F. 
  5. ↑ 5.0 5.1 "Notes on some Points connected with the Progress of Astronomy during the Past Year". Monthly Notices of the Royal Astronomical Society 65 (4): 382–406. 10 February 1905. doi:10.1093/mnras/65.4.382. 
  6. ↑ "Notes on some Points connected with the Progress of Astronomy during the Past Year". Monthly Notices of the Royal Astronomical Society 67 (4): 269–293. 8 February 1907. doi:10.1093/mnras/67.4.269. 
  7. ↑ Dictionary of Minor Planet Names. 2 (6 ed.). Springer Berlin, Heidelberg. 11 November 2013. pp. 1452. doi:10.1007/978-3-642-29718-2. ISBN 978-3-642-29717-5. https://books.google.com/books?id=eHv1CAAAQBAJ&pg=PA70. 
  8. ↑ "Provisional Designations". Minor Planets Center. https://www.minorplanetcenter.net/mpcops/documentation/provisional-designation-definition/#oldstyle_provid. 
  9. ↑ Burbine, Thomas H.; Binzel, Richard P. (October 2002). "Small Main-Belt Asteroid Spectroscopic Survey in the Near-Infrared". Icarus 159 (2): 468–499. doi:10.1006/icar.2002.6902. Bibcode: 2002Icar..159..468B. 
  10. ↑ Tsirvoulis, Georgios (January 2019). "Discovery of a young subfamily of the (221) Eos asteroid family". Monthly Notices of the Royal Astronomical Society 482 (2): 2612–2618. doi:10.1093/mnras/sty2898. Bibcode: 2019MNRAS.482.2612T. 
  11. ↑ Mothé-Diniz, T.; Carvano, J. M.; Bus, S. J.; Duffard, R.; Burbine, T. H. (May 2008). "Mineralogical analysis of the Eos family from near-infrared spectra". Icarus 195 (1): 277–294. doi:10.1016/j.icarus.2007.12.005. Bibcode: 2008Icar..195..277M. 



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