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813 Baumeia
Discovery  [1]
Discovered by M. F. Wolf
Discovery site Heidelberg Obs.
Discovery date28 November 1915
Designations
(813) Baumeia
Named after
H. Baum [2]
(German astronomy student)
A915 WJ · 1945 WC
1974 QR2 · 1974 QY2
A907 GH · 1915 YR
Orbital characteristics  [3]
Epoch 31 May 2020 ( JD 2459000.5)
Uncertainty parameter 0
Observation arc112.84 yr (41,213 d)
Aphelion2.2813 AU
Perihelion2.1646 AU
2.2230 AU
Eccentricity0.0263
3.31 yr (1,211 d)
226.31 °
0° 17m 50.64s / day
Inclination6.2970°
51.942°
315.69°
Physical characteristics
Mean diameter
  • 11.719±0.660  km [7]
  • 13.50±1.2 km [8]
10.543±0.002  h [9] [10]
  • 0.2027±0.040 [8]
  • 0.256±0.023 [7]

813 Baumeia ( prov. designation: A915 WJ or 1915 YR) is a stony background asteroid from the inner regions of the asteroid belt. It was discovered on 28 November 1915, by German astronomer Max Wolf at the Heidelberg Observatory in southwest Germany. [1] The common S-type asteroid has a rotation period of 10.5 hours and measures approximately 12 kilometers (7.5 miles) in diameter. It was named for H. Baum, a German student of astronomy at Heidelberg who was killed in World War I. [2]

Orbit and classification

Baumeia is a non- family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [4] [5] [6] It orbits the Sun in the inner main-belt at a distance of 2.2–2.3  AU once every 3 years and 4 months (1,211 days; semi-major axis of 2.22 AU). Its orbit has an eccentricity of 0.03 and an inclination of 6 ° with respect to the ecliptic. [3] The body's observation arc begins with its first observation as A907 GH at Heidelberg on 4 April 1907, more than 8 years prior to its official discovery observation. [1]

Naming

This minor planet was named im memory of H. Baum, a German astronomy student at Heidelberg University who was in World War I. The naming was published in the journal Astronomische Nachrichten in 1921 ( AN 214, 69). The naming was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 81). [2]

Physical characteristics

Baumeia is a common, stony S-type asteroid in both the SMASS-I taxonomy by Xu (1995), [5] as well as in the taxonomic classification based on MOVIS near-infrared colors from the catalog of the VISTA Hemisphere Survey conducted with the VISTA telescope at Paranal Observatory in Chile. [11]

Rotation period

In January 2019, a rotational lightcurve of Baumeia was obtained from photometric observations by European astronomers Bruno Christmann, Raoul Behrend, Anaël Wünsche, Marc Bretton, Rui Goncalves, Josep Bosch. Lightcurve analysis gave a well-defined rotation period of 10.543±0.002 hours with a brightness variation of 0.11±0.01 magnitude ( U=3). [9]

The result confirms and refines previous observations by French amateur astronomer René Roy in February 2003, which gave a period of 10.54±0.05 hours with an amplitude of 0.04±0.02 magnitude ( U=1), [9] by Jean-Gabriel Bosch at the French Collonges Observatory ( 178) in February 2006, which gave an identical period of 10.54±0.05 hours with an amplitude of 0.08±0.05 magnitude ( U=1), [9] by James W. Brinsfield at the Via Capote Observatory ( G69) in Australia in November 2008, which gave the first secured period of 10.544±0.002 hours with an amplitude of 0.18±0.02 magnitude ( U=3−). [12]

Diameter and albedo

According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE) and the Infrared Astronomical Satellite IRAS, Baumeia measures (11.719±0.660) and (13.50±1.2) kilometers in diameter and its surface has an albedo of (0.256±0.023) and (0.2027±0.040), respectively. [7] [8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2396 and a diameter of 13.61 kilometers based on an absolute magnitude of 11.5. [10] Alternative mean-diameter measurements published by the WISE team include (12.408±0.071  km) and (13.45±2.95 km) with corresponding albedos of (0.2434±0.0250) and (0.30±0.19). [5] [10]

References

  1. ^ a b c d e "813 Baumeia (A915 WJ)". Minor Planet Center. Retrieved 25 March 2020.
  2. ^ a b c Schmadel, Lutz D. (2007). "(813) Baumeia". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 75. doi: 10.1007/978-3-540-29925-7_814. ISBN  978-3-540-00238-3.
  3. ^ a b c d "JPL Small-Body Database Browser: 813 Baumeia (A915 WJ)" (2020-02-03 last obs.). Jet Propulsion Laboratory. Retrieved 25 March 2020.
  4. ^ a b "Asteroid 813 Baumeia – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 25 March 2020.
  5. ^ a b c d e "Asteroid 813 Baumeia". Small Bodies Data Ferret. Retrieved 25 March 2020.
  6. ^ a b Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 25 March 2020.} ( PDS main page)
  7. ^ a b c d Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System. Bibcode: 2016PDSS..247.....M. Retrieved 25 March 2020.
  8. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. Retrieved 25 March 2020.
  9. ^ a b c d Behrend, Raoul. "Asteroids and comets rotation curves – (813) Baumeia". Geneva Observatory. Retrieved 25 March 2020.
  10. ^ a b c d "LCDB Data for (813) Baumeia". Asteroid Lightcurve Database (LCDB). Retrieved 25 March 2020.
  11. ^ a b Popescu, M.; Licandro, J.; Carvano, J. M.; Stoicescu, R.; de León, J.; Morate, D.; et al. (September 2018). "Taxonomic classification of asteroids based on MOVIS near-infrared colors". Astronomy and Astrophysics. 617: A12. arXiv: 1807.00713. Bibcode: 2018A&A...617A..12P. doi: 10.1051/0004-6361/201833023. ISSN  0004-6361. ( VizieR online cat)
  12. ^ Brinsfield, James W. (April 2009). "Asteroid Lightcurve Analysis at the Via Capote Observatory: 2008 4th Quarter" (PDF). Minor Planet Bulletin. 36 (2): 64–66. Bibcode: 2009MPBu...36...64B. ISSN  1052-8091. Archived from the original (PDF) on 6 November 2020. Retrieved 25 March 2020.

External links

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