813 Baumeia

Orbital characteristics [3]Epoch 31 May 2020 (JD 2459000.5)Uncertainty parameter 0Observation arc112.84 yr (41,213 d)Aphelion2.2813 AUPerihelion2.1646 AU2.2230 AUEccentricity0.0263
Orbital period (sidereal)
3.31 yr (1,211 d)
Mean anomaly
226.31°
Mean motion
0° 17m 50.64s / dayInclination6.2970°51.942°
Argument of perihelion
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]
Absolute magnitude (H)

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

  • Lightcurve Database Query (LCDB), at www.minorplanet.info
  • Dictionary of Minor Planet Names, Google books
  • Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • 813 Baumeia at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 813 Baumeia at the JPL Small-Body Database Edit this at Wikidata
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters
Authority control databases Edit this at Wikidata
  • JPL SBDB
  • MPC