1748 Mauderli

1748 Mauderli

Discovery[1]
Discovered by	P. Wild
Discovery site	Zimmerwald Obs.
Discovery date	7 September 1966
Designations
MPC designation	(1748) Mauderli
Named after	Sigmund Mauderli (Swiss astronomer)[2]
Alternative designations	1966 RA · 1927 SF 1934 ND1 · 1938 DL2 1943 TP · 1951 UH 1951 XD · A922 BC
Minor planet category	main-belt · Hilda[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	95.36 yr (34,830 days)
Aphelion	4.8163 AU
Perihelion	3.0642 AU
Semi-major axis	3.9403 AU
Eccentricity	0.2223
Orbital period (sidereal)	7.82 yr (2,857 days)
Mean anomaly	223.85°
Mean motion	0° 7^m 33.6^s / day
Inclination	3.2937°
Longitude of ascending node	125.95°
Argument of perihelion	199.95°
Jupiter MOID	0.5342 AU
Physical characteristics
Dimensions	40.32 km (derived)[4] 44.908±0.345 km[5] 51.91±1.28 km[6]
Synodic rotation period	6.00 h[7] 6.001±0.001 h[a]
Geometric albedo	0.037±0.002[6] 0.048±0.013[5] 0.05±0.01[5] 0.057 (assumed)[4]
Spectral type	Tholen = D[1] · D[4][5][8] B–V = 0.710[1] U–B = 0.264[1]
Absolute magnitude (H)	10.58±0.26[8] · 10.65[1][6] · 10.70[4][7]

1748 Mauderli, provisional designation 1966 RA, is a dark and very reddish Hildian asteroid from the outermost region of the asteroid belt, approximately 45 kilometers in diameter.

It was discovered on 7 September 1966, by astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, and was later named after Swiss astronomer Sigmund Mauderli.[2][3]

Orbit and classification

Mauderli is a member of the Hilda family of asteroids which stay in a 3:2 resonance with the gas giant Jupiter. Among the Hilda family, it is one of its members with the highest amplitude of libration relative to the stable periodic orbit.[9]

The asteroid orbits the Sun in the outermost main-belt at a distance of 3.1–4.8 AU once every 7 years and 10 months (2,857 days). Its orbit has an eccentricity of 0.22 and an inclination of 3° with respect to the ecliptic.[1] Mauderli was first identified as A922 BC at Heidelberg Observatory in 1922, extending the body's observation arc by 44 years prior to its official discovery observation.[3]

Physical characteristics

Mauderli a dark D-type asteroid in the Tholen classification.[1] It is also the reddest among the known asteroids of this spectral type.[10]

Three rotational lightcurves gave a concurring rotation period of 6.00 hours with a brightness variation between 0.10 and 0.12 magnitude (U=n.a/3/2-).[7][11][a]

Diameter and albedo

Based on the space-based surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE missions, Mauderli measures 44.908 and 51.91 kilometers in diameter and has an albedo of 0.037 and 0.048, respectively.[5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 40.32 kilometers with on an absolute magnitude of 10.7.[4]

Naming

This minor planet was named by the discoverer in honor of Sigmund Mauderli (1876–1962), Swiss astronomer and director of the Astronomical Institute at the University of Bern from 1921–1946. He devoted much of his time to orbit determination and perturbation computing of minor planets for the Astronomisches Rechen-Institut in Germany.[2] The official naming citation was published by the Minor Planet Center on 1 October 1969 (M.P.C. 2971).[12]

Notes

1. Slyusarev (2012) web: rotation period 6.001±0.001 hours with a brightness amplitude of 0.1 magnitude. Summary figures for (1748) Mauderli at Collaborative Asteroid Lightcurve Link (CALL).

References

1. "JPL Small-Body Database Browser: 1748 Mauderli (1966 RA)" (2017-06-05 last obs.). Jet Propulsion Laboratory. Retrieved 1 July 2017.
2. Schmadel, Lutz D. (2007). "(1748) Mauderli". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 139. doi:10.1007/978-3-540-29925-7_1749. ISBN 978-3-540-00238-3.
3. "1748 Mauderli (1966 RA)". Minor Planet Center. Retrieved 20 December 2016.
4. "LCDB Data for (1748) Mauderli". Asteroid Lightcurve Database (LCDB). Retrieved 20 December 2016.
5. Grav, T.; Mainzer, A. K.; Bauer, J.; Masiero, J.; Spahr, T.; McMillan, R. S.; et al. (January 2012). "WISE/NEOWISE Observations of the Hilda Population: Preliminary Results". The Astrophysical Journal. 744 (2): 15. arXiv:1110.0283. Bibcode:2012ApJ...744..197G. doi:10.1088/0004-637X/744/2/197. S2CID 44000310. Retrieved 11 December 2016.
6. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
7. Dahlgren, M.; Lahulla, J. F.; Lagerkvist, C.-I.; Lagerros, J.; Mottola, S.; Erikson, A.; et al. (June 1998). "A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids". Icarus. 133 (2): 247–285. Bibcode:1998Icar..133..247D. doi:10.1006/icar.1998.5919. Retrieved 20 December 2016.
8. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved 20 December 2016.
9. Ferraz-Mello, S. (November 1990). "Regular Motions of Resonant Asteroids". Revista Mexicana de Astronomía y Astrofísica. 21: 572. Bibcode:1990RMxAA..21..569F. Retrieved 18 November 2015.
10. Weintraub, David A.; Tegler, Stephen C.; Romanishin, W. (August 1997). "Visible and Near-Infrared Photometry of the Centaur Objects 1995 GO and 5145 Pholus". Icarus. 128 (2): 456–463. Bibcode:1997Icar..128..456W. doi:10.1006/icar.1997.5739. Retrieved 18 November 2015.
11. Gonano, M.; Mottola, S.; Neukum, G.; di Martino, M. (December 1990). "Physical study of outer belt asteroids". Space Dust and Debris; Proceedings of the Topical Meeting of the Interdisciplinary Scientific Commission B /Meetings B2. 11 (12): 197–200. Bibcode:1991AdSpR..11l.197G. doi:10.1016/0273-1177(91)90563-Y. ISSN 0273-1177. Retrieved 20 December 2016.
12. Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. Bibcode:2009dmpn.book.....S. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 1748 Mauderli at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 1748 Mauderli at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters