Astronomy:348 May
 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 28 November 1892 |
| Designations | |
| (348) May | |
| Pronunciation | German: [ˈmaɪ] |
| Named after | Probably Karl May[1] |
| 1892 R | |
| Minor planet category | Main belt |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 123.36 yr (45,056 d) |
| |{{{apsis}}}|helion}} | 3.16969 astronomical unit|AU (474.179 Gm) |
| |{{{apsis}}}|helion}} | 2.76919 AU (414.265 Gm) |
| 2.96944 AU (444.222 Gm) | |
| Eccentricity | 0.067437 |
| Orbital period | 5.12 yr (1,869.0 d) |
| Mean anomaly | 21.8117° |
| Mean motion | 0° 11m 33.418s / day |
| Inclination | 9.74506° |
| Longitude of ascending node | 90.0424° |
| 13.4397° | |
| Physical characteristics | |
| Dimensions | 82.82±2.2 km |
| Mass | 9.47×1020 kg[3] |
| Mean density | 2.09±0.05 g cm−3[3] |
| Rotation period | 7.3812 h (0.30755 d) |
| Geometric albedo | 0.0448±0.002 |
| Absolute magnitude (H) | 9.40 |
May (minor planet designation: 348 May) is a large Main belt asteroid.[2] It was discovered by Auguste Charlois on 28 November 1892 in Nice, and was named for the German author Karl May.[4] This asteroid is orbiting the Sun at a distance of 2.97 astronomical unit|AU with a period of 5.12 years and an eccentricity (ovalness) of 0.067. The orbital plane is inclined at an angle of 9.7° to the plane of the ecliptic.[2] During its orbit, this asteroid has made close approaches to the dwarf planet Ceres. For example, in September 1984 the two were separated by 6.3 Gm (0.042 AU).[5]
Analysis of the asteroid light curve generated from photometric data collected during 2007 provided a rotation period of 7.385±0.004 h with a brightness variation of 0.16±0.03 in magnitude. This is consistent with an estimate from a 2006 study.[6] It is classified as a G-type asteroid[5] and spans a diameter of approximately 83 km.[2]
References
- ↑ Schmadel, L. (2003:44). Dictionary of minor planet names. Germany: Springer.
- ↑ 2.0 2.1 2.2 2.3 "348 May (1892 R)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=348.
- ↑ 3.0 3.1 Baer, James J.; Chesley, S. R. (July 2007), "Astrometric Masses of 21 Asteroids, and an Integrated Asteroid Ephemeris", American Astronomical Society, DDA meeting #38, 9.03, Bibcode: 2007DDA....38.0903B.
- ↑ Schmadel, Lutz (2003), Dictionary of minor planet names, 1, Springer, p. 44, ISBN 9783540002383, https://books.google.com/books?id=VoJ5nUyIzCsC&pg=PA44
- ↑ 5.0 5.1 Sitarski, G.; Todorovic-Juchniewicz, B. (April 1992), "Determination of the Mass of (1) Ceres from Perturbations on (203) Pompeja and (348) May", Acta Astronomica 42: 139–144, Bibcode: 1992AcA....42..139S.
- ↑ Sauppe, Jason et al. (December 2007), "Asteroid Lightcurve Analysis at the Oakley Observatory - March/April 2007", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 34 (4): 119–122, Bibcode: 2007MPBu...34..119S.
External links
- 348 May at AstDyS-2, Asteroids—Dynamic Site
- 348 May at the JPL Small-Body Database
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