248 Lameia

248 Lameia
Orbital diagram
Discovery
Discovered byJohann Palisa
Discovery date5 June 1885
Designations
(248) Lameia
Pronunciation/ləˈmiːə/[1]
Named after
Lamia
A885 LA, 1959 LO
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc130.86 yr (47,796 d)
Aphelion2.64 AU (394.30 Gm)
Perihelion2.31 AU (345.06 Gm)
2.47 AU (369.67 Gm)
Eccentricity0.066588
3.88 yr (1,418.9 d)
18.95 km/s
264.207°
0° 15m 13.392s / day
Inclination4.0581°
246.845°
10.782°
Physical characteristics
Dimensions48.66±2.5 km[3]
11.912 h (0.4963 d)
0.0615±0.007
10.2

248 Lameia is a typical main belt asteroid. It was discovered by Austrian astronomer Johann Palisa on 5 June 1885 in Vienna and was named after the Lamia, a lover of Zeus in Ancient Greek mythology. 248 Lameia is orbiting the Sun with a period of 3.88 years and a low eccentricity (ovalness) of 0.067.[2] The semimajor axis of 2.47 AU is slightly inward from the 3:1 Kirkwood Gap.[4] Its orbital plane is inclined by 4° to the plane of the ecliptic.[2]

On 27 June 1998 an occultation of the 8th magnitude star PPM 236753 (HD 188960)[5] by 248 Lameia was timed by five observers near Gauteng, South Africa. The chords produced a rough size estimate of a 62 × 53 km ellipse.[6] The size estimate based on IRAS Minor Planet Survey data is ~49 km. The rotation rate of this object is commensurate with the rotation of the Earth, requiring observations from different locations to build a complete light curve. These yield a rotation estimate of 11.912±0.001 h with a brightness variation of 0.17±0.01 magnitude in amplitude. The same data set gives a size estimate of 47±3 km, in agreement with earlier measurements.[3]

Infrared imaging of this body shows a relatively featureless spectra that suggests materials that are similar to carbonaceous chondrite meteorites.[7]

References

  1. ^ 'Lamea' in Noah Webster (1884) A Practical Dictionary of the English Language
  2. ^ a b c "248 Lameia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
  3. ^ a b Pilcher, Frederick; et al. (April 2015). "Rotation Period and H-G Parameters Determination for 248 Lameia". Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers. 42 (2): 137–139. Bibcode:2015MPBu...42..137P.
  4. ^ Saha, Prasenjit (December 1992). "Simulating the 3:1 Kirkwood gap". Icarus. 100 (2): 434–439. Bibcode:1992Icar..100..434S. doi:10.1016/0019-1035(92)90109-K.
  5. ^ "HD 188960". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 November 2020.
  6. ^ Fraser, B.; Overbeek, M. D. (1998). "Occultation Observation of PPM 236753 by 248 Lameia, 1998 June 27". Monthly Notes of the Astronomical Society of Southern Africa. 57: 85. Bibcode:1998MNSSA..57...85F.
  7. ^ Fieber-Beyer, Sherry K.; Gaffey, Michael J. (September 2015). "Near-infrared spectroscopy of 3:1 Kirkwood Gap asteroids III". Icarus. 257: 113–125. Bibcode:2015Icar..257..113F. doi:10.1016/j.icarus.2015.04.034.

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