393 Lampetia

393 Lampetia
	Orbital diagram
Discovery
Discovered by	Max Wolf
Discovery date	4 November 1894
Designations
MPC designation	(393) Lampetia
Pronunciation	/læmˈpiːʃiə/
Named after	Lampetia
Alternative designations	1894 BG
Minor planet category	Main belt
Symbol
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	112.56 yr (41112 d)
Aphelion	3.6980 AU (553.21 Gm)
Perihelion	1.8568 AU (277.77 Gm)
Semi-major axis	2.7774 AU (415.49 Gm)
Eccentricity	0.33146
Orbital period (sidereal)	4.63 yr (1690.6 d); (4.63 yr)
Mean anomaly	173.245°
Mean motion	0° 12m 46.584s / day
Inclination	14.879°
Longitude of ascending node	212.460°
Time of perihelion	2023-Aug-15
Argument of perihelion	90.824°
Physical characteristics
Dimensions	96.89±31.4 km
Synodic rotation period	38.7 h (1.61 d)
Geometric albedo	0.0829±0.099
Absolute magnitude (H)	8.39

393 Lampetia is a fairly large main belt asteroid that was discovered by German astronomer Max Wolf on 4 November 1894 in Heidelberg. It has an unusually low rotation rate, with a period estimated at 38.7 hours and a brightness variation of 0.14 in magnitude.^[4]

In 2000, the asteroid was detected by radar from the Arecibo Observatory at a distance of 0.98 AU. The resulting data yielded an effective diameter of 125 ± 20 km.^[5]

It comes to opposition at apparent magnitude 10.5 on 6 July 2023^[6] and then perihelion on 15 August 2023.^[3]

References

^ James Knowles (1851) A Critical Pronouncing Dictionary of the English Language
^ Joseph Thomas (1908) Universal Pronouncing Dictionary of Biography and Mythology
^ ^a ^b ^c "393 Lampetia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 10 May 2016.
^ ^a ^b Scaltriti, F.; Zappala, V.; Schober, H. J. (January 1979), "The rotations of 128 Nemesis and 393 Lampetia - The longest known periods to date", Icarus, vol. 37, pp. 133–141, Bibcode:1979Icar...37..133S, doi:10.1016/0019-1035(79)90121-0.
^ Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999 2003" (PDF), Icarus, 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018, retrieved 14 April 2015.
^ JPL Horizons (Opposition)

External links

393 Lampetia at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
393 Lampetia at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

This article about an asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it.

[1] James Knowles (1851) A Critical Pronouncing Dictionary of the English Language

[2] Joseph Thomas (1908) Universal Pronouncing Dictionary of Biography and Mythology

[JPL-3] "393 Lampetia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 10 May 2016.

[Scaltriti1979-4] Scaltriti, F.; Zappala, V.; Schober, H. J. (January 1979), "The rotations of 128 Nemesis and 393 Lampetia - The longest known periods to date", Icarus, vol. 37, pp. 133–141, Bibcode:1979Icar...37..133S, doi:10.1016/0019-1035(79)90121-0.

[icarus186_1_126-5] Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999 2003" (PDF), Icarus, 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018, retrieved 14 April 2015.

[opposition-6] JPL Horizons (Opposition)

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