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5381 Sekhmet
Discovery
Discovered by	C. S. Shoemaker
Discovery site	Palomar Obs.
Discovery date	14 May 1991
Designations
MPC designation	(5381) Sekhmet
Pronunciation	/ˈsɛkmɛt/
Named after	Sekhmet; (Egyptian mythology)
Alternative designations	1991 JY
Minor planet category	Aten · NEO
Orbital characteristics
	Epoch 27 June 2015 (JD 2457200.5)
	Uncertainty parameter 0
Observation arc	24.00 yr (8,765 days)
Aphelion	1.2281 AU
Perihelion	0.6667 AU
Semi-major axis	0.9474 AU
Eccentricity	0.2962
Orbital period (sidereal)	0.92 yr (337 days)
Mean anomaly	165.44°
Inclination	48.968°
Longitude of ascending node	58.546°
Argument of perihelion	37.429°
Earth MOID	0.1123 AU
Physical characteristics
Mean diameter	1.42 km
Synodic rotation period	2.8233 h
Spectral type	S
Absolute magnitude (H)	16.6

5381 Sekhmet is an Aten asteroid whose orbit is sometimes closer to the Sun than the Earth's. Carolyn Shoemaker at Palomar Observatory discovered it on 14 May 1991. It is named after Sekhmet, the Egyptian goddess of war.^[3]

Sekhmet is believed to be an S-type asteroid, and some believe its diameter is approximately 1.4 km.^[4]^[5]

In December 2003, a team of astronomers at Arecibo Observatory announced that the asteroid may have a moon that measures 300 m in diameter and orbits approximately 1.5 km from Sekhmet.^[5] This moon is not yet confirmed.

References

^ ^a ^b ^c "JPL Small-Body Database Browser: 5381 Sekhmet (1991 JY)" (2015-05-13 last obs.). Jet Propulsion Laboratory. Retrieved 7 January 2016.
^ "Sekhmet". Dictionary.com Unabridged (Online). n.d.
^ ^a ^b "5381 Sekhmet (1991 JY)". Minor Planet Center. Retrieved 7 January 2016.
^ ^a ^b ^c "LCDB Data for (5381) Sekhmet". Asteroid Lightcurve Database (LCDB). Retrieved 7 January 2016.
^ ^a ^b Neish, C. D.; et al. (December 2003), "Radar Observations of Binary Asteroid 5381 Sekhmet", Bulletin of the American Astronomical Society, 35: 1421, Bibcode:2003AAS...20313402N

External links

(5381) Sekhmet, datasheet, johnstonsarchive.net
Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
5381 Sekhmet at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
5381 Sekhmet at ESA–space situational awareness
- Ephemerides · Observations · Orbit · Physical properties · Summary
5381 Sekhmet at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[jpldata-1] "JPL Small-Body Database Browser: 5381 Sekhmet (1991 JY)" (2015-05-13 last obs.). Jet Propulsion Laboratory. Retrieved 7 January 2016.

[2] "Sekhmet". Dictionary.com Unabridged (Online). n.d.

[MPC-Sekhmet-3] "5381 Sekhmet (1991 JY)". Minor Planet Center. Retrieved 7 January 2016.

[lcdb-4] "LCDB Data for (5381) Sekhmet". Asteroid Lightcurve Database (LCDB). Retrieved 7 January 2016.

[baas35_1421-5] Neish, C. D.; et al. (December 2003), "Radar Observations of Binary Asteroid 5381 Sekhmet", Bulletin of the American Astronomical Society, 35: 1421, Bibcode:2003AAS...20313402N

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