2013 LX28

2013 LX₂₈

Discovery
Discovered by	Pan-STARRS
Discovery date	12 June 2013
Designations
MPC designation	2013 LX28
Minor planet category	Apollo asteroid [1] [2] Venus crosser Earth crosser
Orbital characteristics [2] [3] [4]
Epoch 13 January 2016 (JD  2457400.5)
Uncertainty parameter 1
Aphelion	1.4543719  AU (217.57094  Gm)
Perihelion	0.5488609 AU (82.10842 Gm)
Semi-major axis	1.00161641 AU (149.839682 Gm)
Eccentricity	0.4520249
Orbital period (sidereal)	1.00  yr (366.14  d)
Mean anomaly	61.458811°
Mean motion	0° 58m 59.602s /day
Inclination	49.97420°
Longitude of ascending node	76.679354°
Argument of perihelion	345.77666°
Earth  MOID	0.373137 AU (55.8205 Gm)
Jupiter  MOID	3.8786 AU (580.23 Gm)
Physical characteristics
Dimensions	130–300 m [a] [5]
Absolute magnitude (H)	21.7 [2]

2013 LX₂₈, is an asteroid, classified as near-Earth object of the Apollo group that is a temporary quasi-satellite of the Earth, the third known Earth quasi-satellite. ^{[6] [7]}

Discovery, orbit and physical properties

2013 LX₂₈ was discovered on 12 June 2013 by the Pan-STARRS survey, and its discovery was announced in a Minor Planets Electronic Circular on 15 June. ^[8] As of September 2014, it has been observed 26 times with a data-arc span of 349 days. It is an Apollo asteroid and its semi-major axis (1.0016 AU) is very similar to that of the Earth. It has relatively high orbital eccentricity (0.4521) and high orbital inclination (49.9761°). With an absolute magnitude of 21.7, it has a diameter in the range 130–300 m (for an assumed albedo range of 0.04–0.20). ^[2]

Quasi-satellite dynamical state and orbital evolution

2013 LX₂₈ has been identified as an Earth quasi-satellite following a kidney-shaped retrograde orbit around the Earth. ^{[6] [7]}

See also

• 164207 Cardea
• (277810) 2006 FV35
• 2014 OL339

Notes

• ^{^} This is assuming an albedo of 0.20–0.04.

References

1. "List Of Apollo Minor Planets (by designation)". Minorplanetcenter.org. Retrieved 24 December 2014.
2. "2013 LX28". JPL Small-Body Database . Jet Propulsion Laboratory. SPK-ID:  3643996 . Retrieved 3 April 2016.
3. "AstDyS". NEODyS . Retrieved 24 December 2014.
4. "NEODyS". NEODyS . Retrieved 24 December 2014.
5. "Glossary: Absolute Magnitude (H)". Neo.jpl.nasa.gov. Archived from the original on 2 March 2001. Retrieved 24 December 2014.
6. Connors, M. (2014). "A Kozai-resonating Earth quasi-satellite". Monthly Notices of the Royal Astronomical Society . 437 (1): L85 –L89. Bibcode:2014MNRAS.437L..85C. doi: 10.1093/mnrasl/slt147 .
7. de la Fuente Marcos, C.; de la Fuente Marcos, R. (2014). "Asteroid 2014 OL339: yet another Earth quasi-satellite". Monthly Notices of the Royal Astronomical Society . 445 (3): 2985–2994. arXiv: 1409.5588 . Bibcode:2014MNRAS.445.2961D. doi: 10.1093/mnras/stu1978 .
8. Minor Planet Center Staff (15 June 2013). "MPEC 2013-L72: 2013 LX28". Minor Planet Electronic Circular. 2013-L72. Minor Planet Center. Bibcode:2013MPEC....L...72B . Retrieved 25 October 2025.

Further reading

• Understanding the Distribution of Near-Earth Asteroids Bottke, W. F., Jedicke, R., Morbidelli, A., Petit, J.-M., Gladman, B. 2000, Science, Vol. 288, Issue 5474, pp. 2190–2194.
• A Numerical Survey of Transient Co-orbitals of the Terrestrial Planets Christou, A. A. 2000, Icarus, Vol. 144, Issue 1, pp. 1–20.
• Debiased Orbital and Absolute Magnitude Distribution of the Near-Earth Objects Bottke, W. F., Morbidelli, A., Jedicke, R., Petit, J.-M., Levison, H. F., Michel, P., Metcalfe, T. S. 2002, Icarus, Vol. 156, Issue 2, pp. 399–433.
• Transient co-orbital asteroids Brasser, R., Innanen, K. A., Connors, M., Veillet, C., Wiegert, P., Mikkola, S., Chodas, P. W. 2004, Icarus, Vol. 171, Issue 1, pp. 102–109.
• A Kozai-resonating Earth quasi-satellite Connors, M. 2014, Monthly Notices of the Royal Astronomical Society, Vol. 437, Issue 1, pp. L85–L89.
• Asteroid 2014 OL339: yet another Earth quasi-satellite de la Fuente Marcos, C., de la Fuente Marcos, R. 2014, Monthly Notices of the Royal Astronomical Society, Vol. 445, Issue 3, pp. 2985–2994.

External links

• Discovery MPEC
• 2013 LX₂₈ data at MPC
• 2013 LX28 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemerides  · Observation prediction  · Orbital info  · MOID  · Proper elements  · Observational info  · Close approaches  · Physical info  · Orbit animation
• 2013 LX28 at ESA–space situational awareness
  • Ephemerides  · Observations  · Orbit  · Physical properties  · Summary
• 2013 LX28 at the JPL Small-Body Database
  • Close approach  · Discovery  · Ephemeris  · Orbit viewer  · Orbit parameters  · Physical parameters