Highly inclined orbit of 2019 LF6 passing within Mercury's orbit, and slightly outside Venus's orbit
|MPC designation||2019 LF6|
|Atira · NEO|
|Orbital characteristics |
|Epoch 17 June 2019 (JD 2458651.5)|
|Uncertainty parameter 8|
|Observation arc||25 days|
|2° 22m 55.2s / day|
|Earth MOID||0.2600 AU (101.2902 LD)|
2019 LF6 is a near-Earth object of the Atira group. It has the smallest semi-major axis among the known minor planets (0.555 AU), beating the previously-held record of 2019 AQ3. It orbits the Sun in 151 days. Only the planet Mercury has a smaller semi-major axis and a shorter orbital period.
Discovered at only 19th magnitude, it is very difficult to see, never getting far from the sun and twilight. It only occasionally brightens above 16th magnitude. Discovery was made using the Zwicky Transient Facility.
Orbit and classification
It orbits the Sun at a distance of 0.3–0.8 AU once every 5 months (151 days; semi-major axis of 0.56 AU). Its orbit has an eccentricity of 0.43 and an unusually large inclination of 30° with respect to the ecliptic.
- "JPL Small-Body Database Browser: (2019 LF6)" (2019-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 10 July 2019.
- "2019 LF6". Minor Planet Center. Retrieved 10 July 2019.
- "JPL Small-Body Database Search Engine: a > 0 (au) and a < 0.7 (au) and data-arc span > 3 (d)". JPL Solar System Dynamics. Retrieved 10 July 2019.
- de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (1 August 2019). "Understanding the evolution of Atira-class asteroid 2019 AQ3, a major step towards the future discovery of the Vatira population". Monthly Notices of the Royal Astronomical Society. 487 (2): 2742–2752. arXiv:1905.08695. Bibcode:2019MNRAS.487.2742D. doi:10.1093/mnras/stz1437.
- Hop Aboard 2019 LF6, The Asteroid With The Shortest Year Known Astrobob, 7/10/2019
- Young, Monica (2019-07-10). "Sky-surveying Telescopes Sweep Up Near-Earth Asteroids". Sky & Telescope. Retrieved 2019-07-13.
- de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (25 July 2019). "Hot and Eccentric: The Discovery of 2019 LF6 as a New Step in the Quest for the Vatira Population". Research Notes of the American Astronomical Society. 3 (7): 106. Bibcode:2019RNAAS...3g.106D. doi:10.3847/2515-5172/ab346c.
- 2019 LF6 at the JPL Small-Body Database
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