2019 LF6

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
2019 LF6
2019 LF6-orbit.png
Highly inclined orbit of 2019 LF6 passing within Mercury's orbit, and slightly outside Venus's orbit
MPC designation2019 LF6
Atira · NEO
Orbital characteristics[1]
Epoch 17 June 2019 (JD 2458651.5)
Uncertainty parameter 8
Observation arc25 days
Aphelion0.7938 AU
Perihelion0.3167 AU
0.5553 AU
151 days
2° 22m 55.2s / day
Earth MOID0.2600 AU (101.2902 LD)
Physical characteristics

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.[3][4] It orbits the Sun in 151 days.[1] 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.[5] It only occasionally brightens above 16th magnitude. Discovery was made using the Zwicky Transient Facility.[6]

Orbit and classification[edit]

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[6] inclination of 30° with respect to the ecliptic.[1]

The asteroid 2019 AQ3 is the only known asteroid with a closer aphelion, at 0.7737 AU. Its orbital evolution is similar to that of 2019 LF6.[7]


  1. ^ a b c d "JPL Small-Body Database Browser: (2019 LF6)" (2019-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 10 July 2019.
  2. ^ "2019 LF6". Minor Planet Center. Retrieved 10 July 2019.
  3. ^ "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.
  4. ^ 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.
  5. ^ Hop Aboard 2019 LF6, The Asteroid With The Shortest Year Known Astrobob, 7/10/2019
  6. ^ a b Young, Monica (2019-07-10). "Sky-surveying Telescopes Sweep Up Near-Earth Asteroids". Sky & Telescope. Retrieved 2019-07-13.
  7. ^ 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.

External links[edit]