2019 UN13

2019 UN₁₃
Discovery
Discovered by	CSS (Teddy Pruyne)
Discovery site	Catalina Stn.
Discovery date	31 October 2019; (first observed only)
Designations
MPC designation	2019 UN13
Alternative designations	C0PPEV1
Minor planet category	NEO · Aten
Orbital characteristics
	Epoch 27 April 2019 (JD 2458600.5)
	Uncertainty parameter 7
Observation arc	3.7 hours; (18 observations)
Aphelion	1.3301 AU; (2.06 AU after passage)
Perihelion	0.6463 AU
Semi-major axis	0.9882 AU
Eccentricity	0.3460
Orbital period (sidereal)	359 days
Mean anomaly	100.74°
Mean motion	1° 0m 12.24s / day
Inclination	1.4925°
Longitude of ascending node	217.58°
Argument of perihelion	291.05°
Earth MOID	0.000005 AU (700 km)
Physical characteristics
Mean diameter	1–2 m
Mass	2800 kg (est.)
Absolute magnitude (H)	32.0

2019 UN₁₃ is a small near-Earth asteroid roughly 1–2 meters in diameter. Even though the asteroid was in the night sky for months, it was fainter than the sky survey limit of apparent magnitude 24 until 29 October 2019 when the asteroid was two million km from Earth.^[7] It was discovered on October 31, 2019, passing 6,200 km above Earth's surface.^[8]^[9]

2020 QG and 2011 CQ1 are the only asteroids known where the nominal orbit passed closer to the surface of Earth.^[6] Other asteroids that passed very close to Earth include 2004 FU162, 2018 UA, and 2019 AS5.

An impact by 2019 UN₁₃ would be less significant than the 2018 LA impact.

^ ^a ^b ^c ^d Cite error: The named reference MPC-object was invoked but never defined (see the help page).
^ "Pseudo-MPEC for C0PPEV1". Archived from the original on 1 November 2019. Retrieved 1 November 2019.
^ ^a ^b ^c Cite error: The named reference jpldata was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference sentry was invoked but never defined (see the help page).
^ Cite error: The named reference esa was invoked but never defined (see the help page).
^ ^a ^b Go to https://cneos.jpl.nasa.gov/ca/ and for Table Settings select "Nominal distance <= 1 LD", "Past only" and sort by "CA distance nominal"
^ Cite error: The named reference NEODyS2019 was invoked but never defined (see the help page).
^ "Spooky Halloween asteroid flyby one of the closest near misses ever seen"..
^ Newly-discovered #asteroid C0PPEV1 Twitter message

[MPC-object-1] Cite error: The named reference MPC-object was invoked but never defined (see the help page).

[2] "Pseudo-MPEC for C0PPEV1". Archived from the original on 1 November 2019. Retrieved 1 November 2019.

[jpldata-3] Cite error: The named reference jpldata was invoked but never defined (see the help page).

[sentry-4] Cite error: The named reference sentry was invoked but never defined (see the help page).

[esa-5] Cite error: The named reference esa was invoked but never defined (see the help page).

[NEO-CA-6] Go to https://cneos.jpl.nasa.gov/ca/ and for Table Settings select "Nominal distance <= 1 LD", "Past only" and sort by "CA distance nominal"

[NEODyS2019-7] Cite error: The named reference NEODyS2019 was invoked but never defined (see the help page).

[8] "Spooky Halloween asteroid flyby one of the closest near misses ever seen"..

[9] Newly-discovered #asteroid C0PPEV1 Twitter message

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