152830 Dinkinesh

152830 Dinkinesh
	Dinkinesh and its satellite Selam imaged by the Lucy spacecraft's L'LORRI camera
Discovery
Discovered by	LINEAR
Discovery site	Lincoln Lab ETS
Discovery date	4 November 1999
Designations
MPC designation	(152830) Dinkinesh
Pronunciation	/ˈdɪŋkɪnɛʃ/
Named after	Dinkʼinesh (Lucy fossil)
Alternative designations	1999 VD57 · 2004 HJ78 · 2007 CB63
Minor planet category	main-belt · (inner)
Orbital characteristics
	Epoch 25 February 2023 (JD 2460000.5)
	Uncertainty parameter 0
Observation arc	23.06 yr (8,422 days)
Earliest precovery date	15 October 1999
Aphelion	2.437 AU
Perihelion	1.946 AU
Semi-major axis	2.191 AU
Eccentricity	0.1120
Orbital period (sidereal)	3.24 yr (1,185 days)
Mean anomaly	25.239°
Mean motion	0° 18m 13.874s / day
Inclination	2.094°
Longitude of ascending node	21.380°
Argument of perihelion	66.711°
Known satellites	1
Physical characteristics
Mean diameter	790 m (primary)
Synodic rotation period	3.7387±0.0013 h
Geometric albedo	0.27+0.25; −0.06
Spectral type	Sq; V–R = 0.455±0.025
Absolute magnitude (H)	17.62±0.04 (V-band)

152830 Dinkinesh (provisional designation 1999 VD₅₇) is a binary main-belt asteroid about 790 meters (2,600 feet) in diameter. It was discovered by the Lincoln Near-Earth Asteroid Research (LINEAR) survey at Socorro, New Mexico on 4 November 1999. Dinkinesh, the name borrowed from an Ethiopian word for the Lucy fossil, was the first flyby target of NASA's Lucy mission, which approached 425 km (264 mi) from the asteroid on 1 November 2023.^[9] During the flyby, the Lucy spacecraft discovered that Dinkinesh has a contact-binary natural satellite, named Selam, which is 220 meters (720 ft) in diameter. Dinkinesh is the smallest main-belt asteroid explored by spacecraft yet, though some smaller near-Earth asteroids have also been explored.

^ ^a ^b ^c Cite error: The named reference jpldata was invoked but never defined (see the help page).
^ Cite error: The named reference MPC-object was invoked but never defined (see the help page).
^ Cite error: The named reference NASA-20231102 was invoked but never defined (see the help page).
^ Cite error: The named reference Levison2024 was invoked but never defined (see the help page).
^ Cite error: The named reference McFadden2023 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Bolin2023 was invoked but never defined (see the help page).
^ Cite error: The named reference deLeon2023 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Mottola2023-09 was invoked but never defined (see the help page).
^ Cite error: The named reference NASA-20230911 was invoked but never defined (see the help page).