367943 Duende

367943 Duende
	Goldstone radar collage of Duende on 15–16 February 2013
Discovery
Discovered by	OAM
Discovery site	La Sagra Obs.
Discovery date	23 February 2012
Designations
MPC designation	(367943) Duende
Named after	Duende; (Iberian/Filipino mythology)
Alternative designations	2012 DA14
Minor planet category	NEO; Aten; Atira; Apollo (pre-2013);
Orbital characteristics
	Epoch 23 March 2018 (JD 2458200.5)
	Uncertainty parameter 0
Observation arc	364 days
Aphelion	0.9916 AU
Perihelion	0.8289 AU
Semi-major axis	0.9103 AU
Eccentricity	0.0894
Orbital period (sidereal)	0.87 yr (317 days)
Mean anomaly	113.74°
Mean motion	1° 8m 5.64s / day
Inclination	11.609°
Longitude of ascending node	146.96°
Argument of perihelion	195.60°
Earth MOID	9.52648×10−5 AU (0.037 LD)
Physical characteristics
Dimensions	20 m × 40 m (elongated)
Mean diameter	18 m; 45–50 m; 47 m (calculated);
Synodic rotation period	8 h (lower limit); 8.95±0.08 h; 9.1±0.5 h; 9.485±0.144 h; 11.0±1.8 h;
Geometric albedo	0.20 (assumed); 0.44±0.20;
Spectral type	L; S/V;
Apparent magnitude	7.2 (2013 peak)
Absolute magnitude (H)	24.0; 24.4 (2012-estimate); 24.78±0.11 (R); 25.0±0.2;

367943 Duende (provisional designation 2012 DA₁₄) is a micro-asteroid and a near-Earth object of the Aten and Atira group, approximately 30 meters (98 ft) in diameter. It was discovered by astronomers of the Astronomical Observatory of Mallorca at its robotic La Sagra Observatory in 2012, and named for the duende, a goblin-like creature from Iberian mythology and folklore. Duende is likely an uncommon L-type asteroid and significantly elongated. For an asteroid of its size, it has a relatively long rotation period of 9.485 hours.

On 15 February 2013, Duende passed at a record distance of 27,700 km (17,200 mi) or 4.3 Earth radii from Earth's surface. Due to its close passage, its orbit was perturbed significantly enough that it changed from an Apollo asteroid to an Aten asteroid. Duende's passage also coincided with the completely unrelated Chelyabinsk meteor, which entered Earth's atmosphere above Russia just 16 hours earlier.