(163348) 2002 NN4

(163348) 2002 NN₄
	2002 NN4 orbits between Venus and Mars
Discovery
Discovered by	LINEAR
Discovery site	Lincoln Lab's ETS
Discovery date	9 July 2002
Designations
MPC designation	(163348) 2002 NN4
Alternative designations	2002 NN4
Minor planet category	NEO · PHA · Aten
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 0 · 2
Observation arc	14.16 yr (5,171 d)
Aphelion	1.2572 AU
Perihelion	0.4956 AU
Semi-major axis	0.8764 AU
Eccentricity	0.4345
Orbital period (sidereal)	300 days
Mean anomaly	83.774°
Mean motion	1° 12m 4.68s / day
Inclination	5.4177°
Longitude of ascending node	259.48°
Argument of perihelion	222.23°
Earth MOID	0.0069 AU (2.69 LD)
Physical characteristics
Mean diameter	0.613 km; 0.735±0.243 km;
Synodic rotation period	14.50±0.03 h
Geometric albedo	0.030±0.027; 0.047;
Spectral type	X
Absolute magnitude (H)	20.1

(163348) 2002 NN₄ (prov. designation: 2002 NN₄) is a dark, sub-kilometer near-Earth object and potentially hazardous asteroid of the Aten group that flew by Earth on 6 June 2020. The highly elongated X-type asteroid has a rotation period of 14.5 hours and measures approximately 0.7 kilometers (0.4 miles) in diameter.^[2]^[6] It was discovered by LINEAR at the Lincoln Laboratory's Experimental Test Site in New Mexico on 9 July 2002.^[1]

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^ ^a ^b ^c Cite error: The named reference Perna-2018b was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Masiero-2017 was invoked but never defined (see the help page).
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^ Cite error: The named reference lcdb was invoked but never defined (see the help page).

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Discovery^[1]
2002 NN₄ orbits between Venus and Mars
Discovered by	LINEAR
Discovery site	Lincoln Lab's ETS
Discovery date	9 July 2002
Designations
MPC designation	(163348) 2002 NN₄
Alternative designations	2002 NN₄
Minor planet category	NEO · PHA · Aten^[1]^[2]
Orbital characteristics^[2]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0^[2] · 2^[1]
Observation arc	14.16 yr (5,171 d)
Aphelion	1.2572 AU
Perihelion	0.4956 AU
Semi-major axis	0.8764 AU
Eccentricity	0.4345
Orbital period (sidereal)	300 days
Mean anomaly	83.774°
Mean motion	1° 12^m 4.68^s / day
Inclination	5.4177°
Longitude of ascending node	259.48°
Argument of perihelion	222.23°
Earth MOID	0.0069 AU (2.69 LD)
Physical characteristics
Mean diameter	0.613 km^[3] 0.735±0.243 km^[4]
Synodic rotation period	14.50±0.03 h^[5]^[a]
Geometric albedo	0.030±0.027^[4] 0.047^[3]
Spectral type	X^[3]
Absolute magnitude (H)	20.1^[1]^[2]^[4]