2017 AG13

2017 AG₁₃

Discovery
Discovered by	Catalina Sky Survey
Discovery site	Mount Lemmon/Catalina Sky Survey (703)
Discovery date	January 7, 2017
Designations
Minor planet category	Aten asteroid
Orbital characteristics
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 6
Observation arc	2 days
Aphelion	1.37626 AU
Perihelion	0.55012 AU
Semi-major axis	0.96319 AU
Eccentricity	0.42886
Orbital period (sidereal)	0.95 years (345.27 days)
Mean anomaly	330.87°
Inclination	16.450°
Longitude of ascending node	289.26420°
Argument of perihelion	297.885°
Earth MOID	0.0000567 AU
Venus MOID	0.0555 AU
Physical characteristics
Dimensions	13–41 meters
Absolute magnitude (H)	26.1

2017 AG₁₃ is an Aten asteroid that made a close approach of 0.54 lunar distances from Earth on January 9, 2017. It was the largest asteroid to pass less than 1 lunar distance from Earth since 2016 QA₂ on August 28, 2016. The Catalina Sky Survey discovered it on January 7, 2017, only two days before its closest approach. At its brightest, 2017 AG₁₃ reached apparent magnitude 14.8. Shortly after, it moved too close to the Sun to be seen by telescopes.

The asteroid frequently makes close approaches to Earth, possibly passing as close as 127,000 kilometres (79,000 mi) to Earth on January 9, 2069, however it will most likely pass much further away.

2017 AG₁₃ is most likely 13–41 metres (43–135 feet) across, assuming a typical asteroid albedo of between 0.05 and 0.3.

External links

• Minor Planet Center flyby diagram
• Newfound Asteroid Gives Earth a Close Shave (space.com)
• Asteroid 2017 AG13 passed between the Earth and Moon and we hardly noticed (redorbit.com)