2017 AG₁₃

2017 AG₁₃ is a small Aten asteroid that made a close approach of 0.54 lunar distances from Earth on January 9, 2017.[4] 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 observed it first on January 7, 2017, only two days before its closest approach. At its brightest, 2017 AG₁₃ reached apparent magnitude 12.2.[1][2] Shortly after, it moved too close to the Sun to be seen by telescopes.

2017 AG₁₃

Discovery [1]
Discovered by	CSS
Discovery site	Catalina Stn.
Discovery date	January 7, 2017 (first observed only)
Designations
MPC designation	2017 AG13
Minor planet category	NEO · Aten [1][2]
Orbital characteristics [2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 6[2] · 5[1]
Observation arc	2 days
Aphelion	1.3762 AU
Perihelion	0.5500 AU
Semi-major axis	0.9631 AU
Eccentricity	0.4289
Orbital period	345 days
Mean anomaly	84.963°
Mean motion	1° 2^m 34.08^s / day
Inclination	16.453°
Longitude of ascending node	289.25°
Argument of perihelion	297.92°
Earth MOID	0.000132757 AU (0.0517 LD)
Venus MOID	0.06864 AU[1]
Physical characteristics
Mean diameter	15–36 m (est. at 0.30–0.05)[3]
Absolute magnitude (H)	26.1[1][2]

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.[2][5]

Based on an absolute magnitude of 26.1, 2017 AG₁₃ is likely 15–36 metres (49–118 feet) across, assuming a typical asteroid albedo of between 0.05 and 0.3.[3]

References

1. "2017 AG13". Minor Planet Center. Retrieved January 12, 2020.
2. "JPL Small-Body Database Browser: (2017 AG13)" (2017-01-09 last obs.). Jet Propulsion Laboratory. Retrieved January 12, 2020.
3. "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved January 12, 2020.
4. "Newly discovered asteroid 2017 AG13 to flyby Earth at 0.53 LD". The Watchers - Daily news service. January 8, 2017. Retrieved February 2, 2017.
5. "Asteroid 2017 AG13 – Close approaches". NeoDyS-2, Asteroids – Dynamic Site. Retrieved January 12, 2020.

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, April 17, 2018
• 2017 AG13 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• 2017 AG13 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters