astro.wikisort.org - Asteroid

2015 AZ₄₃ (also written 2015 AZ43) is an Apollo near-Earth asteroid roughly 70 meters in diameter. On 10 February 2015 with a 29.5-day observation arc, it showed a 1 in 5,880 chance of impacting Earth on 27 February 2107.[3] However, the NEODyS nominal best-fit orbit shows that 2015 AZ₄₃ will be 2.8 AU (420,000,000 km; 260,000,000 mi) from Earth on 27 February 2107.[5] A (non-impacting) Earth close approach in 2056 makes future trajectories diverge.[6] It was removed from the JPL Sentry Risk Table on 23 February 2015 using JPL solution 26 with an observation arc of 40 days that included radar data.[7]

2015 AZ₄₃

Discovery[1]
Discovered by	Pan-STARRS (F51)
Discovery date	11 January 2015
Designations
MPC designation	2015 AZ43
Minor planet category	Apollo NEO[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 5
Observation arc	45 days
Aphelion	2.75773 AU (412.551 Gm) (Q)
Perihelion	0.98830226 AU (147.847914 Gm) (q)
Semi-major axis	1.87301 AU (280.198 Gm) (a)
Eccentricity	0.472347 (e)
Orbital period (sidereal)	2.56 yr (936.29 d)
Mean anomaly	123.5461° (M)
Mean motion	0° 23m 4.187s / day (n)
Inclination	4.52198° (i)
Longitude of ascending node	337.42980° (Ω)
Argument of perihelion	181.78786° (ω)
Earth MOID	0.00161778 AU (242,016 km)
Jupiter MOID	2.23908 AU (334.962 Gm)
Physical characteristics
Dimensions	~70 meters[3] 50–120 meters[4]
Synodic rotation period	0.59992 h (35.995 min)
Absolute magnitude (H)	23.5[2]

With an absolute magnitude of 23.5,[2] the asteroid is about 50–120 meters in diameter.[4]

2015 flyby

2015 AZ₄₃ was discovered on 11 January 2015 by Pan-STARRS at an apparent magnitude of 20 using a 1.8-meter (71 in) Ritchey–Chrétien telescope.[1] On 15 February 2015 the asteroid passed 0.0197 AU (2,950,000 km; 1,830,000 mi) from Earth.[8] The Goldstone Deep Space Network detected the asteroid on 18–19 February 2015, but the signal was not strong enough for delay-Doppler imaging.[9]

References

External links

• 2015 AZ43 Orbit – Minor Planet Center
• 2015 AZ43 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• 2015 AZ43 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical Properties · Summary
• 2015 AZ43 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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