astro.wikisort.org - Asteroid

2014 SC₃₂₄ is a sub-kilometer asteroid and fast rotator, classified as a near-Earth object of the Apollo group, approximately 50 meters in diameter.[2] It was first observed on 30 September 2014, by the Mount Lemmon Survey at an apparent magnitude of 21 using a 1.5-meter (59 in) reflecting telescope.[1] With an absolute magnitude of 24.3,[2] the asteroid is about 37–85 meters in diameter.[3]

2014 SC₃₂₄

Discovery[1]
Discovered by	Mt. Lemmon Survey (G96)
Discovery date	30 September 2014
Designations
MPC designation	2014 SC324
Minor planet category	Apollo NEO[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 1
Observation arc	29 days w/Radar
Aphelion	2.93880 AU (439.638 Gm) (Q)
Perihelion	0.91503 AU (136.887 Gm) (q)
Semi-major axis	1.92691 AU (288.262 Gm) (a)
Eccentricity	0.52513 (e)
Orbital period (sidereal)	2.67 yr (976.99 d)
Mean anomaly	152.737° (M)
Mean motion	0° 22m 6.521s / day (n)
Inclination	1.65403° (i)
Longitude of ascending node	210.19563° (Ω)
Argument of perihelion	221.35334° (ω)
Earth MOID	0.000606726 AU (90,764.9 km)
Physical characteristics
Dimensions	37–85 m (generic)[3]
Synodic rotation period	0.36156 h (21.694 min)
Apparent magnitude	24-29 (2014–2015)
Absolute magnitude (H)	24.3[2]

Description

The preliminary orbit with a short observation arc of 2 days showed that the asteroid had a very small chance of passing 0.000125 AU (18,700 km; 11,600 mi) from the Moon or 0.0012 AU (180,000 km; 110,000 mi) from Earth on about 23 October 2014.[4] But with an observation arc of 10 days, the nominal (best fit) orbit showed that on 24 October 2014 the asteroid would pass 0.0038 AU (570,000 km; 350,000 mi) (1.5 LD) from Earth and even further from the Moon.[5] The asteroid peaked at apparent magnitude 13.5,[6] placing it in the range of amateurs with roughly 0.25-meter (10 in) telescopes.

It was removed from the Sentry Risk Table on 10 October 2014 using JPL solution #5 with a 10-day observation arc.[7]

It was observed by Goldstone radar on 24–25 October 2014.[8]

References

External links

• Near-Earth Asteroid 2014 SC324: an exceptional movie (Virtual Telescope Project – 25 October 2014)
• 2014 SC324 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• 2014 SC324 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical Properties · Summary
• 2014 SC324 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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