2012 DA14

Frae Wikipedia
Lowp tae: navigation, rake
2012 DA14
Radar-2012DA14-Goldstone.jpg
Goldstone radar collage
o 2012 DA14 on 15–16 Februar 2013.
Discovery
Discovered bi OAM Observatory,
La Sagra
(J75)
0.45-m Reflector
Discovery date Februar 23, 2012
Designations
MPC designation 2012 DA14
Minor planet category Post 2013-Feb-15: Aten
Pre-2013: Apollo NEO
Orbital characteristics
Epoch 2013-Apr-18
(Uncertainty=0)
Aphelion 0.9917 AU (Q)
Perihelion 0.8289 AU (q)
Semi-major axis 0.9103 AU (a)
Eccentricity 0.0894
Orbital period 317.2 days
Mean anomaly 231.0° (M)
Inclination 11.60°
Longitude o ascendin node 146.9°
Argument o perihelion 195.5°
Pheesical characteristics
Dimensions ~45 meters (148 ft)
20 m × 40 m
(66 ft × 130 ft)
(elongatit)
(Geometric mean = 18 m)
18 meters (59 ft)
Escape velocity ~0.014 meters (0.55 in)
per seicont
Rotation period 9 hr
Albedo 0.44 ± 0.20
Spectral type L-type
Apparent magnitude 7.2 (2013 peak)
Absolute magnitude (H) 24.1
25.29 HV; 24.5 HR
24.4 (2012 estimate)

2012 DA14 is a near-Yird asteroid wi an estimatit diameter o 30 meters (98 ft) an an estimatit mass o 40,000 metric tons. Afore radar imagin, estimates for the diameter wur 45–50 meters.[1] Durin its 2013 close passage, the asteroid passed 27,700 km (17,200 mi) frae the surface o Yird.[2] This is a record close approach for a kent object o this size.[2] Aboot 16 oors afore the closest approach o 2012 DA14, an asteroid entered Yird's atmosphere above Roushie, which wis, however, unrelatit tae it acause it haed a signeeficantly different orbit.[3][4][5]

References[eedit | eedit soorce]

  1. "WayBack Machine archive from 25 Aug 2012". Wayback Machine. 2012-08-25. Retrieved 2013-01-10. 
  2. 2.0 2.1 Paul Chodas and Don Yeomans (February 1, 2013). "Asteroid 2012 DA14 To Pass Very Close to the Earth on February 15, 2013". NASA/JPL Near-Earth Object Program Office. Retrieved 2013-02-01. 
  3. Don Yeomans and Paul Chodas (March 1, 2013). "Additional Details on the Large Fireball Event over Russia on Feb. 15, 2013". NASA/JPL Near-Earth Object Program Office. Retrieved 2013-03-02. 
  4. "Russia Meteor Not Linked to Asteroid Flyby". NASA. Retrieved 15 February 2013. 
  5. "Russian Asteroid Strike". ESA.int. Retrieved 16 February 2013.