(242450) 2004 QY2

From Wikipedia, the free encyclopedia
Jump to: navigation, search
(242450) 2004 QY2
Discovery[1]
Discovered by Siding Spring Survey (E12)
0.5-m Uppsala Schmidt
Discovery date 20 August 2004
Designations
MPC designation (242450) 2004 QY2
Apollo, NEO,
PHA[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 4242 days (11.61 yr)
Aphelion 1.6013 AU (239.55 Gm) (Q)
Perihelion 0.56669 AU (84.776 Gm) (q)
1.0840 AU (162.16 Gm) (a)
Eccentricity 0.47722 (e)
1.13 yr (412.22 d)
319.99° (M)
0° 52m 23.916s / day (n)
Inclination 37.027° (i)
295.32° (Ω)
104.96° (ω)
Earth MOID 0.0481522 AU (7.20347 Gm)
Jupiter MOID 4.0465 AU (605.35 Gm)
Jupiter Tisserand parameter 5.441
Physical characteristics
Dimensions 3.5 - 7.7 km[3]
14.7[2]

(242450) 2004 QY2 is a large Apollo near-Earth asteroid and potentially hazardous object.[2] It has a well determined orbit with an observation arc of 7 years and an uncertainty parameter of 0,[2] it was discovered on 20 August 2004 by the Siding Spring Survey at an apparent magnitude of 16.5 using the 0.5-metre (20 in) Uppsala Southern Schmidt Telescope.[1]

Based on an absolute magnitude of 15,[2] the asteroid has an estimated diameter of 3.5 to 7.7 km.[3] 2004 QY2 is one of the largest potentially hazardous asteroids (PHA) discovered.[4] As of 2013 it has the brightest absolute magnitude of any PHA since its discovery,[4] on 29 July 2012 it passed Earth at a distance of 0.4314 AU (64,540,000 km; 40,100,000 mi).[5]

Given the estimated size of roughly 5 km, 2004 QY2 is one of the largest objects to appear on the Sentry Risk Table.[6] It was removed from the Sentry Risk Table on 25 August 2004.[7]

References[edit]

  1. ^ a b "MPEC 2004-Q27 : 2004 QY2". IAU Minor Planet Center. 2004-08-22. Retrieved 2012-06-17.  (K04Q02Y)
  2. ^ a b c d e f "JPL Small-Body Database Browser: 242450 (2004 QY2)" (2012-06-06 last obs and observation arc=7.79 years). Jet Propulsion Laboratory. Retrieved 7 April 2016. 
  3. ^ a b "(242450) 2004 QY2". The Near-Earth Asteroids Data Base at E.A.R.N. Retrieved 2012-06-17. 
  4. ^ a b "JPL Small-Body Database Search Engine: PHAs and H < 15 (mag)". JPL Solar System Dynamics. Retrieved 2013-09-06. 
  5. ^ "JPL Close-Approach Data: 242450 (2004 QY2)" (2012-06-06 last obs and observation arc=7.79 years). Retrieved 2012-06-17. 
  6. ^ "Major News about Minor Objects". hohmanntransfer. 2004-08-22. Retrieved 2013-09-06. 
  7. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2013-09-06. 

External links[edit]