(242450) 2004 QY2

(242450) 2004 QY2
Discovery[1]
Discovered by Siding Spring Survey (E12)
0.5-m Uppsala Schmidt
Discovery date 2004 August 20
Designations
MPC designation (242450) 2004 QY2
Apollo NEO,
PHA[2]
Orbital characteristics[2]
Epoch 2012-Mar-14
(Uncertainty=0)[2]
Aphelion 1.6013 AU (Q)
Perihelion 0.56660 AU (q)
1.0839 AU (a)
Eccentricity 0.47730
1.13 yr
177.35° (M)
Inclination 37.025°
295.32°
104.96°
Physical characteristics
Dimensions 3.5 - 7.7 km[3]
15[2]

    (242450) 2004 QY2 is a large 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 5km, 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

    1. ↑ 1.0 1.1 "MPEC 2004-Q27 : 2004 QY2". IAU Minor Planet Center. 2004-08-22. Retrieved 2012-06-17. (K04Q02Y)
    2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "JPL Small-Body Database Browser: 242450 (2004 QY2)" (2012-06-06 last obs and observation arc=7.79 years). Jet Propulsion Laboratory. Retrieved 2012-06-17.
    3. ↑ 3.0 3.1 "(242450) 2004 QY2". The Near-Earth Asteroids Data Base at E.A.R.N. Retrieved 2012-06-17.
    4. ↑ 4.0 4.1 "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