(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
- 1 2 "MPEC 2004-Q27 : 2004 QY2". IAU Minor Planet Center. 2004-08-22. Retrieved 2012-06-17. (K04Q02Y)
- 1 2 3 4 5 6 "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.
- 1 2 "(242450) 2004 QY2". The Near-Earth Asteroids Data Base at E.A.R.N. Retrieved 2012-06-17.
- 1 2 "JPL Small-Body Database Search Engine: PHAs and H < 15 (mag)". JPL Solar System Dynamics. Retrieved 2013-09-06.
- ↑ "JPL Close-Approach Data: 242450 (2004 QY2)" (2012-06-06 last obs and observation arc=7.79 years). Retrieved 2012-06-17.
- ↑ "Major News about Minor Objects". hohmanntransfer. 2004-08-22. Retrieved 2013-09-06.
- ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2013-09-06.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- (242450) 2004 QY2 at the JPL Small-Body Database
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