Trisha Shetty (Editor)

(242450) 2004 QY2

Updated on
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Discovery date
20 August 2004

Minor planet category
Apollo, NEO,PHA

20 August 2004

Discovery site
Siding Spring Observatory

MPC designation
(242450) 2004 QY2

Observation arc
4242 days (11.61 yr)

Absolute magnitude

Asteroid group
Apollo asteroid

People also search for
(144908) 2004 YH32

Discovered by
Siding Spring Survey (E12)0.5-m Uppsala Schmidt

1.6013 AU (239.55 Gm) (Q)

(242450) 2004 QY2 is a large Apollo near-Earth asteroid and potentially hazardous object. It has a well determined orbit with an observation arc of 7 years and an uncertainty parameter of 0. 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.

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

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


(242450) 2004 QY2 Wikipedia