Discovery [1] [2] | |
---|---|
Discovered by | SSS |
Discovery site | Siding Spring Obs. |
Discovery date | 20 August 2004 |
Designations | |
(242450) 2004 QY2 | |
2004 QY2 | |
Apollo · NEO · PHA [1] [3] | |
Orbital characteristics [3] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 11.61 yr (4,242 days) |
Aphelion | 1.6013 AU |
Perihelion | 0.5666 AU |
1.0840 AU | |
Eccentricity | 0.4773 |
1.13 yr (412 days) | |
123.98 ° | |
0° 52m 23.88s / day | |
Inclination | 37.026° |
295.31° | |
104.96° | |
Earth MOID | 0.0469 AU · 18.3 LD |
Physical characteristics | |
2.914±0.084 km
[4] 3.320 km [5] | |
0.274±0.044 [4] | |
14.7 [1] [3] | |
(242450) 2004 QY2 ( prov. designation: 2004 QY2) is an asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 3 kilometers (2 miles) in diameter. 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. [2] It is one of the largest potentially hazardous asteroids known to exist. [6]
2004 QY2 orbits the Sun at a distance of 0.6–1.6 AU once every 14 months (412 days; semi-major axis of 1.08 AU). Its orbit has an eccentricity of 0.48 and an inclination of 37 ° with respect to the ecliptic. [3] The body's observation arc begins with its official discovery observation at Siding Spring. [1]
The object is a member of the Apollo asteroids, the largest subgroup of near-Earth asteroids which cross the orbit of Earth. Unlike many other members of this dynamical group, 2004 QY2 is not a Mars-crosser, as its aphelion is too small to cross the orbit of the Red Planet at 1.66 AU. [3]
With an absolute magnitude of 14.7, 2004 QY2 is one of the brightest potentially hazardous asteroids ever discovered (see PHA-list). [6] [7] It has an Earth minimum orbital intersection distance of 0.0469 AU (7,020,000 km), which translates into 18.3 lunar distances. [3] On 29 July 2012, it passed Earth at a distance of 0.4314 AU (64,540,000 km; 40,100,000 mi). [3]
Due to its originally estimated size of 5.5 kilometers, 2004 QY2 was one of the largest objects to appear on the Sentry Risk Table. [8] It was removed from the Sentry Risk Table on 25 August 2004. [9]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 2004 QY2 has an albedo of 0.274, and it measures 2.914 and 3.320 kilometers in diameter, respectively. [4] [5]
As of 2018, no rotational lightcurve of 2004 QY2 has been obtained from photometric observations. The body's rotation period, shape and spin axis remain unknown. [10] In addition, the body's spectral type has never been assessed. [3] [10]
This minor planet was numbered by the Minor Planet Center on 26 June 2006. [11] As of 2018, it has not been named. [1]
Discovery [1] [2] | |
---|---|
Discovered by | SSS |
Discovery site | Siding Spring Obs. |
Discovery date | 20 August 2004 |
Designations | |
(242450) 2004 QY2 | |
2004 QY2 | |
Apollo · NEO · PHA [1] [3] | |
Orbital characteristics [3] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 11.61 yr (4,242 days) |
Aphelion | 1.6013 AU |
Perihelion | 0.5666 AU |
1.0840 AU | |
Eccentricity | 0.4773 |
1.13 yr (412 days) | |
123.98 ° | |
0° 52m 23.88s / day | |
Inclination | 37.026° |
295.31° | |
104.96° | |
Earth MOID | 0.0469 AU · 18.3 LD |
Physical characteristics | |
2.914±0.084 km
[4] 3.320 km [5] | |
0.274±0.044 [4] | |
14.7 [1] [3] | |
(242450) 2004 QY2 ( prov. designation: 2004 QY2) is an asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 3 kilometers (2 miles) in diameter. 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. [2] It is one of the largest potentially hazardous asteroids known to exist. [6]
2004 QY2 orbits the Sun at a distance of 0.6–1.6 AU once every 14 months (412 days; semi-major axis of 1.08 AU). Its orbit has an eccentricity of 0.48 and an inclination of 37 ° with respect to the ecliptic. [3] The body's observation arc begins with its official discovery observation at Siding Spring. [1]
The object is a member of the Apollo asteroids, the largest subgroup of near-Earth asteroids which cross the orbit of Earth. Unlike many other members of this dynamical group, 2004 QY2 is not a Mars-crosser, as its aphelion is too small to cross the orbit of the Red Planet at 1.66 AU. [3]
With an absolute magnitude of 14.7, 2004 QY2 is one of the brightest potentially hazardous asteroids ever discovered (see PHA-list). [6] [7] It has an Earth minimum orbital intersection distance of 0.0469 AU (7,020,000 km), which translates into 18.3 lunar distances. [3] On 29 July 2012, it passed Earth at a distance of 0.4314 AU (64,540,000 km; 40,100,000 mi). [3]
Due to its originally estimated size of 5.5 kilometers, 2004 QY2 was one of the largest objects to appear on the Sentry Risk Table. [8] It was removed from the Sentry Risk Table on 25 August 2004. [9]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 2004 QY2 has an albedo of 0.274, and it measures 2.914 and 3.320 kilometers in diameter, respectively. [4] [5]
As of 2018, no rotational lightcurve of 2004 QY2 has been obtained from photometric observations. The body's rotation period, shape and spin axis remain unknown. [10] In addition, the body's spectral type has never been assessed. [3] [10]
This minor planet was numbered by the Minor Planet Center on 26 June 2006. [11] As of 2018, it has not been named. [1]