Discovery [1] [2] | |
---|---|
Discovered by | Siding Spring Srvy. |
Discovery site | Siding Spring Obs. |
Discovery date | 27 November 2005 |
Designations | |
(277475) 2005 WK4 | |
2005 WK4 | |
Apollo · NEO · PHA [1] [2] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 8.71 yr (3,180 days) |
Aphelion | 1.2506 AU |
Perihelion | 0.7707 AU |
1.0106 AU | |
Eccentricity | 0.2374 |
1.02 yr (371 days) | |
81.040° | |
0° 58m 12.36s / day | |
Inclination | 9.8433° |
138.14° | |
74.063° | |
Earth MOID | 0.0037 AU ·1.4 LD |
Physical characteristics | |
Dimensions | 0.25±0.05 km [lower-alpha 1] 0.284 km (calculated) [3] |
2.595±0.002 h [4] 2.7±0.1 h [lower-alpha 1] 2.73±0.05 h [5] | |
0.20 (assumed) [3] | |
S k [6] · S (assumed) [3] B–V = 0.677±0.025 [6] V–R = 0.446±0.019 [6] V–I = 0.750±0.024 [6] | |
20.1 [1] [3] | |
(277475) 2005 WK4, provisional designation 2005 WK4, is a stony, sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group that passed Earth within 8.2 lunar distances on 8 August 2013. [7] It was discovered on 27 November 2005, by astronomers of the Siding Spring Survey at Siding Spring Observatory, Australia. [2]
In August 2013, 2005 WK4 was radar-imaged by the Deep Space Network dish at Goldstone Observatory, United States, [7] and had been observed previously at Arecibo Observatory in July 2012 (this was not a close approach though). [8]
2005 WK4 measures approximately 250 meters in diameter, and has a rotation period of 2.595 hours. [3] [4] [lower-alpha 1] Its spectral type is that of an Sk-subtype, which transitions from the stony S-type to the uncommon K-type asteroids. [6]
2004 FH is a micro-asteroid and near-Earth object of the Aten group, approximately 30 meters in diameter, that passed just 43,000 km (27,000 mi) above the Earth's surface on 18 March 2004, at 22:08 UTC. It was the 11th closest approach to Earth recorded as of 21 November 2008. The asteroid was first observed on 16 March 2004, by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico.
4197 Morpheus, provisional designation 1982 TA, is a highly eccentric asteroid and near-Earth object of the Apollo group, approximately 3 kilometers in diameter. It was discovered on 11 October 1982, by American astronomers Eleanor Helin and Eugene Shoemaker at Palomar Observatory in California, United States. The asteroid was later named for Morpheus from Greek mythology.
(480808) 1994 XL1 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Aten group, approximately 200 meters (700 feet) in diameter. It was discovered on 6 December 1994, by Scottish–Australian astronomer Robert McNaught at Siding Spring Observatory in Australia. It was one of the first asteroids discovered to have a semi-major axis less than Venus.
3752 Camillo is an inclined contact-binary asteroid, classified as near-Earth object of the Apollo group, approximately 2.3 kilometers in diameter. It was discovered on 15 August 1985, by astronomers Eleanor Helin and Maria Barucci using a 0.9-metre (35 in) telescope at the CERGA Observatory in Caussols, France. Lightcurve studies by Petr Pravec in 1998 suggest that the assumed S-type asteroid has an elongated shape and a longer-than average rotation period of 38 hours.
4450 Pan is a highly eccentric asteroid and contact binary, classified as a potentially hazardous asteroid and near-Earth object of the Apollo group, approximately 1.1 kilometers in diameter. It was discovered on 25 September 1987, by American astronomers Eugene and Carolyn Shoemaker at Palomar Observatory in California, United States. It was named after Pan from Greek mythology.
(5496) 1973 NA, is a very eccentric and heavily tilted asteroid, classified as near-Earth object of the Apollo group, approximately 2 kilometers in diameter. It was discovered on 4 July 1973, by American astronomer Eleanor Helin at the U.S. Palomar Observatory in California. At the time of its discovery, it was the most highly inclined minor planet known to exist. It may be the parent body of the Quadrantids.
(6491) 1991 OA is a highly eccentric, stony asteroid, classified as near-Earth object and potentially hazardous asteroid, approximately half a kilometer in diameter. It was discovered on 16 July 1991, by American astronomer Henry E. Holt at the U.S. Palomar Observatory in California.
(7482) 1994 PC1 is a stony asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.1 kilometers in diameter. It was discovered on 9 August 1994, by astronomer Robert McNaught at the Siding Spring Observatory in Coonabarabran, Australia. With an observation arc of 47 years it has a very well known orbit and was observed by Goldstone radar in January 1997. The 2022 approach has been observed every month since August 2021.
(416151) 2002 RQ25 is a carbonaceous asteroid of the Apollo group, classified as near-Earth object and potentially hazardous asteroid, approximately 0.2 kilometers in diameter. It was discovered on 3 September 2002, by the Campo Imperatore Near-Earth Object Survey (CINEOS) at the Italian Campo Imperatore Observatory, located in the Abruzzo region, east of Rome.
(7335) 1989 JA, provisional designation 1989 JA, is a stony asteroid of the Apollo group, classified as near-Earth object and potentially hazardous asteroid, approximately 1 kilometer in diameter. It was discovered on 1 May 1989, by American astronomer Eleanor Helin at the U.S. Palomar Observatory in California. On 27 May 2022, the asteroid made a close approach 0.027 astronomical units from Earth. During the close approach, optical observations detected signs of an orbiting satellite, which was later confirmed by radar imaging at NASA's Goldstone Solar System Radar in California.
(214869) 2007 PA8 is an asteroid and slow rotator, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.4 kilometers in diameter.
(471240) 2011 BT15, provisional designation 2011 BT15, is a stony, sub-kilometer sized asteroid and fast rotator, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group. It had been one of the objects with the highest impact threat on the Palermo Technical Impact Hazard Scale.
(192642) 1999 RD32, provisional designation: 1999 RD32, is an asteroid and suspected contact binary on an eccentric orbit, classified as a large near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 5 kilometers (3 miles) in diameter. It was discovered on 8 September 1999, at a magnitude of 18, by astronomers of the LINEAR program using its 1-meter telescope at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, United States. The asteroid is likely of carbonaceous composition and has a rotation period of 17.08 hours.
(388188) 2006 DP14, provisional designation 2006 DP14, is a sub-kilometer sized, peanut-shaped asteroid on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. This contact binary was discovered on 23 February 2006, by astronomers of the LINEAR program at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. On 10 February 2014, it passed 6.25 lunar distances from Earth. The asteroid is approximately 400 meters in diameter and has a rotation period of 5.77 hours.
2001 AV43 is a very small, monolithic asteroid and fast rotator, classified as a near-Earth object of the Apollo group, approximately 30 meters (98 feet) in diameter. It was first observed on 5 January 2001, by astronomers of the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The presumed S-type asteroid has a rotation period of only 10 minutes. It has an exceptionally low MOID of 0.66 lunar distance (LD) and will approach Earth at 0.81 LD on 11 November 2029.
(436724) 2011 UW158, provisionally known as 2011 UW158, is a stony, walnut-shaped asteroid and fast rotator, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 300 meters in diameter. It was discovered on 25 October 2011, by Pan-STARRS at Haleakala Observatory on the island of Maui, Hawaii, in the United States.
(190166) 2005 UP156 is a stony asteroid and binary system, classified as near-Earth object of the Apollo group, approximately 1 kilometer in diameter. It was discovered on 31 October 2005, by astronomers of the Spacewatch survey at the Kitt Peak National Observatory in Arizona, United States. Its minor-planet moon with an orbital period of 40.25 hours was discovered in 2017.
(16960) 1998 QS52 (prov. designation:1998 QS52) is a stony asteroid on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 4.1 kilometers (2.5 mi) in diameter. It was discovered on 25 August 1998, by astronomers of the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. This asteroid is one of the largest potentially hazardous asteroid known to exist.
2013 GM3 is a micro-asteroid, classified as near-Earth object of the Aten group, approximately 20 meters in diameter. It was first observed on 3 April 2013, by astronomers of the Mount Lemmon Survey conducted at the Mount Lemmon Observatory near Tucson, Arizona, United States.
2016 DV1 is a near-Earth asteroid estimated to be roughly 29–65 meters (95–210 feet) in diameter. It is a fast rotating asteroid of the Apollo group which was first observed by the Mount Lemmon Survey on 28 February 2016, just days before it passed Earth at 1 lunar distance (LD) on 3 March 2016. The elongated fast rotator has a rotation period of 303 seconds. It was recovered in February 2021 as it was about to pass Earth on 3 March 2021 at a distance of 0.0053 AU (2.1 LD; 790,000 km; 490,000 mi).