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(144898) 2004 VD17

Asteroid

Field	Value
minorplanet	yes
background	#FFC2E0
name
discoverer	LINEAR
discovered	7 November 2004
mp_category	{{Ubl
orbit_ref
observation_arc	17.8 years
uncertainty	0
epoch	2022-Jan-21 (JD 2459600.5)
semimajor	1.5079 AU
perihelion	0.62008 AU
aphelion	2.3958 AU
eccentricity	0.58878
period	1.85 yr (676.34 d)
inclination	4.2239°
asc_node	224°
arg_peri	90.97°
mean_anomaly	133.93°
mean_diameter	320m
580m (assumed)
0.5–1.0 km (CNEOS)
mass
spectral_type	E
abs_magnitude	18.8
mean_motion	/ day
rotation	1.99 h
moid	0.0015 AU

**(144898) ** (provisional designation ****) is a sub-kilometer asteroid, classified as near-Earth object of the Apollo group once thought to have a low probability of impacting Earth on 4 May 2102. It reached a Torino Scale rating of 2 and a Palermo scale rating of −0.25 (an impact hazard of about 56% of the background level). With an observation arc of 17 years it is known that closest Earth approach will occur two days earlier on 2 May 2102 at a distance of about 5.5 million km.

Date	JPL SBDB
nominal geocentric
distance	uncertainty
region
([3-sigma](3-sigma))
2032-05-01		± 127 km
2102-05-02		± 50 thousand km
2196-05-05		± 354 thousand km

History

was discovered on 7 November 2004, by the NASA-funded LINEAR asteroid survey. The object is estimated by NASA's Near Earth Object Program Office to be 580 meters in diameter with an approximate mass of .

Being approximately 580 meters in diameter, if were to impact land, it would create an impact crater about 10 kilometres wide and generate an earthquake of magnitude 7.4.

Elevated risk estimate in 2006

From February to May 2006, was listed with a Torino Scale impact risk value of 2, only the second asteroid in risk-monitoring history to be rated above value 1. With an observation arc of 1511 days, it was estimated to have a 1 in 1320 chance of impacting on 4 May 2102. The Torino rating was lowered to 1 after additional observations on 20 May 2006, and finally dropped to 0 on 17 October 2006.

2008 observations

As of 4 January 2008, the Sentry Risk Table assigned a Torino value of 0 and an impact probability of 1 in 58.8 million for 4 May 2102. This value was far below the background impact rate of objects this size. Further observations allowed it to be removed from the Sentry Risk Table on 14 February 2008.

It will pass 0.021 AU from the Earth on 1 May 2032, allowing a refinement to the orbit.

Properties

It has a spectral type of E. This suggests that the asteroid has a high albedo and is on the smaller size range for an object with an absolute magnitude of 18.8.

References

|author-link=David Morrison (astrophysicist) |url-status=dead

|archive-url=https://web.archive.org/web/20080301214903/http://neo.jpl.nasa.gov:80/risk/removed.html |url-status=dead |archive-date=2008-03-01

|url-status=dead

|archive-url=https://web.archive.org/web/20211212184929/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272004+VD17%27&START_TIME=%272032-May-01+22%3A37%27&STOP_TIME=%272032-May-02%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27 |archive-date=2021-12-12 |url-status=live

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

apollo-asteroids potentially-hazardous-asteroids discoveries-by-linear near-earth-objects-removed-from-the-sentry-risk-table astronomical-objects-discovered-in-2004

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