2004 FH: Difference between revisions
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{{Short description|Near-Earth asteroid}} | |||
{{Use dmy dates|date=February 2018}} | {{Use dmy dates|date=February 2018}} | ||
{{Infobox planet | {{Infobox planet | ||
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| image = Asteroid 2004 FH.gif | | image = Asteroid 2004 FH.gif | ||
| image_scale = | | image_scale = | ||
| caption = Flyby of asteroid {{mp|2004 FH}} {{efn|name=image-description-extended}} | | caption = Flyby of asteroid {{mp|2004 FH}};{{efn|name=image-description-extended}} the object that flashes by is a man-made satellite. | ||
| discovery_ref = <ref name="jpldata" /><ref name="MPC-object" /> | | discovery_ref = <ref name="jpldata"/><ref name="MPC-object"/> | ||
| discoverer = [[ | | discoverer = [[LINEAR]] | ||
| discovery_site = [[Lincoln Laboratory's Experimental Test Site|Lincoln Lab's ETS]] | | discovery_site = [[Lincoln Laboratory's Experimental Test Site|Lincoln Lab's ETS]] | ||
| discovered = 16 March 2004 | | discovered = 16 March 2004 | ||
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| pronounced = | | pronounced = | ||
| named_after = | | named_after = | ||
| mp_category = [[Near-Earth object|NEO]]{{·}}[[Aten asteroid|Aten]]<ref name="jpldata" /> | | mp_category = [[Near-Earth object|NEO]]{{·}}[[Aten asteroid|Aten]]<ref name="jpldata"/> | ||
| orbit_ref = <ref name="jpldata" /> | | orbit_ref = <ref name="jpldata"/> | ||
| epoch = | | epoch = 21 Nov 2025 ([[Julian day|JD]] 2461000.5) | ||
| uncertainty = | | uncertainty = 1 | ||
| observation_arc = | | observation_arc = 6184 days (16.93 years) | ||
| aphelion = 1. | | aphelion = 1.0559 [[Astronomical unit|AU]] | ||
| perihelion = 0. | | perihelion = 0.5826 AU | ||
| semimajor = 0. | | semimajor = 0.8193 AU | ||
| eccentricity = 0. | | eccentricity = 0.2888 | ||
| period = 0. | | period = 0.7415 [[Julian year (astronomy)|yr]] (270.84 days) | ||
| mean_anomaly = | | mean_anomaly = 333.74[[Degree (angle)|°]] | ||
| mean_motion = {{Deg2DMS|1. | | mean_motion = {{Deg2DMS|1.3292|sup=ms}} / day | ||
| inclination = 0. | | inclination = 0.0549° | ||
| asc_node = | | asc_node = 258.20° | ||
| arg_peri = | | arg_peri = 69.180° | ||
| moid = 0. | | moid = 0.000484 AU | ||
| dimensions = 24 m {{small|(calculated)}}<ref name="lcdb" /><br />30 m {{small|(estimate)}}<ref name="news142"/> | | dimensions = 24 m {{small|(calculated)}}<ref name="lcdb"/><br/>30 m {{small|(estimate)}}<ref name="news142"/> | ||
| mass = <!-- 2.8{{e|7}} kg source?--> | | mass = <!-- 2.8{{e|7}} kg source?--> | ||
| rotation = {{ | | rotation = {{cvt|0.0504|h|min|lk=on}}<ref name="lcdb"/> | ||
| albedo = 0.20 {{small|(assumed)}}<ref name="lcdb" /> | | albedo = 0.20 {{small|(assumed)}}<ref name="lcdb"/> | ||
| spectral_type = [[S-type asteroid|S]] {{small|(assumed)}}<ref name="lcdb" /> | | spectral_type = [[S-type asteroid|S]] {{small|(assumed)}}<ref name="lcdb"/> | ||
| abs_magnitude = 25.7<ref name="jpldata" /> | | abs_magnitude = 25.7<ref name="jpldata"/> | ||
}} | }} | ||
'''2004 FH''' is a micro-[[asteroid]] and [[near-Earth object]] of the [[Aten asteroid|Aten group]], approximately 30 meters in diameter, that passed just {{convert| | '''2004 FH''' is a micro-[[asteroid]] and [[near-Earth object]] of the [[Aten asteroid|Aten group]], approximately 30 meters in diameter, that passed just {{convert|43000|km|abbr=on}} above the [[Earth]]'s surface on 18 March 2004, at 22:08 [[Coordinated Universal Time|UTC]]. It was the [[List of asteroid close approaches to Earth|11th-closest approach to Earth]] recorded {{As of|2008|11|21|lc=on}}.{{efn|name=record-definitions}} 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.<ref name="MPC-object"/> | ||
== Orbit and classification == | == Orbit and classification == | ||
[[File:2004fs56992main 2004.jpg|thumb|left|Trajectory of {{mp|2004 FH}} in the Earth–Moon system]] | [[File:2004fs56992main 2004.jpg|thumb|left|Trajectory of {{mp|2004 FH}} in the Earth–Moon system]] | ||
{{mp|2004 FH}} is an [[Aten asteroid]]. It passed 43,000 km from the Earth on 18 March 2004. For comparison, [[geostationary satellite]]s orbit Earth at 35,790 kilometers. Despite its small size, it is still the fourth largest asteroid detected coming closer to the Earth than the Moon. | {{mp|2004 FH}} is an [[Aten asteroid]]. It passed 43,000 km from the Earth on 18 March 2004. For comparison, [[geostationary satellite]]s orbit Earth at 35,790 kilometers. Despite its small size, it is still the fourth-largest asteroid detected coming closer to the Earth than the Moon. | ||
Had this object hit Earth, it would probably have detonated high in the [[Earth | Had this object hit Earth, it would probably have detonated high in the [[Atmosphere of Earth|atmosphere]]. It might have produced a blast measured in hundreds of kilotons of [[TNT]], but may not have produced any effect on the ground. It could also have been an [[Earth-grazing fireball]] if it had been much closer but not close enough to impact.{{citation needed|date=November 2017}}<!--infobox: MASS= 2.8{{e|7}} kg source?--> | ||
On 17 March 2044 the asteroid will pass no closer than {{convert|0.0116|AU| | On 17 March 2044 the asteroid will pass no closer than {{convert|0.0116|AU|e6km e6mi|abbr=unit|lk=off}} from the Earth.<ref name=jpl-close/> {{mp|2004 FH}} also has the distinction of having the lowest [[inclination]] of any known near-Earth asteroids. | ||
Two weeks later another asteroid approached even closer, {{mpl|2004 FU|162}}, which was smaller; and a few years later {{mpl|2009 DD|45}}, which was closer in size, passed by at similar distance. | Two weeks later another asteroid approached even closer, {{mpl|2004 FU|162}}, which was smaller; and a few years later {{mpl|2009 DD|45}}, which was closer in size, passed by at similar distance. | ||
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== Physical characteristics == | == Physical characteristics == | ||
{{mp|2004 FH}} is an assumed stony [[S-type asteroid]].<ref name="lcdb" /> | {{mp|2004 FH}} is an assumed stony [[S-type asteroid]].<ref name="lcdb"/> | ||
=== Rotation period === | === Rotation period === | ||
In March 2004, two rotational [[lightcurve]]s of {{mp|2004 FH}} were obtained from photometric observations by astronomers [[Petr Pravec]], [[Stefano Sposetti]] and [[Raoul Behrend]]. Lightcurve analysis gave a [[rotation period]] of 0.0504 hours (3.02 minutes) with a brightness amplitude of 1.16 and 0.75 [[Magnitude (astronomy)|magnitude]], respectively ({{small|[[LCDB quality code|U=3/2+]]}}).<ref name="lcdb" /><ref name="geneva-obs" /> | In March 2004, two rotational [[lightcurve]]s of {{mp|2004 FH}} were obtained from photometric observations by astronomers [[Petr Pravec]], [[Stefano Sposetti]] and [[Raoul Behrend]]. Lightcurve analysis gave a [[rotation period]] of 0.0504 hours (3.02 minutes) with a brightness amplitude of 1.16 and 0.75 [[Magnitude (astronomy)|magnitude]], respectively ({{small|[[LCDB quality code|U=3/2+]]}}).<ref name="lcdb"/><ref name="geneva-obs"/> | ||
This makes this object a [[List of fast rotators (minor planets)|fast rotator]], currently among the [[List of fast rotators (minor planets)#Periods 0.05–0.1 hour|Top 100]] known to exist. The photometric observations also revealed, that {{mp|2004 FH}} is a [[List of tumblers (small Solar System bodies)|tumbler]] with a non-principal axis rotation.<ref name="lcdb" /> | This makes this object a [[List of fast rotators (minor planets)|fast rotator]], currently among the [[List of fast rotators (minor planets)#Periods 0.05–0.1 hour|Top 100]] known to exist. The photometric observations also revealed, that {{mp|2004 FH}} is a [[List of tumblers (small Solar System bodies)|tumbler]] with a non-principal axis rotation.<ref name="lcdb"/> | ||
=== Diameter and albedo === | === Diameter and albedo === | ||
has been estimated to measure approximately 30 | has been estimated to measure approximately {{convert|30|m|abbr=off|sp=us}} in diameter.<ref name="news142"/> The ''Collaborative Asteroid Lightcurve Link'' assumes a standard [[astronomical albedo|albedo]] for stony asteroids of 0.20 and calculates a diameter of 24 meters based on an [[absolute magnitude]] of 25.7.<ref name="lcdb"/> | ||
== Notes == | == Notes == | ||
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{{reflist|30em|refs= | {{reflist|30em|refs= | ||
<ref name="jpldata">{{cite web | <ref name="jpldata">{{cite web |title=JPL Small-Body Database Browser: (2004 FH) |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3177202 |access-date=23 November 2017 |publisher=[[Jet Propulsion Laboratory]] |type=2004-03-19 last obs.}}</ref> | ||
<ref name=jpl-close>{{cite web | <ref name="jpl-close">{{cite web |title=JPL Close-Approach Data: (2004 FH) |url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004FH;cad=1#cad |access-date=23 March 2016 |type=last observation: 2004-03-19; [[Observation arc|arc]]: 3 days; [[Uncertainty Parameter U|uncertainty]]: 3}}</ref> | ||
<ref name="news142">{{cite web | <ref name="news142">{{cite web |last1=Chesley |first1=Steven R. |last2=Chodas |first2=Paul W. |date=March 17, 2004 |title=Recently Discovered Near-Earth Asteroid Makes Record-breaking Approach to Earth |url=https://cneos.jpl.nasa.gov/news/news142.html |access-date=23 November 2017 |publisher=NASA's Near Earth Object Program Office}}</ref> | ||
<ref name="MPC-object">{{cite web | <ref name="MPC-object">{{cite web |title=2004 FH |url=http://www.minorplanetcenter.net/db_search/show_object?object_id=2004+FH |access-date=23 November 2017 |work=Minor Planet Center}}</ref> | ||
<ref name="geneva-obs">{{cite web | <ref name="geneva-obs">{{cite web |last=Behrend |first=Raoul |author-link=Raoul Behrend |title=Asteroids and comets rotation curves – (2004 FH) |url=http://obswww.unige.ch/~behrend/page5cou.html#04f00h |access-date=23 November 2017 |publisher=[[Geneva Observatory]]}}</ref> | ||
<ref name="lcdb">{{cite web | <ref name="lcdb">{{cite web |title=LCDB Data for (2004) |url=http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=0%7C2004+FH |access-date=23 November 2017 |publisher=Asteroid Lightcurve Database (LCDB)}}</ref> | ||
}} <!-- end of reflist --> | }} <!-- end of reflist --> | ||
Latest revision as of 02:03, 8 November 2025
Template:Short description Template:Use dmy dates Script error: No such module "infobox".Script error: No such module "Check for unknown parameters".
2004 FH is a micro-asteroid and near-Earth object of the Aten group, approximately 30 meters in diameter, that passed just Script error: No such module "convert". above the Earth's surface on 18 March 2004, at 22:08 UTC. It was the 11th-closest approach to Earth recorded since 21 November 2008[update]Template:Dated maintenance category (articles)Script error: No such module "Check for unknown parameters"..Template:Efn 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.[1]
Orbit and classification
Template:Mp is an Aten asteroid. It passed 43,000 km from the Earth on 18 March 2004. For comparison, geostationary satellites orbit Earth at 35,790 kilometers. Despite its small size, it is still the fourth-largest asteroid detected coming closer to the Earth than the Moon.
Had this object hit Earth, it would probably have detonated high in the atmosphere. It might have produced a blast measured in hundreds of kilotons of TNT, but may not have produced any effect on the ground. It could also have been an Earth-grazing fireball if it had been much closer but not close enough to impact.Script error: No such module "Unsubst".
On 17 March 2044 the asteroid will pass no closer than Script error: No such module "convert". from the Earth.[2] Template:Mp also has the distinction of having the lowest inclination of any known near-Earth asteroids.
Two weeks later another asteroid approached even closer, Template:Mpl, which was smaller; and a few years later Template:Mpl, which was closer in size, passed by at similar distance.
Physical characteristics
Template:Mp is an assumed stony S-type asteroid.[3]
Rotation period
In March 2004, two rotational lightcurves of Template:Mp were obtained from photometric observations by astronomers Petr Pravec, Stefano Sposetti and Raoul Behrend. Lightcurve analysis gave a rotation period of 0.0504 hours (3.02 minutes) with a brightness amplitude of 1.16 and 0.75 magnitude, respectively (U=3/2+Script error: No such module "Check for unknown parameters".).[3][4]
This makes this object a fast rotator, currently among the Top 100 known to exist. The photometric observations also revealed, that Template:Mp is a tumbler with a non-principal axis rotation.[3]
Diameter and albedo
has been estimated to measure approximately Script error: No such module "convert". in diameter.[5] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 24 meters based on an absolute magnitude of 25.7.[3]
Notes
References
<templatestyles src="Reflist/styles.css" />
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b c d Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
<ref> tag with name "jpldata" defined in <references> is not used in prior text.Script error: No such module "Check for unknown parameters".
External links
- MPEC 2004-F24
- Images of 2004 FH at Klet
- Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Template:NeoDys
- Template:ESA-SSA
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata