View source for (177049) 2003 EE16

{{DISPLAYTITLE:{{mp|(177049) 2003 EE|16}}}}
{{Use dmy dates|date=September 2020}}
{{Infobox planet
| minorplanet = yes
| background = #FFC2E0
| name = {{mp|(177049) 2003 EE|16}}
| discovery_ref = <ref name="MPEC2003-E34"/>
| discoverer = [[Spacewatch]]
| discovery_site = [[Kitt Peak National Observatory|Kitt Peak National Obs.]]
| discovered = 8 March 2003
| mpc_name = {{mp|(177049) 2003 EE|16}}
| mp_category = [[Near-Earth object|NEO]]{{·}}[[Potentially hazardous asteroid|PHA]]{{·}}[[Apollo asteroid|Apollo]]<ref name="jpldata" />
| orbit_ref = <ref name="jpldata"/>
| epoch = 13 January 2016 ([[Julian day|JD]] 2457400.5)
| aphelion = {{Convert|2.2878|AU|Gm|abbr=on|lk=on}}
| perihelion = {{Convert|0.54666|AU|Gm|abbr=on}}
| semimajor = {{Convert|1.4172|AU|Gm|abbr=on}}
| eccentricity = 0.61427
| period = 1.69 [[Julian year (astronomy)|yr]] (616.24 [[Julian year (astronomy)|d]])
| inclination = 0.64964°
| asc_node = 127.04°
| mean_anomaly = 296.40[[Degree (angle)|°]]
| arg_peri = 259.67°
| mean_diameter = {{val|0.320}} km<ref name="Wayback2003-04"/>
| mass = 5.1{{e|10}} kg (assumed)
| abs_magnitude = 19.7<ref name="jpldata"/>
| mean_motion = {{Deg2DMS|0.58419|sup=ms}} / day
| observation_arc = 4429 days (12.13 yr)
|earliest_precovery_date = 17 May 2002
| uncertainty = 0
| moid = {{Convert|9.93475E-5|AU|km|abbr=on}}
}}

'''{{mp|(177049) 2003 EE|16}}''', [[Provisional designation in astronomy|provisionally known]] as '''2003 EE16''', is an [[Apollo asteroid|Apollo]] [[near-Earth asteroid]] and [[potentially hazardous object]].<ref name=jpldata/> It was discovered on 8 March 2003 by [[Spacewatch|LPL/Spacewatch II]] at an [[apparent magnitude]] of 20 using a {{convert|1.8|m|in|adj=on|sp=us}} [[reflecting telescope]].<ref name="MPEC2003-E34"/> It has an estimated diameter of {{convert|320|m|sp=us}}.<ref name="Wayback2003-04"/> The asteroid was listed on [[Sentry (monitoring system)|Sentry Risk Table]] with a [[Torino Scale]] rating of 1 on 2 April 2003.<ref name="Wayback2003-04"/>

== Description ==

Many of the virtual impactors were located near the [[Curve fitting|nominal]] orbital solution and the asteroid has a low inclination relative to Earth's orbit.<ref name="spaceguard"/> Observation by the [[Very Large Telescope]] (VLT) 8 meter facilities on 22 May and 19 June 2003 when {{mp|2003 EE|16}} was very dim with an apparent magnitude between 24–25<ref group="note">At an [[apparent magnitude]] of 24, the asteroid was roughly 10 million times fainter than can be seen with the [[naked eye]].<br />Math: <math>(\sqrt[5]{100})^{24-6.5}= 10000000</math></ref> refined the orbit.<ref name="spaceguard"/> It was removed from the Sentry Risk Table on 28 May 2003.<ref name="removed"/>

{{mp|2003 EE|16}} has the smallest Earth [[Minimum orbit intersection distance]] (MOID) of any known [[potentially hazardous asteroid]].<ref name="jpl-search"/> The Earth MOID is {{convert|0.0000475|AU|km mi|abbr=on|lk=on}}.<ref name="jpl-search"/> Asteroids with a smaller Earth MOID are less than ~100 meters in diameter such as {{mpl|2013 XY|8}} and {{mpl|2010 TD|54}}. Earth impactors {{mpl|2008 TC|3}} and [[2014 AA]] had small Earth MOID values as they were on their impact approach when discovered.
{| class="wikitable sortable" style="text-align:left"
|+Close-approaches to Earth<ref name=jpl-close/>
|-
! Date !! Distance from Earth 
|-
| 2014-07-01 || {{convert|0.0966|AU|km mi|abbr=on|lk=on}} (37.6 [[Lunar distance (astronomy)|LD]])
|-
| 2041-07-01 || {{convert|0.0992|AU|km mi|abbr=on|lk=off}} (38.6 LD)
|-
| 2067-01-31 || {{convert|0.0874|AU|km mi|abbr=on|lk=off}} (34.0 LD)
|-
| 2094-01-30 || {{convert|0.0747|AU|km mi|abbr=on|lk=off}} (29.1 LD)
|-
| 2122-07-04 || {{convert|0.0743|AU|km mi|abbr=on|lk=off}} (28.9 LD)
|-
| 2149-07-06 || {{convert|0.0518|AU|km mi|abbr=on|lk=off}} (20.2 LD)
|-
| 2175-02-02 || {{convert|0.0802|AU|km mi|abbr=on|lk=off}} (31.2 LD)
|}

== Notes ==
{{Reflist|group="note"}}

== References ==
{{reflist|refs=

<ref name=jpldata>{{cite web
  |type=2013-03-12 last obs and [[observation arc]]=10.8 years
  |title=JPL Small-Body Database Browser: 177049 (2003 EE16)
  |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003EE16
  |publisher=[[Jet Propulsion Laboratory]]
  |accessdate=7 April 2016}}</ref>

<ref name="MPEC2003-E34">{{cite web
  |title=MPEC 2003-E34 : 2003 EE16
  |publisher=[[IAU Minor Planet Center]]
  |date=2003-03-09
  |url=https://minorplanetcenter.net/mpec/K03/K03E34.html
  |accessdate=2014-02-03}} (K03E16E)</ref>

<ref name="Wayback2003-04">{{cite web|date=2003-04-02 |url=http://neo.jpl.nasa.gov/risk/ |title=Current Impact Risks (2003 EE16) |work=Near-Earth Object Program |publisher=[[NASA]] |url-status=dead |archiveurl=https://web.archive.org/web/20030402122939/http://neo.jpl.nasa.gov/risk/ |archivedate=April 2, 2003 }}</ref>

<ref name="spaceguard">{{cite web
 |date=2003-07-15 
 |url=http://spaceguard.iasf-roma.inaf.it/SSystem/NEOCS/2003ee16.html
 |archive-url=https://web.archive.org/web/20140221232048/http://spaceguard.iasf-roma.inaf.it/SSystem/NEOCS/2003ee16.html
 |url-status=dead
 |archive-date=2014-02-21
 |title=2003 EE16 
 |publisher=Spaceguard Central Node 
 |accessdate=2014-02-03}}</ref>

<ref name="removed">{{cite web
  |title=Date/Time Removed
  |publisher=NASA/JPL Near-Earth Object Program Office
  |url=http://neo.jpl.nasa.gov/risk/removed.html
  |archive-url=https://web.archive.org/web/20020602101400/http://neo.jpl.nasa.gov/risk/removed.html
  |url-status=dead
  |archive-date=2002-06-02
  |accessdate=2014-02-03}}</ref>

<ref name=jpl-close>{{cite web
  |type=2013-03-12 last obs and [[observation arc]]=10.8 years
  |title=JPL Close-Approach Data: 177049 (2003 EE16)
  |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003EE16;cad=1#cad
  |accessdate=2014-02-03}}</ref>

<ref name="jpl-search">{{cite web
  |title=JPL Small-Body Database Search Engine: H <= 22 (mag) and Earth MOID < 0.0027 (AU)
  |publisher=JPL Solar System Dynamics
  |url=http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;combine_mode=AND;c1_group=OBJ;c1_item=Ai;c1_op=%3C%3D;c1_value=22;c2_group=ORB;c2_item=Bt;c2_op=%3C;c2_value=0.0027;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsCjCpAiBt;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=combine_mode;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=BtA
  |accessdate=2013-02-03}}</ref>

}} <!-- end of reflist -->

== External links ==
* {{NeoDys|177049}}
* {{ESA-SSA|177049|2003EE16}}
* {{JPL small body|id=177049}}

{{Minor planets navigator| |number=177049 |PageName={{mp|(177049) 2003 EE|16}} |}}
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{{DEFAULTSORT:2003 EE16}}
[[Category:Apollo asteroids|177049]]
[[Category:Discoveries by the Spacewatch project|177049]]
[[Category:Potentially hazardous asteroids|177049]]
[[Category:Near-Earth objects removed from the Sentry Risk Table|177049]]
[[Category:Near-Earth objects in 2014|20140701]]
[[Category:Astronomical objects discovered in 2003|20030308]]