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{{Use dmy dates|date=February 2018}}
{{Minor Planet |
{{DISPLAYTITLE:{{mp|612600|2003 SM|84}}}}
name=2003 SM84
{{Infobox planet
| discoverer=
| minorplanet = yes
| discovery_date=2003
| name = {{mp|(612600) 2003 SM|84}}
| designations=2003 SM84
| background = #FFC2E0
| category=]
| image =
| epoch=
| image_size =
| semimajor=1.125 ]
| caption =
| perihelion=1.03 AU
| discovery_ref = <ref name="MPC-object" />
| aphelion=1.21 AU
| discoverer = ]
| eccentricity=0.08
| discovery_site = ]
| period=436.11 ]
| discovered = 20 September 2003<br />{{small|(first observed only)}}
| inclination=2.79]
| mpc_name = {{mp|2003 SM|84}}
| asc_node=
| alt_names =
| arg_peri=
| pronounced =
| mean_anomaly=
| named_after =
| speed=
| mp_category = ]{{·}}]<ref name="MPC-object" /><ref name="jpldata" />
| dimensions=
| orbit_ref = <ref name="jpldata" />
| mass=
| epoch = 27 April 2019 (] 2458600.5)
| density=
| uncertainty = 1
| gravity=
| observation_arc = 12.21 ] (4,459 d)
| escape_velocity=
| aphelion = 1.2176 ]
| rotation=
| perihelion = 1.0331 AU
| spectral_class=]
| semimajor = 1.1254 AU
| abs_mag=22.74
| eccentricity = 0.0819
| albedo=
| period = 1.19 yr (436 d)
| temperature=}}
| mean_anomaly = 97.681]
'''2003 SM84''' is an as yet unnamed and unnumbered ] discovered in 2003. Its size and physical properties are uncertain. An ], it orbits between ] and ].
| mean_motion = {{Deg2DMS|0.8256|sup=ms}} / day
| inclination = 2.7956°
| asc_node = 186.68°
| arg_peri = 87.374°
| moid = 0.0516 AU<br />(20.1022 ])
| mean_diameter = {{val|86|ul=m}} {{small|(est. at ])}}<ref name="h" /><br />{{val|160|ul=m}} {{small|(est. at ])}}<ref name="h" />
| rotation =
| albedo =
| spectral_type =
| abs_magnitude = 22.7<ref name="jpldata" />
}}


'''{{mp|(612600) 2003 SM|84}}''' is a sub-kilometer ], classified as ] of the ] orbiting between ] and ]. It was first observed by the ] (LINEAR) at the ] on 20 September 2003.<ref name="MPC-object" /> As of 2020, this ] has neither been nor ].<ref name="MPC-object" />
2003 SM84 is being considered by the ] as a candidate target for the ] mission to study the effects of impacting a spacecraft into an asteroid.


{{mp|2003 SM|84}} is an ] – a subgroup of near-Earth asteroids that approach the orbit of Earth from beyond, but do not cross it. It orbits the Sun at a distance of 1.0–1.2&nbsp;] once every 14 months (436 days; ] of 1.13&nbsp;AU). Its orbit has an ] of 0.08 and an ] of 3] with respect to the ].<ref name="jpldata" /> The body's ] begins with its first observation by LINEAR in 2003.<ref name="MPC-object" />
== External links ==
*{{JPL Small Body}}
*


The object's ] remains unknown.<ref name="jpldata" /> Using a magnitude-to-diameter conversion, {{mp|2003 SM|84}} measures 86 and 160 meters in diameter, based on an ] of 22.7 and an assumed ] of 0.20 (]) and 0.057 (]), respectively.<ref name="h" /> {{mp|2003 SM|84}} was being considered by the ] as a candidate target for the '']'' mission to study the effects of impacting a spacecraft into an asteroid.<ref name="universetoday" />
{{MinorPlanets_Footer}}

== References ==
{{Reflist|refs=

<ref name="jpldata">{{cite web
|type = 2015-12-05 last obs.
|title = JPL Small-Body Database Browser: (2003 SM84)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3160738
|archive-url = https://web.archive.org/web/20200902071049/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3160738
|url-status = dead
|archive-date = 2 September 2020
|publisher = ]
|accessdate = 20 December 2019}}</ref>

<ref name="MPC-object">{{cite web
|title = 2003 SM84
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2003+SM84
|accessdate = 20 December 2019}}</ref>

<ref name="universetoday">{{cite web
|title = Astronomy Without A Telescope – Impact Mitigation
|first = Steve |last = Nerlich
|date = 13 August 2011
|website = www.universetoday
|url = https://www.universetoday.com/88145/astronomy-without-a-telescope-impact-mitigation/
|accessdate = 20 December 2019}}</ref>

<ref name="h">{{cite web
|title = Asteroid Size Estimator
|publisher = CNEOS NASA/JPL
|url = https://cneos.jpl.nasa.gov/tools/ast_size_est.html
|accessdate = 20 December 2019}}</ref>

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

== External links ==
*
* {{NeoDys|2003SM84}}
* {{JPL Small Body}}


{{Minor planets navigator | |number=612600 |PageName={{mp|(612600) 2003 SM|84}} | }}
]
{{Small Solar System bodies}}
]
{{Authority control}}


{{DEFAULTSORT:2003 SM84}}
{{NE-asteroid-stub}}
]
]
]

Latest revision as of 21:12, 4 November 2024

(612600) 2003 SM84
Discovery
Discovered byLINEAR
Discovery siteLincoln Laboratory ETS
Discovery date20 September 2003
(first observed only)
Designations
MPC designation2003 SM84
Minor planet categoryNEO · Amor
Orbital characteristics
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 1
Observation arc12.21 yr (4,459 d)
Aphelion1.2176 AU
Perihelion1.0331 AU
Semi-major axis1.1254 AU
Eccentricity0.0819
Orbital period (sidereal)1.19 yr (436 d)
Mean anomaly97.681°
Mean motion0° 49 32.16 / day
Inclination2.7956°
Longitude of ascending node186.68°
Argument of perihelion87.374°
Earth MOID0.0516 AU
(20.1022 LD)
Physical characteristics
Mean diameter86 m (est. at 0.20)
160 m (est. at 0.057)
Absolute magnitude (H)22.7

(612600) 2003 SM84 is a sub-kilometer asteroid, classified as near-Earth object of the Amor group orbiting between Earth and Mars. It was first observed by the Lincoln Near-Earth Asteroid Research (LINEAR) at the Lincoln Laboratory ETS on 20 September 2003. As of 2020, this minor planet has neither been nor named.

2003 SM84 is an Amor asteroid – a subgroup of near-Earth asteroids that approach the orbit of Earth from beyond, but do not cross it. It orbits the Sun at a distance of 1.0–1.2 AU once every 14 months (436 days; semi-major axis of 1.13 AU). Its orbit has an eccentricity of 0.08 and an inclination of 3° with respect to the ecliptic. The body's observation arc begins with its first observation by LINEAR in 2003.

The object's spectral type remains unknown. Using a magnitude-to-diameter conversion, 2003 SM84 measures 86 and 160 meters in diameter, based on an absolute magnitude of 22.7 and an assumed albedo of 0.20 (S-type) and 0.057 (C-type), respectively. 2003 SM84 was being considered by the European Space Agency as a candidate target for the Don Quijote mission to study the effects of impacting a spacecraft into an asteroid.

References

  1. ^ "2003 SM84". Minor Planet Center. Retrieved 20 December 2019.
  2. ^ "JPL Small-Body Database Browser: (2003 SM84)" (2015-12-05 last obs.). Jet Propulsion Laboratory. Archived from the original on 2 September 2020. Retrieved 20 December 2019.
  3. ^ "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 20 December 2019.
  4. Nerlich, Steve (13 August 2011). "Astronomy Without A Telescope – Impact Mitigation". www.universetoday. Retrieved 20 December 2019.

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