(11474) 1982 SM2: Difference between revisions
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'''{{mp|(11474) 1982 SM|2}}''' is a carbonaceous Baptistina [[asteroid]] and potentially [[List of slow rotators (minor planets)|slow rotator]] from the inner regions of the [[asteroid belt]], approximately 6 kilometers in diameter. It was discovered on 18 September 1982, by Belgian astronomer [[Henri Debehogne]] at [[European Southern Observatory|ESO]]{{'}} [[La Silla Observatory]] in northern Chile.<ref name="MPC- |
'''{{mp|(11474) 1982 SM|2}}''' is a carbonaceous Baptistina [[asteroid]] and potentially [[List of slow rotators (minor planets)|slow rotator]] from the inner regions of the [[asteroid belt]], approximately 6 kilometers in diameter. It was discovered on 18 September 1982, by Belgian astronomer [[Henri Debehogne]] at [[European Southern Observatory|ESO]]{{'}} [[La Silla Observatory]] in northern Chile.<ref name="MPC-object" /> |
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== Orbit and classification == |
== Orbit and classification == |
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The [[C-type asteroid]] belongs to the small [[Baptistina family]]. It orbits the Sun at a distance of 1.8–2.7 [[Astronomical unit|AU]] once every 3 years and 5 months (1,254 days). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.20 and an [[orbital inclination|inclination]] of 5[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> As no [[precoveries]] were taken, and no prior identifications were made, the asteroid's [[observation arc]] begins with its official discovery observation.<ref name="MPC- |
The [[C-type asteroid]] belongs to the small [[Baptistina family]]. It orbits the Sun at a distance of 1.8–2.7 [[Astronomical unit|AU]] once every 3 years and 5 months (1,254 days). Its orbit has an [[orbital eccentricity|eccentricity]] of 0.20 and an [[orbital inclination|inclination]] of 5[[Degree (angle)|°]] with respect to the [[ecliptic]].<ref name="jpldata" /> As no [[precoveries]] were taken, and no prior identifications were made, the asteroid's [[observation arc]] begins with its official discovery observation.<ref name="MPC-object" /> |
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== Physical characteristics == |
== Physical characteristics == |
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CALL assumes a standard [[astronomical albedo|albedo]] for carbonaceous asteroids of 0.057 and calculates a diameter of 5.71 kilometers, based on an [[absolute magnitude]] of 14.49.<ref name="lcdb" /> |
CALL assumes a standard [[astronomical albedo|albedo]] for carbonaceous asteroids of 0.057 and calculates a diameter of 5.71 kilometers, based on an [[absolute magnitude]] of 14.49.<ref name="lcdb" /> |
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== Numbering and naming == |
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This [[minor planet]] was [[Minor planet designation|numbered]] by the [[Minor Planet Center]] on 28 September 1999.<ref name="MPC-Circulars-Archive" /> As of 2018, it has not been [[List of named minor planets (alphabetical)|named]].<ref name="MPC-object" /> |
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As of 2017, {{mpf|1982 SM|2}} remains unnamed.<ref name="MPC-11474" /> |
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== References == |
== References == |
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{{reflist |
{{reflist|refs= |
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|refs= |
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<ref name="jpldata">{{cite web |
<ref name="jpldata">{{cite web |
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|accessdate = 26 May 2017}}</ref> |
|accessdate = 26 May 2017}}</ref> |
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<ref name="MPC- |
<ref name="MPC-object">{{cite web |
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|title = 11474 (1982 SM2) |
|title = 11474 (1982 SM2) |
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|work = Minor Planet Center |
|work = Minor Planet Center |
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|url = http://www.minorplanetcenter.net/db_search/show_object?object_id=11474 |
|url = http://www.minorplanetcenter.net/db_search/show_object?object_id=11474 |
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|accessdate = 16 December 2016}}</ref> |
|accessdate = 16 December 2016}}</ref> |
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<ref name="MPC-Circulars-Archive">{{cite web |
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|title = MPC/MPO/MPS Archive |
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|work = Minor Planet Center |
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|url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |
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|accessdate = 24 February 2018}}</ref> |
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<ref name="lcdb">{{cite web |
<ref name="lcdb">{{cite web |
Revision as of 14:32, 24 February 2018
Discovery [1] | |
---|---|
Discovered by | H. Debehogne |
Discovery site | La Silla Obs. |
Discovery date | 18 September 1982 |
Designations | |
(11474) 1982 SM2 | |
1982 SM2 · 1995 KD | |
main-belt · Baptistina [2] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 32.59 yr (11,905 days) |
Aphelion | 2.7224 AU |
Perihelion | 1.8294 AU |
2.2759 AU | |
Eccentricity | 0.1962 |
3.43 yr (1,254 days) | |
76.029° | |
0° 17m 13.56s / day | |
Inclination | 5.4069° |
348.59° | |
355.61° | |
Physical characteristics | |
Dimensions | 5.71 km (calculated)[2] |
1917.2214±2716 h[3] | |
0.057 (assumed)[2] | |
C [2] | |
14.493±0.001 (R)[3] · 14.7[1] · 14.94[2] · 14.94±0.61[4] | |
(11474) 1982 SM2 is a carbonaceous Baptistina asteroid and potentially slow rotator from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 18 September 1982, by Belgian astronomer Henri Debehogne at ESO' La Silla Observatory in northern Chile.[5]
Orbit and classification
The C-type asteroid belongs to the small Baptistina family. It orbits the Sun at a distance of 1.8–2.7 AU once every 3 years and 5 months (1,254 days). Its orbit has an eccentricity of 0.20 and an inclination of 5° with respect to the ecliptic.[1] As no precoveries were taken, and no prior identifications were made, the asteroid's observation arc begins with its official discovery observation.[5]
Physical characteristics
In September 2013, a rotational lightcurve of this asteroid was obtained from photometric observations in the R-band at the Palomar Transient Factory in California. It gave an exceptionally long rotation period of 1917 hours with a brightness amplitude of 0.04 magnitude (U=1).[3] However, the fragmentary light-curve has received a low quality rating by the Collaborative Asteroid Lightcurve Link (CALL) which means that the result could be completely wrong (also see potentially slow rotator).[2][3]
CALL assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 5.71 kilometers, based on an absolute magnitude of 14.49.[2]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 28 September 1999.[6] As of 2018, it has not been named.[5]
References
- ^ a b c d "JPL Small-Body Database Browser: 11474 (1982 SM2)" (2015-04-23 last obs.). Jet Propulsion Laboratory. Retrieved 26 May 2017.
- ^ a b c d e f g "LCDB Data for (11474)". Asteroid Lightcurve Database (LCDB). Retrieved 16 December 2016.
- ^ a b c d Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 16 December 2016.
- ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 16 December 2016.
- ^ a b c "11474 (1982 SM2)". Minor Planet Center. Retrieved 16 December 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
- (11474) 1982 SM2 at the JPL Small-Body Database