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| image =
| image =
| caption =
| caption =
| discovery_ref =  <ref name="jpldata" />
| discovery_ref = &thinsp;<ref name="jpldata" />
| discovered = 15 December 1992
| discovered = 15 December 1992
| discoverer = [[Satoru Otomo|S. Otomo]]
| discoverer = [[Satoru Otomo|S. Otomo]]
| discovery_site = [[Kiyosato Observatory]]
| discovery_site = [[Kiyosato Observatory|Kiyosato Obs.]]
| mp_name = 8187 Akiramisawa
| mp_name = 8187 Akiramisawa
| alt_names = 1992 XL{{·}}{{mp|1971 UF|4}}<br />1971 VV
| alt_names = 1992 XL{{·}}{{mp|1971 UF|4}}<br />1971 VV
| named_after = [[Akira Misawa]]<br />{{small|(botanist)}}<ref name="springer" />
| named_after = [[Akira Misawa]]<br />{{small|(Japanese [[botanist]])}}<ref name="springer" />
| mp_category = [[main-belt]]{{·}}{{small|(outer)}} <ref name="lcdb" />
| mp_category = [[main-belt]]{{·}}{{small|(outer)}}&thinsp;<ref name="lcdb" />
| orbit_ref =  <ref name="jpldata" />
| orbit_ref = &thinsp;<ref name="jpldata" />
| epoch = 13 January 2016 ([[Julian day|JD]] 2457400.5)
| epoch = 31 July 2016 ([[Julian day|JD]] 2457600.5)
| uncertainty = 0
| uncertainty = 0
| observation_arc = 16217 days (44.40 yr)
| observation_arc = {{nowrap|44.49 yr (16,250 days)}}
| aphelion = {{Convert|3.3501|AU|Gm|abbr=on|lk=on}}
| aphelion = 3.3505 [[Astronomical unit|AU]]
| perihelion = {{Convert|2.6220|AU|Gm|abbr=on}}
| perihelion = 2.6217 AU
| semimajor = {{Convert|2.9861|AU|Gm|abbr=on}}
| semimajor = 2.9861 AU
| eccentricity = 0.12193
| eccentricity = 0.122
| period = 5.16 [[Julian year (astronomy)|yr]] (1884.7 [[Julian year (astronomy)|d]])
| period = 5.16 [[Julian year (astronomy)|yr]] (1,885 days)
| mean_anomaly = 237.18[[Degree (angle)|°]]
| mean_anomaly = 275.4196[[Degree (angle)|°]]
| inclination = 11.609°
| mean_motion = {{Deg2DMS|0.191|sup=ms}} / day
| asc_node = 83.071°
| inclination = 11.6091°
| arg_peri = 277.71°
| asc_node = 83.0707°
⚫
| arg_peri = 277.6848°
| dimensions = 11.86 km {{small|(calculated)}}<ref name="lcdb" />
| dimensions = 11.86 km {{small|(calculated)}}<ref name="lcdb" />
| rotation = {{Convert|5.8153|h|d|abbr=on|lk=on}}<ref name="Waszczak-2015" />
| rotation = {{val|5.8153|0.0015}} [[Hour|h]]<ref name="Waszczak-2016" />
| albedo = 0.057 {{small|(assumed)}}<ref name="lcdb" />
| albedo = 0.057 {{small|(assumed)}}<ref name="lcdb" />
| spectral_type = [[C-type asteroid|C]] <ref name="lcdb" />
| spectral_type = [[C-type asteroid|C]]&thinsp;<ref name="lcdb" />
| abs_magnitude = 12.8<ref name="jpldata" />
| abs_magnitude = 12.8<ref name="jpldata" /><br />{{val|13.45|0.27}}<ref name="Veres-2015" /><br />{{val|12.908|0.007}} {{small|(R)}}<ref name="Waszczak-2016" /><br />13.36<ref name="lcdb" />
| mean_motion = {{Deg2DMS|0.19101|sup=ms}} / day
| moid = {{Convert|1.64968|AU|Gm|abbr=on}}
| jupiter_moid = {{Convert|2.1748|AU|Gm|abbr=on}}
⚫
| tisserand = 3.216
}}
}}


'''8187 Akiramisawa''', provisional designation 1992 XL, is a carbonaceous [[asteroid]] from the outer region of the [[asteroid belt]], about 12 kilometers in diameter. It was discovered by Japanese astronomer [[Satoru Otomo]] at Kiyosato Observatory on 15 December 1992.<ref name="MPC-Akiramisawa" />
'''8187 Akiramisawa''', provisional designation 1992 XL, is a carbonaceous [[asteroid]] from the outer region of the [[asteroid belt]], approximately 12 kilometers in diameter. It was discovered by Japanese astronomer [[Satoru Otomo]] at Kiyosato Observatory ({{small|[[IAU code#800–899|894]]}}) on 15 December 1992.<ref name="MPC-Akiramisawa" />


The [[C-type asteroid|C-type]] asteroid orbits the Sun at a distance of 2.6–3.4&nbsp;[[Astronomical unit|AU]] once every 5 years and 2 months (1,885 days). Its orbit is [[orbital inclination|tilted]] by 12 degrees to the plane of the [[ecliptic]] and shows an [[orbital eccentricity|eccentricity]] of 0.12. Photometric [[light-curve]] observations at the [[Palomar Transient Factory]] in 2013 rendered a [[rotation period]] of 5.8 hours<ref name="Waszczak-2015" /> and the Collaborative Asteroid Lightcurve Link (CALL) assumes a [[astronomical albedo|albedo]] of 0-06, which is a typical value for carbonaceous asteroids.<ref name="jpldata" />
The [[C-type asteroid|C-type]] asteroid orbits the Sun at a distance of 2.6–3.4&nbsp;[[Astronomical unit|AU]] once every 5 years and 2 months (1,885 days). Its orbit is [[orbital inclination|tilted]] by 12[[Degree (angle)|°]] to the plane of the [[ecliptic]] and shows an [[orbital eccentricity|eccentricity]] of 0.12.<ref name="jpldata" /> The first [[precovery]] was taken at [[Cerro El Roble Station]] in 1971, extending the asteroid's [[observation arc]] by 21 years prior to its discovery.<ref name="MPC-Akiramisawa" />


A rotational [[light-curve]] of this asteroid was obtained from photometric observations made at the U.S. [[Palomar Transient Factory]] in June 2010. The light-curve gave a [[rotation period]] of {{val|5.8153|0.0015}} hours with a brightness amplitude of 0.90 in [[Magnitude (astronomy)|magnitude]] ({{small|1=[[LCDB quality code|U=2]]}}).<ref name="Waszczak-2016" /> The ''Collaborative Asteroid Lightcurve Link'' assumes a standard [[astronomical albedo|albedo]] for carbonaceous asteroids of 0.057, and calculates a diameter of 11.9 kilometers, based on an absolute magnitude of 13.36.<ref name="jpldata" />
⚫
The minor planet was named in honour of Japanese botanist Akira Misawa (1942–1994), a professor at [[Chiba University]] and a researcher on light pollution on plants.<ref name="springer" />


⚫
The minor planet was named in honour of Japanese botanist Akira Misawa (1942–1994), a professor at [[Chiba University]] , who examined the effects of [[light pollution]] on plants.<ref name="springer" /> Naming citation was published on 9 January 2001 ({{small|[[Minor Planet Circulars|M.P.C.]] 41935}}).<ref name="MPC-Circulars-Archive" />
== References ==
== References ==
{{reflist
{{reflist
|refs=
|refs=

⚫
<ref name="lcdb">{{cite web
|title=LCDB Data for (8187) Akiramisawa
⚫
|publisher=Asteroid Lightcurve Database (LCDB)
⚫
|url=http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=8187%7CAkiramisawa
⚫
|accessdate=December 2015}}</ref>


<ref name="jpldata">{{cite web
<ref name="jpldata">{{cite web
|type=2015-07-13 last obs.
|type = 2016-04-18 last obs.
|title=JPL Small-Body Database Browser: 8187 Akiramisawa (1992 XL)
|title = JPL Small-Body Database Browser: 8187 Akiramisawa (1992 XL)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2008187
|url = http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2008187
|publisher=Jet Propulsion Laboratory
|publisher = Jet Propulsion Laboratory
|accessdate=13 April 2016}}</ref>
|accessdate = May 2016}}</ref>


<ref name="springer">{{cite book
<ref name="springer">{{cite book
⚫
|title = Dictionary of Minor Planet Names – (8187) Akiramisawa
|url=http://books.google.se/books?id=aeAg1X7afOoC&pg=PA623
⚫
|last = Schmadel | first = Lutz D.
⚫
|title=Dictionary of Minor Planet Names – (8187) Akiramisawa
⚫
|publisher = Springer Berlin Heidelberg
⚫
|last=Schmadel |first=Lutz D.
⚫
|page = 637
⚫
|publisher=Springer Berlin Heidelberg
|date = 2007
⚫
|page=623
|url = http://link.springer.com/referenceworkentry/10.1007/978-3-540-29925-7_6888
|date=2003
|isbn=978-3-540-29925-7
|isbn = 978-3-540-00238-3
|accessdate=December 2015}}</ref>
|accessdate = May 2016}}</ref>


<ref name="MPC-Akiramisawa">{{cite web
<ref name="MPC-Akiramisawa">{{cite web
|title=8187 Akiramisawa (1992 XL)
|title = 8187 Akiramisawa (1992 XL)
|work=Minor Planet Center
|work = Minor Planet Center
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=8187
|url = http://www.minorplanetcenter.net/db_search/show_object?object_id=8187
|accessdate=December 2015}}</ref>
|accessdate = May 2016}}</ref>


<ref name="Waszczak-2015">{{cite journal
<ref name="MPC-Circulars-Archive">{{cite web
|display-authors = 6
|title = MPC/MPO/MPS Archive
|author = Waszczak, Adam
|work = Minor Planet Center
|url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|author2 = Chang, Chan-Kao
⚫
|accessdate = May 2016}}</ref>
|author3 = Ofek, Eran O.

|author4 = Laher, Russ
⚫
<ref name="lcdb">{{cite web
|author5 = Masci, Frank
|author6 = Levitan, David
|title = LCDB Data for (8187) Akiramisawa
⚫
|publisher = Asteroid Lightcurve Database (LCDB)
|author7 = Surace, Jason
⚫
|url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=8187%7CAkiramisawa
|author8 = Cheng, Yu-Chi
|author9 = Ip, Wing-Huen
|accessdate = May 2016}}</ref>

|author10 = Kinoshita, Daisuke
<ref name="Waszczak-2016">{{cite journal
|author11 = Helou, George
|display-authors = 6
|author12 = Prince, Thomas A.
|author13 = Kulkarni, Shrinivas
|first1 = Adam |last1 = Waszczak
|first2 = Chan-Kao |last2 = Chang
|first3 = Eran O. |last3 = Ofek
|first4 = Russ |last4 = Laher
|first5 = Frank |last5 = Masci
|first6 = David |last6 = Levitan
|first7 = Jason |last7 = Surace
|first8 = Yu-Chi |last8 = Cheng
|first9 = Wing-Huen |last9 = Ip
|first10 = Daisuke |last10 = Kinoshita
|first11 = George |last11 = Helou
|first12 = Thomas A. |last12 = Prince
|first13 = Shrinivas |last13 = Kulkarni
|date = September 2015
|date = September 2015
|title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry
|title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry
Line 100: Line 104:
|bibcode = 2015AJ....150...75W
|bibcode = 2015AJ....150...75W
|doi = 10.1088/0004-6256/150/3/75
|doi = 10.1088/0004-6256/150/3/75
|access-date= December 2015|arxiv = 1504.04041 }}</ref>
|arxiv = 1504.04041
|access-date= May 2016}}</ref>

<ref name="Veres-2015">{{cite journal
|display-authors = 6
|first1 = Peter |last1 = Veres
|first2 = Robert |last2 = Jedicke
|first3 = Alan |last3 = Fitzsimmons
|first4 = Larry |last4 = Denneau
|first5 = Mikael |last5 = Granvik
|first6 = Bryce |last6 = Bolin
|first7 = Serge |last7 = Chastel
|first8 = Richard J. |last8 = Wainscoat
|first9 = William S. |last9 = Burgett
|first10 = Kenneth C. |last10 = Chambers
|first11 = Heather |last11 = Flewelling
|first12 = Nick |last12 = Kaiser
|first13 = Eugen A. |last13 = Magnier
|first14 = Jeff S. |last14 = Morgan
|first15 = Paul A. |last15 = Price
|first16 = John L. |last16 = Tonry
|first17 = Christopher |last17 = Waters
|date = November 2015
|title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V
|journal = Icarus
|volume = 261
|pages = 34–47
|bibcode = 2015Icar..261...34V
|doi = 10.1016/j.icarus.2015.08.007
|arxiv = 1506.00762
|access-date= May 2016}}</ref>


}} <!-- end of reflist -->
}} <!-- end of reflist -->
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* [https://books.google.se/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
* [https://books.google.se/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
* [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
* [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
* [http://www.minorplanetcenter.net/iau/lists/NumberedMPs005001.html Discovery Circumstances: Numbered Minor Planets (5001)-(10000)] – Minor Planet Center
* [http://www.minorplanetcenter.net/iau/lists/NumberedMPs005001.html Discovery Circumstances: Numbered Minor Planets (5001)-(10000)] – Minor Planet Center
* {{JPL small body|title=8187 Akiramisawa (1992 XL)|id=2008187}}
* {{JPL small body|title=8187 Akiramisawa (1992 XL)|id=2008187}}


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[[Category:Main-belt asteroids|008187]]
[[Category:Main-belt asteroids|008187]]
[[Category:Numbered minor planets|008187]]
[[Category:Numbered minor planets|008187]]
[[Category:Discoveries by Satoru Otomo|Akiramisawa]]
[[Category:Discoveries by Satoru Otomo]]
[[Category:Asteroids named for people]]
[[Category:Astronomical objects discovered in 1992|19921215]]
[[Category:Astronomical objects discovered in 1992|19921215]]


Revision as of 08:31, 4 May 2016

8187 Akiramisawa
Discovery [1]
Discovered byS. Otomo
Discovery siteKiyosato Obs.
Discovery date15 December 1992
Designations
8187 Akiramisawa
Named after
Akira Misawa
(Japanese botanist)[2]
1992 XL · 1971 UF4
1971 VV
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc44.49 yr (16,250 days)
Aphelion3.3505 AU
Perihelion2.6217 AU
2.9861 AU
Eccentricity0.122
5.16 yr (1,885 days)
275.4196°
0° 11m 27.6s / day
Inclination11.6091°
83.0707°
277.6848°
Physical characteristics
Dimensions11.86 km (calculated)[3]
5.8153±0.0015 h[4]
0.057 (assumed)[3]
C [3]
12.8[1]
13.45±0.27[5]
12.908±0.007 (R)[4]
13.36[3]

8187 Akiramisawa, provisional designation 1992 XL, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered by Japanese astronomer Satoru Otomo at Kiyosato Observatory (894) on 15 December 1992.[6]

The C-type asteroid orbits the Sun at a distance of 2.6–3.4 AU once every 5 years and 2 months (1,885 days). Its orbit is tilted by 12° to the plane of the ecliptic and shows an eccentricity of 0.12.[1] The first precovery was taken at Cerro El Roble Station in 1971, extending the asteroid's observation arc by 21 years prior to its discovery.[6]

A rotational light-curve of this asteroid was obtained from photometric observations made at the U.S. Palomar Transient Factory in June 2010. The light-curve gave a rotation period of 5.8153±0.0015 hours with a brightness amplitude of 0.90 in magnitude (U=2).[4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057, and calculates a diameter of 11.9 kilometers, based on an absolute magnitude of 13.36.[1]

The minor planet was named in honour of Japanese botanist Akira Misawa (1942–1994), a professor at Chiba University , who examined the effects of light pollution on plants.[2] Naming citation was published on 9 January 2001 (M.P.C. 41935).[7]

References

  1. ^ a b c d e "JPL Small-Body Database Browser: 8187 Akiramisawa (1992 XL)" (2016-04-18 last obs.). Jet Propulsion Laboratory. Retrieved May 2016. {{cite web}}: Check date values in: |accessdate= (help)
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (8187) Akiramisawa. Springer Berlin Heidelberg. p. 637. ISBN 978-3-540-00238-3. Retrieved May 2016. {{cite book}}: Check date values in: |accessdate= (help)
  3. ^ a b c d e "LCDB Data for (8187) Akiramisawa". Asteroid Lightcurve Database (LCDB). Retrieved May 2016. {{cite web}}: Check date values in: |accessdate= (help)
  4. ^ a b c 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 May 2016. {{cite journal}}: Check date values in: |access-date= (help)
  5. ^ 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 May 2016. {{cite journal}}: Check date values in: |access-date= (help)
  6. ^ a b "8187 Akiramisawa (1992 XL)". Minor Planet Center. Retrieved May 2016. {{cite web}}: Check date values in: |accessdate= (help)
  7. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved May 2016. {{cite web}}: Check date values in: |accessdate= (help)


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