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词条 (4489) 1988 AK
释义

  1. Orbit and classification

  2. Physical characteristics

      Rotation period    Diameter and albedo  

  3. Numbering and naming

  4. Notes

  5. References

  6. External links

{{Infobox planet
| minorplanet = yes
| name = (4489) 1988 AK
| background = #C2FFFF
| image =
| image_size =
| caption =
| discovery_ref =  [1]
| discoverer = E. Bowell
| discovery_site = Lowell Obs.
| discovered = 15 January 1988
| mpc_name = (4489) 1988 AK
| alt_names = 1988 AK{{·}}{{mp|1980 KA|1}}
{{mp|1989 AQ|1}}
| pronounced =
| named_after =
| mp_category = Jupiter trojan [1][5]
{{nowrap|Greek [6][7]{{·}}background [7]}}
| orbit_ref =  
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 37.94 yr (13,857 d)
| aphelion = 5.5196 AU
| perihelion = 4.9173 AU
| semimajor = 5.2184 AU
| eccentricity = 0.0577
| period = 11.92 yr (4,354 d)
| mean_anomaly = 174.79°
| mean_motion = {{Deg2DMS|0.0827|sup=ms}} / day
| inclination = 22.224°
| asc_node = 86.540°
| arg_peri = 6.5830°
| jupiter_moid = 0.1975 AU
| tisserand = 2.8480
| mean_diameter = {{val|76.60|0.41|u=km}}[10]
{{val|92.93|7.4|u=km}}[11]
{{val|95.02|2.47|u=km}}[12]
| rotation = {{val|12.580|0.001|ul=h}}[13]{{efn|name=lightcurve-plots-CS3}}
{{val|12.58|0.1|u=h}}[14]
{{val|12.582|0.001|u=h}}[15]{{efn|name=lightcurve-plots-CS3}}
{{val|12.582|0.004|u=h}}[16]
| albedo = {{val|0.050|0.003}}[12]
{{val|0.0514|0.009}}[11]
{{val|0.069|0.005}}[10]
| spectral_type = D {{small|(SDSS-MOC)}}[20]
D {{small|(S3OS2)}}[21]
D {{small|(Pan-STARRS)}}[5][23]
V–I = {{val|0.950|0.037}}[5]
| abs_magnitude = 9.00[1][5][12]
9.1[10]
{{val|9.12|0.22}}[23]
}}{{mp|(4489) 1988 AK}}, provisional designation {{mp|1988 AK}}, is a large Jupiter trojan from the Greek camp, approximately {{convert|90|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 15 January 1988, by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Observatory near Flagstaff, Arizona, in the United States.[1] The dark D-type asteroid belongs to the 50 largest Jupiter trojans and has a rotation period of 12.58 hours.[5] It has not yet been named since its numbering in June 1990.[33]

Orbit and classification

{{mp|1988 AK}} is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's {{L4}} Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is a non-family asteroid in the Jovian background population.[7][35] It orbits the Sun at a distance of 4.9–5.5 AU once every 11 years and 11 months (4,354 days; semi-major axis of 5.22 AU). Its orbit has an eccentricity of 0.06 and an inclination of 22° with respect to the ecliptic.

The body's observation arc begins with its first observation as {{mp|1980 KA|1}} at Crimea–Nauchnij in May 1980, almost 8 years prior to its official discovery observation at Anderson Mesa.[1]

Physical characteristics

In the SDSS-based taxonomy, as well as in both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), {{mp|1988 AK}} is a dark D-type asteroid.[20][35][21] It has also been characterized as a D-type by Pan-STARRS' survey.[5][23]

On 18 December 2012, {{mp|1988 AK}} has occulted the star TYC 2467-00054-1 over parts of the United States. The asteroid's brightness was measured at 16.1 and that of the star at 11.1 magnitude.[43]

Rotation period

Since 1992, several rotational lightcurves of {{mp|1988 AK}} have been obtained from photometric observations by Stefano Mottola, as well as Daniel Coley and Robert Stephens at the Center for Solar System Studies, California, in collaboration with Linda French and Brian Warner. Lightcurve analysis gave a well-defined rotation period of 12.582 hours with a consolidated brightness amplitude between 0.20 and 0.26 magnitude ({{small|U=3/3}}).[5][13][14][15][16]{{efn|name=lightcurve-plots-CS3}}

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, {{mp|1988 AK}} measures between 76.60 and 95.02 kilometers in diameter and its surface has an albedo between 0.050 and 0.069.[10][11][12]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0514 and a diameter of 92.93 kilometers based on an absolute magnitude of 9.0.[5]

{{Largest Jupiter trojans}}

Numbering and naming

This minor planet was numbered on 8 June 1990 ({{small|M.P.C. 16414}}).[33] As of 2018, it has not been named.[1] Up to number 5000, nearly all minor planets have received a name with only a small group of Jupiter trojans and near-Earth asteroids remaining unnamed:

{{Div col|colwidth=16em}}
  • {{mpl|(3708) 1974 FV|1}}
  • {{mpl|(4035) 1986 WD}}
  • {{mp|(4489) 1988 AK}}
  • {{mpl|(4596) 1981 QB}}
  • {{mpl|(4688) 1980 WF}}
  • {{mpl|(4715) 1989 TS1}}
  • {{mpl|(4835) 1989 BQ}}
  • {{mpl|(4953) 1990 MU}}
{{Div col end}}

Notes

{{notelist|refs={{efn|name=lightcurve-plots-CS3|1=Lightcurve plots of (4489) 1988 AK from March 2015 and April 2016 by Daniel Coley and Robert Stephens at the Center for Solar System Studies {{Obscode|U81}}/{{Obscode|U80}}. Quality code is 3/3 (lightcurve rating at CS3). Summary figures at the LCDB and CS3.}}

}}

References

1. ^1 2 3 4 5 6 7 {{cite web |title = 4489 (1988 AK) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=4489 |accessdate = 7 June 2018}}
2. ^1 {{cite web |title = List of Jupiter Trojans |work = Minor Planet Center |date = 30 May 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 7 June 2018}}
3. ^1 2 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 7 June 2018}}
4. ^1 2 3 4 {{cite journal |first1 = T. |last1 = Grav |first2 = A. K. |last2 = Mainzer |first3 = J. M. |last3 = Bauer |first4 = J. R. |last4 = Masiero |first5 = C. R. |last5 = Nugent |date = November 2012 |title = WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy |url = https://arxiv.org/pdf/1209.1549.pdf |journal = The Astrophysical Journal |volume = 759 |issue = 1 |page = 10 |bibcode = 2012ApJ...759...49G |doi = 10.1088/0004-637X/759/1/49 |arxiv = 1209.1549 |access-date= 9 June 2018}} (online catalog)
5. ^1 2 {{cite web |title = Asteroid (4489) 1988 AK |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=4489 |accessdate = 7 June 2018}}
6. ^1 2 {{Cite journal |first1 = J. M. |last1 = Carvano |first2 = P. H. |last2 = Hasselmann |first3 = D. |last3 = Lazzaro |first4 = T. |last4 = Mothé-Diniz |date = February 2010 |title = SDSS-based taxonomic classification and orbital distribution of main belt asteroids |url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_I0035_5_SDSSTAX_V1_1/data/sdsstax_ast_table.tab |journal = Astronomy and Astrophysics |volume = 510 |page = 12 |bibcode = 2010A&A...510A..43C |doi = 10.1051/0004-6361/200913322 |access-date= 15 June 2018}}
7. ^1 2 3 {{cite journal |first1 = E. F. |last1 = Tedesco |first2 = P. V. |last2 = Noah |first3 = M. |last3 = Noah |first4 = S. D. |last4 = Price |date = October 2004 |title = IRAS Minor Planet Survey V6.0 |url = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |journal = NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |accessdate = 15 June 2018}}
8. ^1 2 {{Cite journal |first1 = D. |last1 = Lazzaro |first2 = C. A. |last2 = Angeli |first3 = J. M. |last3 = Carvano |first4 = T. |last4 = Mothé-Diniz |first5 = R. |last5 = Duffard |first6 = M. |last6 = Florczak |date = November 2004 |title = S3OS2: the visible spectroscopic survey of 820 asteroids |url = http://sirrah.troja.mff.cuni.cz/yarko-site/tmp/eos/NEW/spectral_type_figure/s3os2.pdf |journal = Icarus |volume = 172 |issue = 1 |pages = 179–220 |bibcode = 2004Icar..172..179L |doi = 10.1016/j.icarus.2004.06.006 |access-date= 7 June 2017}}
9. ^1 2 3 {{cite web |title = Asteroid (4489) 1988 AK |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=4489&pc=1.1.6 |accessdate = 7 June 2018}}
10. ^1 2 3 4 5 6 7 8 {{cite web |title = LCDB Data for (4489) |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=4489%7C |accessdate = 7 June 2018}}
11. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Fumihiko |last1 = Usui |first2 = Daisuke |last2 = Kuroda |first3 = Thomas G. |last3 = Müller |first4 = Sunao |last4 = Hasegawa |first5 = Masateru |last5 = Ishiguro |first6 = Takafumi |last6 = Ootsubo |first7 = Daisuke |last7 = Ishihara |first8 = Hirokazu |last8 = Kataza |first9 = Satoshi |last9 = Takita |first10 = Shinki |last10 = Oyabu |first11 = Munetaka |last11 = Ueno |first12 = Hideo |last12 = Matsuhara |first13 = Takashi |last13 = Onaka |date = October 2011 |title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey |url = http://pasj.oxfordjournals.org/content/63/5/1117.full.pdf+html |journal = Publications of the Astronomical Society of Japan |volume = 63 |issue = 5 |pages = 1117–1138 |bibcode = 2011PASJ...63.1117U |doi = 10.1093/pasj/63.5.1117 |access-date= 15 June 2018}} (online, [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])
12. ^1 2 {{Cite journal |first1 = Linda M. |last1 = French |first2 = Robert D. |last2 = Stephens |first3 = Susan M. |last3 = Lederer |first4 = Daniel R. |last4 = Coley |first5 = Derrick A. |last5 = Rohl |date = April 2011 |title = Preliminary Results from a Study of Trojan Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38..116F |journal = The Minor Planet Bulletin |volume = 38 |issue = 2 |pages = 116–120 |issn = 1052-8091 |bibcode = 2011MPBu...38..116F |access-date= 7 June 2018}}
13. ^1 2 {{cite journal |display-authors = 6 |first1 = Stefano |last1 = Mottola |first2 = Mario |last2 = Di Martino |first3 = Anders |last3 = Erikson |first4 = Maria |last4 = Gonano-Beurer |first5 = Albino |last5 = Carbognani |first6 = Uri |last6 = Carsenty |first7 = Gerhard |last7 = Hahn |first8 = Hans-Josef |last8 = Schober |first9 = Felix |last9 = Lahulla |first10 = Marco |last10 = Delbò |first11 = Claes-Ingvar |last11 = Lagerkvist |date = May 2011 |title = Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects |url = http://iopscience.iop.org/article/10.1088/0004-6256/141/5/170/pdf |journal = The Astronomical Journal |volume = 141 |issue = 5 |page = 32 |bibcode = 2011AJ....141..170M |doi = 10.1088/0004-6256/141/5/170 |access-date= 7 June 2018}}
14. ^1 2 {{Cite journal |first1 = Robert D. |last1 = Stephens |first2 = Daniel R. |last2 = Coley |first3 = Brian D. |last3 = Warner |first4 = Linda, M. |last4 = French |date = October 2016 |title = Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..323S |journal = The Minor Planet Bulletin |volume = 43 |issue = 4 |pages = 323–331 |issn = 1052-8091 |bibcode = 2016MPBu...43..323S |access-date= 7 June 2018}}
15. ^1 2 {{Cite journal |first1 = Robert D. |last1 = Stephens |first2 = Daniel, R. |last2 = Coley |first3 = Linda M. |last3 = French |date = January 2016 |title = Large L5 Jovian Trojan Asteroid Lightcurves from the Center for Solar System Studies |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43...15S |journal = The Minor Planet Bulletin |volume = 43 |issue = 1 |pages = 15–22 |issn = 1052-8091 |bibcode = 2016MPBu...43...15S |access-date= 7 June 2018}}
16. ^1 2 3 {{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 = https://arxiv.org/pdf/1506.00762.pdf |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 |access-date= 7 June 2018}}
17. ^1 Asteroid Occultation Updates {{webarchive|url=https://web.archive.org/web/20120711130630/http://www.asteroidoccultation.com/2012_12/1218_4489_27150.htm |date=2012-07-11 }}
[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]

}}

External links

  • Asteroid Lightcurve Database (LCDB), query form (info)
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • {{AstDys|4489}}
  • {{JPL small body}}
{{Use dmy dates|date=June 2018}}{{Minor planets navigator |4488 Tokitada |number=4489 |4490 Bambery}}{{Small Solar System bodies}}{{DEFAULTSORT:1988 AK}}

3 : Jupiter trojans (Greek camp)|Discoveries by Edward L. G. Bowell|Astronomical objects discovered in 1988
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