请输入您要查询的百科知识：

　

词条 (5646) 1990 TR
释义

  1. Orbit

  2. Lightcurve

  3. Diameter and albedo

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = (5646) 1990 TR
| background = #FFC2E0
| image =
| image_size =
| caption =
| discovery_ref =  
| discovered = 11 October 1990
| discoverer = S. Ueda
H. Kaneda
| discovery_site = Kushiro Obs.
| mpc_name = (5646) 1990 TR
| alt_names = 1990 TR
| pronounced =
| named_after =
| mp_category = Amor{{·}}NEO [3]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 26.90 yr (9,825 days)
| aphelion = 3.0791 AU
| perihelion = 1.2087 AU
| semimajor = 2.1439 AU
| eccentricity = 0.4362
| period = 3.14 yr (1,147 days)
| mean_anomaly = 218.56°
| mean_motion = {{Deg2DMS|0.3140|sup=ms}} / day
| inclination = 7.9118°
| asc_node = 14.141°
| arg_peri = 335.68°
| moid = 0.2112 AU{{·}} 82.3 LD
| satellites = 1 [5][6]
| dimensions = {{val|2.03|0.52}} km[7]
2.30 km {{small|(derived)}}[8]
{{val|2.50|0.05}} km[9]
{{val|2.723|0.525}} km[10]
4.3 km {{small|(dated)}}
| rotation = {{val|3.1999|0.0002}} h[5]
{{val|3.204|0.002}} h[13]
{{val|6.25}} h[14]
| albedo = 0.18 {{small|(assumed)}}[8]
{{val|0.19|0.03}}[9]
{{val|0.454|0.194}}[10][18]
{{val|0.65|0.43}}[7]
{{val|0.66|0.42}}[20]
| spectral_type = SMASS = U 
Q [22]{{·}}S [23]{{·}}U [8]
| abs_magnitude = 14.3[10]{{·}}15.00[23]{{·}}15.4{{·}}15.45[9]{{·}}15.67[8][14]
}}{{mp|(5646) 1990 TR}} is a probable rare-type binary[6] asteroid classified as near-Earth object of the Amor group, approximately 2.3 kilometers in diameter. It was discovered on 11 October 1990, by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at Kushiro Observatory near Kushiro, in eastern Hokkaido, Japan.[3]

Orbit

The asteroid orbits the Sun at a distance of 1.2–3.1 AU once every 3 years and 2 months (1,147 days). Its orbit has an eccentricity of 0.44 and an inclination of 8° with respect to the ecliptic. The body's observation arc begins with its first observation at the Siding Spring Observatory, five months prior to its official discovery observation at Kushiro.[3]

Lightcurve

In December 2012, the so far best rated rotational lightcurve was obtained by American astronomer Brian Warner at his Palmer Divide Observatory in Colorado. Lightcurve analysis gave a rotation period of 3.1999 hours with a brightness variation of 0.12 magnitude ({{small|U=3}}). Photometric observations also gave a period of 19.47 hours for a probable asteroid moon, with a measured diameter-ratio of {{val|0.18|0.02}}, which translates into a diameter of 400 meters for its moon.[5]

Diameter and albedo

According to the surveys carried out by the Spitzer Space Telescope and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 2.03 and 2.723 kilometers in diameter and its surface has an albedo of 0.19 and 0.66.[7][9][10][18] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.18 and derives a diameter of 2.3 kilometers based on an absolute magnitude of 15.67.[8]

References

1. ^1 2 3 {{cite web |title = 5646 (1990 TR) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=5646 |accessdate = 12 February 2017}}
2. ^1 2 {{cite web |date = 2013-11-18 |title = Binary and Ternary near-Earth Asteroids detected by radar |publisher = NASA/JPL Asteroid Radar Research |author = Dr. Lance A. M. Benner |url = http://echo.jpl.nasa.gov/~lance/binary.neas.html |accessdate = 2014-03-01}}
3. ^1 2 {{Cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Bauer |first4 = J. |last4 = Masiero |first5 = R. S. |last5 = McMillan |first6 = R. M. |last6 = Cutri |first7 = R. |last7 = Walker |first8 = E. |last8 = Wright |first9 = P. |last9 = Eisenhardt |first10 = D. J. |last10 = Tholen |first11 = T. |last11 = Spahr |first12 = R. |last12 = Jedicke |first13 = L. |last13 = Denneau |first14 = E. |last14 = DeBaun |first15 = D. |last15 = Elsbury |first16 = T. |last16 = Gautier |first17 = S. |last17 = Gomillion |first18 = E. |last18 = Hand |first19 = W. |last19 = Mo |first20 = J. |last20 = Watkins |first21 = A. |last21 = Wilkins |first22 = G. L. |last22 = Bryngelson |first23 = A. |last23 = Del Pino Molina |first24 = S. |last24 = Desai |first25 = M. |last25 = Gómez Camus |first26 = S. L. |last26 = Hidalgo |first27 = I. |last27 = Konstantopoulos |first28 = J. A. |last28 = Larsen |first29 = C. |last29 = Maleszewski |first30 = M. A. |last30 = Malkan |first31 = J.-C. |last31 = Mauduit |first32 = B. L. |last32 = Mullan |first33 = E. W. |last33 = Olszewski |first34 = J. |last34 = Pforr |first35 = A. |last35 = Saro |first36 = J. V. |last36 = Scotti |first37 = L. H. |last37 = Wasserman |date = December 2011 |title = NEOWISE Observations of Near-Earth Objects: Preliminary Results |journal = The Astrophysical Journal |volume = 743 |issue = 2 |page = 17 |bibcode = 2011ApJ...743..156M |doi = 10.1088/0004-637X/743/2/156 |arxiv = 1109.6400 }}
4. ^1 2 3 4 5 {{cite web |title = LCDB Data for (5646) |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=5646%7C |accessdate = 12 February 2017}}
5. ^1 2 3 {{Cite journal |display-authors = 6 |first1 = Michael |last1 = Mueller |first2 = M. |last2 = Delbo' |first3 = J. L. |last3 = Hora |first4 = D. E. |last4 = Trilling |first5 = B. |last5 = Bhattacharya |first6 = W. F. |last6 = Bottke |first7 = S. |last7 = Chesley |first8 = J. P. |last8 = Emery |first9 = G. |last9 = Fazio |first10 = A. W. |last10 = Harris |first11 = A. |last11 = Mainzer |first12 = M. |last12 = Mommert |first13 = B. |last13 = Penprase |first14 = H. A. |last14 = Smith |first15 = T. B. |last15 = Spahr |first16 = J. A. |last16 = Stansberry |first17 = C. A. |last17 = Thomas |date = April 2011 |title = ExploreNEOs. III. Physical Characterization of 65 Potential Spacecraft Target Asteroids |journal = The Astronomical Journal |volume = 141 |issue = 4 |page = 9 |bibcode = 2011AJ....141..109M |doi = 10.1088/0004-6256/141/4/109 }}
6. ^1 {{Cite journal |display-authors = 6 |first1 = C. A. |last1 = Thomas |first2 = D. E. |last2 = Trilling |first3 = J. P. |last3 = Emery |first4 = M. |last4 = Mueller |first5 = J. L. |last5 = Hora |first6 = L. A. M. |last6 = Benner |first7 = B. |last7 = Bhattacharya |first8 = W. F. |last8 = Bottke |first9 = S. |last9 = Chesley |first10 = M. |last10 = Delbó |first11 = G. |last11 = Fazio |first12 = A. W. |last12 = Harris |first13 = A. |last13 = Mainzer |first14 = M. |last14 = Mommert |first15 = A. |last15 = Morbidelli |first16 = B. |last16 = Penprase |first17 = H. A. |last17 = Smith |first18 = T. B. |last18 = Spahr |first19 = J. A. |last19 = Stansberry |date = September 2011 |title = ExploreNEOs. V. Average Albedo by Taxonomic Complex in the Near-Earth Asteroid Population |journal = The Astronomical Journal |volume = 142 |issue = 3 |page = 12 |bibcode = 2011AJ....142...85T |doi = 10.1088/0004-6256/142/3/85 }}
7. ^1 {{Cite journal |first1 = Cristina A. |last1 = Thomas |first2 = Joshua P. |last2 = Emery |first3 = David E. |last3 = Trilling |first4 = Marco |last4 = Delbó |first5 = Joseph L. |last5 = Hora |first6 = Michael |last6 = Mueller |date = January 2014 |title = Physical characterization of Warm Spitzer-observed near-Earth objects |journal = Icarus |volume = 228 |pages = 217–246 |bibcode = 2014Icar..228..217T |doi = 10.1016/j.icarus.2013.10.004 |arxiv = 1310.2000 }}
8. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = E. |last4 = Hand |first5 = J. |last5 = Bauer |first6 = D. |last6 = Tholen |first7 = R. S. |last7 = McMillan |first8 = T. |last8 = Spahr |first9 = R. M. |last9 = Cutri |first10 = E. |last10 = Wright |first11 = J. |last11 = Watkins |first12 = W. |last12 = Mo |first13 = C. |last13 = Maleszewski |date = November 2011 |title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 25 |bibcode = 2011ApJ...741...90M |doi = 10.1088/0004-637X/741/2/90 |arxiv = 1109.6407 }}
9. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = C. R. |last1 = Nugent |first2 = A. |last2 = Mainzer |first3 = J. |last3 = Bauer |first4 = R. M. |last4 = Cutri |first5 = E. A. |last5 = Kramer |first6 = T. |last6 = Grav |first7 = J. |last7 = Masiero |first8 = S. |last8 = Sonnett |first9 = E. L. |last9 = Wright |date = September 2016 |title = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos |journal = The Astronomical Journal |volume = 152 |issue = 3 |page = 12 |bibcode = 2016AJ....152...63N |doi = 10.3847/0004-6256/152/3/63 |arxiv = 1606.08923 }}
10. ^1 2 {{Cite journal |author = Wisniewski, Wieslaw Z. |date = December 1992 |title = The unusual lightcurve of 1990 TR |journal = In Lunar and Planetary Inst. |pages = 653 |bibcode = 1992acm..proc..653W }}
11. ^1 2 3 {{Cite journal |author = Warner, Brian D. |date = April 2013 |title = Seeing Double Old and New: Observations and Lightcurve Analysis at the Palmer Divide Observatory of Six Binary Asteroids |journal = The Minor Planet Bulletin |volume = 40 |issue = 2 |pages = 94–98 |issn = 1052-8091 |bibcode = 2013MPBu...40...94W }}
12. ^1 {{Cite journal |author = Warner, Brian D. |date = April 2016 |title = Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 October-December |journal = The Minor Planet Bulletin |volume = 43 |issue = 2 |pages = 143–154 |issn = 1052-8091 |bibcode = 2016MPBu...43..143W }}
13. ^1 2 {{Cite journal |first1 = B. |last1 = Carry |first2 = E. |last2 = Solano |first3 = S. |last3 = Eggl |first4 = F. E. |last4 = DeMeo |date = April 2016 |title = Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry |journal = Icarus |volume = 268 |pages = 340–354 |bibcode = 2016Icar..268..340C |doi = 10.1016/j.icarus.2015.12.047 |arxiv = 1601.02087 }}
[1][2][3][4][5][6][7][8][9][10][11][12][13]

}}

External links

  • Lightcurve plot of (5646) 1990 TR, Palmer Divide Observatory, B. D. Warner (2012)
  • Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
  • Asteroid Lightcurve Database (LCDB), query form (info)
  • [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
  • Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
  • Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
  • {{JPL small body}}
{{Minor planets navigator|(5645) 1990 SP|number=5646|(5647) 1990 TZ}}{{Small Solar System bodies}}{{DEFAULTSORT:1990 TR}}

6 : Amor asteroids|Discoveries by Hiroshi Kaneda|Discoveries by Seiji Ueda|Binary asteroids|Unclassifiable asteroids (SMASS)|Astronomical objects discovered in 1990
随便看

　

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

　

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间：2024/11/15 20:14:53