请输入您要查询的百科知识：

　

词条 1998 Titius
释义

  1. Orbit and classification

  2. Physical characteristics

      Diameter and albedo    Spectral type    Rotation period  

  3. Naming

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 1998 Titius
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref =  
| discovered = 24 February 1938
| discoverer = A. Bohrmann
| discovery_site = Heidelberg Obs.
| mpc_name = (1998) Titius
| alt_names = {{mp|1938 DX|1}}{{·}}1966 TF
| named_after = Johann Titius {{small|(astronomer)}}[2]
| mp_category = main-belt{{·}}{{small|(inner)}} [3]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 79.27 yr (28,955 days)
| aphelion = 2.5750 AU
| perihelion = 2.2643 AU
| semimajor = 2.4196 AU
| eccentricity = 0.0642
| period = 3.76 yr (1,375 days)
| mean_anomaly = 335.11°
| mean_motion = {{Deg2DMS|0.2619|sup=ms}} / day
| inclination = 7.6265°
| asc_node = 351.78°
| arg_peri = 246.70°
| dimensions = 10.79 km {{small|(calculated)}}[3]
{{val|14.24|0.17}} km[6]
{{val|14.782|0.081}} km[7]
{{val|15.98|0.35}} km[8]
| rotation = {{val|6.13|0.01}} h[9]
| albedo = {{val|0.093|0.004}}[8]
{{val|0.1066|0.0037}}[7]
{{val|0.126|0.031}}[6]
0.20 {{small|(assumed)}}[3]
| spectral_type = SMASS = Xc 
M [7]{{·}}C [16]{{·}}X [3]
| abs_magnitude = 12.10[6]{{·}}{{val|12.15|0.22}}[16]{{·}}12.2[3][7][8]
}}

1998 Titius, provisional designation {{mp|1938 DX|1}}, is a metallic–carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter.

It was discovered on 24 February 1938, by German astronomer Alfred Bohrmann at Heidelberg Observatory in southern Germany.[24] On the same night, the body was also observed at the Finnish Turku Observatory.[24] It was later named after astronomer Johann Daniel Titius.[2]

Orbit and classification

Titius orbits the Sun in the inner main-belt at a distance of 2.3–2.6 AU once every 3 years and 9 months (1,375 days). Its orbit has an eccentricity of 0.06 and an inclination of 8° with respect to the ecliptic. It stays in a 2:1 orbital resonance with the planet Mars.[28] Titius{{'}} observation arc starts on the night following its official discovery observation.[24]

Physical characteristics

Diameter and albedo

According to observations carried out by the Japanese Akari and NASA's Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, Titius has an albedo between 0.093 and 0.126, and its diameter measures between 14.2 and 16.0 kilometers.[6][7][8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.20 and calculates a diameter of 10.8 kilometers with an absolute magnitude of 12.2.[3]

Spectral type

Its spectral classification is that of a Xc-type asteroid in the SMASS taxonomy, a transitional spectral type between the two large main groups of metallic X-type and carbonaceous C-type asteroids. Both types are much darker than the stony S-type asteroids, which are also very common in the inner main-belt.[3] In addition, Titius is also classified as a M-type asteroid by WISE.[7]

Rotation period

A rotational lightcurve of Titius was obtained from photometric observations by American astronomer Robert Stephens at the Californian Santana Observatory in March 2002. Lightcurve analysis gave a rotation period of {{val|6.13|0.01}} hours, during which its brightness amplitude varies by {{val|0.30|0.04}} magnitude ({{small|U=3}}).[9]

Naming

This minor planet was named after German astronomer Johann Daniel Titius (1729–1796), best known for formulating the Titius-Bode law, which states that each subsequent planet in the Solar System is roughly twice as far from the Sun than the previous one. He is also honored by the lunar crater Titius.[2] The approved naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 4237}}).[39]

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1998) Titius |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 162 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1999 |chapter = (1998) Titius }}
2. ^1 2 3 {{cite web |title = 1998 Titius (1938 DX1) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1998 |accessdate = 8 December 2016}}
3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 8 December 2016}}
4. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (1998) Titius |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1998%7CTitius |accessdate = 8 December 2016}}
5. ^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= 8 December 2016}}
6. ^1 2 3 4 5 6 {{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 }}
7. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = A. K. |last2 = Mainzer |first3 = T. |last3 = Grav |first4 = J. M. |last4 = Bauer |first5 = R. M. |last5 = Cutri |first6 = C. |last6 = Nugent |first7 = M. S. |last7 = Cabrera |date = November 2012 |title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M |journal = The Astrophysical Journal Letters |volume = 759 |issue = 1 |page = 5 |bibcode = 2012ApJ...759L...8M |doi = 10.1088/2041-8205/759/1/L8 |arxiv = 1209.5794 |access-date= 8 December 2016}}
8. ^1 2 {{Cite journal |author = Stephens, R. D. |date = September 2002 |title = Photometry of 973 Aralia, 1189 Terentia, 1040 Klumpkea, and 1998 Titius |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MPBu...29...47S |journal = The Minor Planet Bulletin |volume = 29 |pages = 47–48 |bibcode = 2002MPBu...29...47S |access-date= 8 December 2016}}
9. ^1 2 {{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= 8 December 2016}}
10. ^1 {{cite journal |author = Gallardo, Tabaré |author2 = Venturini, Julia |author3 = Roig, Fernando |author4 = Gil-Hutton, Ricardo |date = August 2011 |title = Origin and sustainability of the population of asteroids captured in the exterior resonance 1:2 with Mars |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011Icar..214..632G |journal = Icarus |volume = 214 |issue = 2 |pages = 632–644 |bibcode = 2011Icar..214..632G |doi = 10.1016/j.icarus.2011.05.029 |arxiv = 1105.5108 |access-date= 15 December 2015}}
[1][2][3][4][5][6][7][8][9][10]

}}

External links

  • 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 (1)-(5000) – Minor Planet Center
  • {{JPL small body}}
{{Minor planets navigator|1997 Leverrier|number=1998|1999 Hirayama}}{{Small Solar System bodies}}{{DEFAULTSORT:Titius}}

6 : Background asteroids|Discoveries by Alfred Bohrmann|Minor planets named for people|Named minor planets|Xc-type asteroids (SMASS)|Astronomical objects discovered in 1938
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：2024/11/16 6:18:41