4 Vesta

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4 Vesta  Simbol astrologi modhèrn Vesta
Vesta from Dawn, July 17.jpg
Kawah Rheasilvia sing nyakup sebagéan gedhé wilahan kidul Vesta. Gambar dijupuk kanthi montor mabur ruwang akasa Dawn
Panemon
Panemu Heinrich Wilhelm Olbers
Tanggal ditemokaké 29 Maret 1807
Penamaan
Kategori
planet minor
Sabuk utama (Keluwarga Vesta)
Epos 14 Mei 2008 (Dina Julian 2454600.5)
Aphelion 384,72 Gm (2,572 SA)
Perihelion 321,82 Gm (2,151 SA)
Sumbu semi-mayor 353,268 Gm (2,361 SA)
Eksentrisitas 0,089 17
Periode orbit 3,63 a (1325,15 Dina)
Kecepatan orbit rata-rata 19,34 km/dtk
Anomali rata-rata 90,53°
Inklinasi 7,135° menyang Ekliptika
5,56° menyang bidang invariabel[2]
Bujur node menaik 103,91°
Argumen perihelion 149,83°
Ciri-ciri fisik
Dimensi 578×560×458 km[3]
529 km (rata-rata)
Massa (2,67 ± 0,02)×1020 kg[4]
Kepadatan rata-rata 3,42 g/cm³[4]
Gravitasi permukaan di khatulistiwa 0,22 m/det²
Kecepatan lepas 0,35 km/det
Periode rotasi 0,222 6 dina (5.342 jam)[1][5]
Albedo 0,423 (géomètrik)[6]
Suhu min: 85 K (−188 °C)
maks: 255 K (−18 °C)[7]
Kelas spektrum Asteroid tipe V[1][8]
Magnitudo tampak 5,1[9] tekan 8,48
Magnitudo mutlak (H) 3,20[1][6]
Ukuran sudut 0,64" tekan 0,20"

4 Vesta iku objèk paling gedhé kaloro ing sabuk asteroid, kanthi dhiamèter 530 kilomèter (watara 330 mil)[1] lan diprakirakaké duwé massa 9% saka massa kabèh sabuk asteroid.[10] 4 Vesta ditemokaké déning astronom Jerman Heinrich Wilhelm Olbers nalika tanggal 29 Maret 1807.[1] Jeneng Vesta dijupuk saka jeneng dèwi kenya jroning mitologi Romawi, sing arupa dèwi pangreksa kanggo omah lan panggenian.

Vesta kèlangan watara 1% saka massané jroning sawijining tabrakan sing dumadi kurang saka samilyar taun kepungkur. Akèh serpihan-serpihan saka kedadèyan iki sing tiba menyang bumi minangka meteorit HED, sawijining sumber bukti sing akèh ngenani asteroid.[11] Vesta iku asteroid sing paling padhang. Let paling adoh Vesta saka Srengéngé iku sithik luwih adoh tinimbang let minimum antarané Ceres lan Srengéngé,[12] éwadéné orbit Vesta sepenuhé ana ing njero orbit Ceres.[13]

Réferènsi[sunting | sunting sumber]

  1. ^ a b c d e f "JPL Small-Body Database Browser: 4 Vesta". http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=4. Retrieved 2008-06-01.
  2. ^ "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 2009-04-03. Archived from the original on 2009-04-20. http://web.archive.org/20090420194536/home.comcast.net/~kpheider/MeanPlane.gif. Retrieved 2009-04-10. (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane)
  3. ^ Thomas, P. C.; et al. (1997). "Impact excavation on asteroid 4 Vesta: Hubble Space Telescope results". Science 277: 1492. doi:10.1126/science.277.5331.1492.
  4. ^ a b Baer, James; Chesley, Steven R. (2008). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris" (PDF). Celestial Mechanics and Dynamical Astronomy (Springer Science+Business Media B.V. 2007) 100 (2008): 27–42. doi:10.1007/s10569-007-9103-8. http://www.springerlink.com/content/h747307j43863228/fulltext.pdf. Retrieved 2008-11-11.
  5. ^ Harris, A. W.; Warner, B. D.; Pravec, P.; (Eds.) (2006). "Asteroid Lightcurve Derived Data. EAR-A-5-DDR-DERIVED-LIGHTCURVE-V8.0.". NASA Planetary Data System. http://www.psi.edu/pds/resource/lc.html. Retrieved 2007-03-15.
  6. ^ a b Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (2004). "Infra-Red Astronomy Satellite (IRAS) Minor Planet Survey. IRAS-A-FPA-3-RDR-IMPS-V6.0.". NASA Planetary Data System. http://www.psi.edu/pds/resource/imps.html. Retrieved 2007-03-15.
  7. ^ Mueller, T. G.; Metcalfe, L. (2001). "ISO and Asteroids". European Space Agency (ESA) bulletin 108: 38. http://www.esa.int/esapub/bulletin/bullet108/chapter4_bul108.pdf.
  8. ^ Neese, C.; Ed. (2005). "Asteroid Taxonomy EAR-A-5-DDR-TAXONOMY-V5.0". NASA Planetary Data System. http://www.psi.edu/pds/resource/taxonomy.html. Retrieved 2007-03-15.
  9. ^ Menzel, Donald H.; and Pasachoff, Jay M. (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. pp. 391. ISBN 0395348358.
  10. ^ Pitjeva, E. V. (2005). "High-Precision Ephemerides of Planets—EPM and Determination of Some Astronomical Constants" (PDF). Solar System Research 39 (3): 176. doi:10.1007/s11208-005-0033-2. http://iau-comm4.jpl.nasa.gov/EPM2004.pdf.
  11. ^ Kelley, M. S.; et al. (2003). "Quantified mineralogical evidence for a common origin of 1929 Kollaa with 4 Vesta and the HED meteorites". Icarus 165: 215. doi:10.1016/S0019-1035(03)00149-0.
  12. ^ Nalika perihelion Ceres ing tanggal 10 Februari 2009, Ceres bakal luwih cedhak menyang Srengéngé tinimbang Vesta, amarga Vesta duwé let aphelion sing luwih gedhé tinimbang let perihelion Ceres. (10-02-2009: Vesta 2,56 SA; Ceres 2,54 SA)
  13. ^ "Ceres, Pallas Vesta and Hygiea". Gravity Simulator. http://www.orbitsimulator.com/gravity/articles/ceres.html. Retrieved 2008-05-31.

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