4 Vesta
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Kawah Rheasilvia sing nyakup sebagéan gedhé wilahan kidul Vesta. Gambar dijupuk kanthi montor mabur ruwang akasa Dawn
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Panemon
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| Panemu | Heinrich Wilhelm Olbers |
| Tanggal ditemokaké | 29 Maret 1807 |
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Penamaan
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| 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° |
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Ciri-ciri fisik
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| 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]
- ^ 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.
- ^ "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 2009-04-03. http://home.comcast.net/~kpheider/MeanPlane.gif. Retrieved 2009-04-10. (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane)
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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)
- ^ "Ceres, Pallas Vesta and Hygiea". Gravity Simulator. http://www.orbitsimulator.com/gravity/articles/ceres.html. Retrieved 2008-05-31.
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