വെസ്റ്റ
ഛിന്നഗ്രഹം
സൗരയൂഥത്തിലെ ആസ്റ്ററോയിഡ് ബെൽറ്റിൽ ഉള്ള വലിപ്പത്തിൽ മൂന്നാം സ്ഥാനമുള്ള ഒരു ആസ്റ്ററോയിഡ് (ഛിന്നഗ്രഹം) ആണ് വെസ്റ്റ (4 Vesta).525 കിലോമീറ്റർ (326 mi) വ്യാസമുണ്ട്‌. 1807 മാർച്ച്‌ 29ന് ജർമൻ വാനശാസ്ത്രജ്ഞനായ ഹെൻറിച്ച് വിൽഹെം ഓൾബർസ് ആണ് ഈ ആസ്റ്ററോയിഡ് ആദ്യമായി നിരീക്ഷിച്ചത്.
 Composite greyscale image of Vesta taken by Dawn | |
| കണ്ടെത്തൽ | |
|---|---|
| കണ്ടെത്തിയത് | Heinrich Wilhelm Olbers |
| കണ്ടെത്തിയ തിയതി | 29 March 1807 |
| വിശേഷണങ്ങൾ | |
| ഉച്ചാരണം | /ˈvɛstə/ |
പേരിട്ടിരിക്കുന്നത് | Vesta |
| Main belt (Vesta family) | |
| Adjectives | Vestan, Vestian[* 1] |
| ഭ്രമണപഥത്തിന്റെ സവിശേഷതകൾ[5] | |
| ഇപ്പോക്ക് 2014-Dec-09 (JD 2457000.5) | |
| അപസൗരത്തിലെ ദൂരം | 2.57138 AU |
| ഉപസൗരത്തിലെ ദൂരം | 2.15221 AU |
| 2.36179 AU | |
| എക്സൻട്രിസിറ്റി | 0.08874 |
| 3.63 yr (1325.75 d) | |
Average പരിക്രമണവേഗം | 19.34 km/s |
| 20.86384° | |
| ചെരിവ് | 7.14043° to ecliptic 5.56° to invariable plane[4] |
| 103.85136° | |
| 151.19853° | |
| Satellites | None |
| ഭ്രമണ സവിശേഷതകൾ[6] | |
| 2.36151 AU | |
Proper eccentricity | 0.098758 |
Proper inclination | 6.39234° |
Proper mean motion | 99.1888 deg / yr |
Proper orbital period | 3.62944 yr (1325.654 d) |
Precession of perihelion | 36.8729 (2343 years) arcsec / yr |
Precession of the ascending node | −39.5979 (2182 years) arcsec / yr |
| ഭൗതിക സവിശേഷതകൾ | |
| അളവുകൾ | (572.6 × 557.2 × 446.4) ± 0.2 km[7] 525.4±0.2 km (mean) |
| Flattening | 0.2204 |
| 867 000 km2[8] | |
| വ്യാപ്തം | 74 600 000 km3[8] |
| പിണ്ഡം | (2.59076±0.00001)×1020 കി.g[7] |
ശരാശരി സാന്ദ്രത | 3.456 g/cm³[7] |
| 0.25 m/s2 0.025 g | |
| 0.36 km/s | |
| 0.2226 d (5.342 h)[5][9] | |
Equatorial rotation velocity | 257.5 m/s[8] |
| അൽബിഡോ | 0.423 (geometric)[10] |
| താപനില | min: 85 K (−188 °C) max: 270 K (−3 °C)[11] |
Spectral type | V-type asteroid[5][12] |
| 5.1[13] to 8.48 | |
| 3.20[5][10] | |
| 0.70″ to 0.22″ | |
.svg){kind=small}
അവലംബം
തിരുത്തുക
- ↑ Marc Rayman of the JPL Dawn team used "Vestian" a few times in 2010 and early 2011 in his Dawn Journal. However, since that time, and outside the journal, the form "Vestan" has been used by JPL.[1] Most modern print sources also use "Vestan",[2] though the Planetary Society continues to use "Vestian".[3] The form "Vestalian" correctly refers to people or things associated with Vesta, such as the vestal virgins, not to Vesta herself.
- ↑ Dawn Mission: Search
- ↑ Meteoritics & planetary science, Volume 42, Issues 6–8, 2007; Origin and evolution of Earth, National Research Council et al., 2008
- ↑ "Search Results | The Planetary Society". Archived from the original on 2020-07-27. Retrieved 2015-09-03.
- ↑ "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 3 April 2009. Retrieved 10 April 2009. (produced with Solex 10 Archived 2015-05-24 at the Wayback Machine. written by Aldo Vitagliano; see also Invariable plane)
- ↑ 5.0 5.1 5.2 5.3 "JPL Small-Body Database Browser: 4 Vesta". Retrieved 1 June 2008.
- ↑ "AstDyS-2 Vesta Synthetic Proper Orbital Elements". Department of Mathematics, University of Pisa, Italy. Retrieved 1 October 2011.
- ↑ 7.0 7.1 7.2 Russell, C. T.; et al. (2012). "Dawn at Vesta: Testing the Protoplanetary Paradigm". Science. 336 (6082): 684–686. Bibcode:2012Sci...336..684R. doi:10.1126/science.1219381.
- ↑ 8.0 8.1 8.2 Calculated based on the known parameters
- ↑ Harris, A. W. (2006). Warner, B. D.; Pravec, P (eds.). "Asteroid Lightcurve Derived Data. EAR-A-5-DDR-DERIVED-LIGHTCURVE-V8.0". NASA Planetary Data System. Archived from the original on 2009-04-09. Retrieved 2013-12-26.
{{cite web}}: CS1 maint: bot: original URL status unknown (link) - ↑ 10.0 10.1 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. Archived from the original on 2007-03-11. Retrieved 15 March 2007.
- ↑ Mueller, T. G.; Metcalfe, L. (2001). "ISO and Asteroids" (PDF). European Space Agency (ESA) bulletin. 108: 38.
- ↑ Neese, C.; Ed. (2005). "Asteroid Taxonomy EAR-A-5-DDR-TAXONOMY-V5.0". NASA Planetary Data System. Archived from the original on 2006-09-05. Retrieved 2013-12-25.
- ↑ Menzel, Donald H.; Pasachoff, Jay M. (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 0-395-34835-8.
{{cite book}}: Unknown parameter|last-author-amp=ignored (|name-list-style=suggested) (help)
