astro.wikisort.org - Asteroid
Veritas, minor planet designation 490 Veritas, is a carbonaceous Veritasian asteroid, which may have been involved in one of the more massive asteroid-asteroid collisions of the past 100 million years. It was discovered by German astronomer Max Wolf at Heidelberg Observatory on 3 September 1902.
| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery site | Heidelberg Obs. |
| Discovery date | 3 September 1902 |
| Designations | |
MPC designation | (490) Veritas |
| Pronunciation | /ˈvɛrɪtæs/[1] |
Alternative designations | 1902 JP |
Minor planet category | main-belt · (outer) Veritas [2] |
| Adjectives | Veritasian[3] |
| Orbital characteristics[4] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.37 yr (41409 d) |
| Aphelion | 3.4715 AU (519.33 Gm) |
| Perihelion | 2.8719 AU (429.63 Gm) |
Semi-major axis | 3.1717 AU (474.48 Gm) |
| Eccentricity | 0.094527 |
Orbital period (sidereal) | 5.65 yr (2063.2 d) |
Mean anomaly | 31.094° |
Mean motion | 0° 10m 28.164s / day |
| Inclination | 9.2809° |
Longitude of ascending node | 178.335° |
Argument of perihelion | 194.390° |
| Earth MOID | 1.87147 AU (279.968 Gm) |
| Jupiter MOID | 1.98443 AU (296.867 Gm) |
| TJupiter | 3.175 |
| Physical characteristics | |
| Dimensions | 110.96 ± 3.80 km[5] 115.55±5.5 km[4] |
| Mass | (5.99 ± 2.23) × 1018 kg[5] |
Mean density | 8.37 ± 3.23 g/cm3[5] |
Synodic rotation period | 7.930 h (0.3304 d) |
Geometric albedo | 0.0622±0.006 |
Absolute magnitude (H) | 8.53,[6] 8.32[4] |
Description
With an diameter of more than 100 kilometers, Veritas is the largest member and namesake of the Veritas family, a mid-sized asteroid family of carbonaceous asteroids in the outer main-belt, that formed recently approximately 8.5±0.5 million years ago.[2][7]: 8, 23 David Nesvorný of the Southwest Research Institute in Boulder traced the orbits of these bodies back in time, and calculated that they formed in a collision of a body at least 150 km in diameter with a smaller asteroid. Veritas and Undina would have been the largest fragments of that collision which caused a "late Miocene dust shower". The family consists of more than a thousand known members including 1086 Nata, 2428 Kamenyar and 2934 Aristophanes.
Late Miocene dust shower
Substantiating Nesvorný's estimate, Kenneth Farley et al. found evidence in sea-floor sediments of a fourfold increase in the amount of cosmic dust reaching Earth's surface, which began 8.2 million years ago and tapered off over the next million and a half years. This is one of the largest increases in dust deposits of the past 100 million years.[8]
The suspected Veritas collision would have been too far from Jupiter for the fragments to have been slung into a collision course with Earth. However, solar radiation would have caused the resulting dust to drift inward to Earth orbit over a time span consistent with the record of dust in the ocean sediment.
Today continuing collisions among Veritas-family asteroids are estimated to send five thousand tons of cosmic dust to Earth each year, 15% of the total.
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- "Asteroid 490 Veritas – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 24 October 2019.
- James Morrow (1990) City of Truth
- Yeomans, Donald K., "490 Veritas", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 9 May 2016.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34 (4): 113–119, Bibcode:2007MPBu...34..113W.
- Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). Identification and Dynamical Properties of Asteroid Families. Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
- Farley, Kenneth A.; Vokrouhlický, David; Bottke, William F.; Nesvorný, David (January 2006). "A late Miocene dust shower from the break-up of an asteroid in the main belt" (PDF). Nature. 439 (7074): 295–297. Bibcode:2006Natur.439..295F. doi:10.1038/nature04391. PMID 16421563. Retrieved 4 September 2017.
External links
- The Asteroid Veritas: An intruder in a family named after it?
- Lightcurve plot of (490) Veritas, Antelope Hills Observatory
- "Asteroid Smashup Yields Dust Shower on Earth" from SkyandTelescope.com, Jan. 20, 2006.
- 490 Veritas at AstDyS-2, Asteroids—Dynamic Site
- 490 Veritas at the JPL Small-Body Database
На других языках
[de] (490) Veritas
(490) Veritas ist ein Asteroid des Hauptgürtels, der am 3. September 1902 vom deutschen Astronomen Max Wolf in Heidelberg entdeckt wurde.- [en] 490 Veritas
[es] (490) Veritas
(490) Veritas es un asteroide perteneciente al cinturón de asteroides descubierto el 3 de septiembre de 1902 por Maximilian Franz Wolf desde el observatorio de Heidelberg-Königstuhl, Alemania. Está nombrado por Veritas, una diosa de la mitología romana.[2] Forma parte de la familia asteroidal de Veritas.[3][ru] (490) Веритас
(490) Ве́ритас (лат. Veritas) — астероид главного пояса, который принадлежит к тёмному спектральному классу C и входит в состав семейства Веритас. Он был открыт 3 сентября 1902 года немецким астрономом Максом Вольфом в обсерватории Хайдельберг в Германии и назван в честь римской богини правды и истины Веритас[3].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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