scholarly journals Basaltic material in the main belt: a tale of two (or more) parent bodies?

2018 ◽  
Vol 479 (2) ◽  
pp. 2607-2614 ◽  
Author(s):  
S Ieva ◽  
E Dotto ◽  
D Lazzaro ◽  
D Fulvio ◽  
D Perna ◽  
...  
Keyword(s):  
Main Belt ◽  
Basaltic Material

scholarly journals Distribution and spectrophotometric classification of basaltic asteroids

2019 ◽  
Vol 491 (4) ◽  
pp. 5966-5979
Author(s):  
J-A Mansour ◽  
M Popescu ◽  
J de León ◽  
J Licandro
Keyword(s):  
Semimajor Axis ◽  
Laboratory Data ◽  
Asteroid Belt ◽  
Main Belt ◽  
Spectrophotometric Data ◽  
Main Asteroid Belt ◽  
Different Origin ◽  
Colour Indices ◽  
Basaltic Material

ABSTRACT We aim to determine the distribution of basaltic asteroids (classified as V-types) based on the spectrophotometric data reported in the MOVIS-C catalogue. A total of 782 asteroids were identified. The observations with all four filters (Y, J, H, Ks), available for 297 of these candidates, allow a reliable comparison with the laboratory data of howardite, eucrite, and diogenite meteorites. We found that the majority of the basaltic candidates (≈95${{\ \rm per\ cent}}$) are located in the inner main belt, while only 29 (≈4${{\ \rm per\ cent}}$) and 8 (≈1${{\ \rm per\ cent}}$) are located in the middle (MMB) and outer main belt (OMB), respectively. A fraction of ≈33${{\ \rm per\ cent}}$ from the V-type candidates is associated with the Vesta family (with respect to AstDyS). We also identified four MMB V-type candidates belonging to (15) Eunomia family, and another four low inclination ones corresponding to (135) Hertha. We report differences between the colour indices and albedo distributions of the V-type candidates located in the inner main belt compared to those from the MMB and OMB. These results support the hypothesis of a different origin for the basaltic asteroids with a semimajor axis beyond 2.5 au. Furthermore, lithological differences are present between the vestoids and the inner low inclination basaltic asteroids. The data allow us to estimate the unbiased distribution of basaltic asteroids across the main asteroid belt. We highlight that at least 80${{\ \rm per\ cent}}$ of the ejected basaltic material from (4) Vesta is missing or is not yet detected because it is fragmented in sizes smaller than 1 km.

Brief summary of Kleť photographic search programme for minor planets

1999 ◽  
Vol 173 ◽  
pp. 189-192
Author(s):  
J. Tichá ◽  
M. Tichý ◽  
Z. Moravec
Keyword(s):  
Ccd Camera ◽  
Minor Planet ◽  
Minor Planets ◽  
Main Belt

AbstractA long-term photographic search programme for minor planets was begun at the Kleť Observatory at the end of seventies using a 0.63-m Maksutov telescope, but with insufficient respect for long-arc follow-up astrometry. More than two thousand provisional designations were given to new Kleť discoveries. Since 1993 targeted follow-up astrometry of Kleť candidates has been performed with a 0.57-m reflector equipped with a CCD camera, and reliable orbits for many previous Kleť discoveries have been determined. The photographic programme results in more than 350 numbered minor planets credited to Kleť, one of the world's most prolific discovery sites. Nearly 50 per cent of them were numbered as a consequence of CCD follow-up observations since 1994.This brief summary describes the results of this Kleť photographic minor planet survey between 1977 and 1996. The majority of the Kleť photographic discoveries are main belt asteroids, but two Amor type asteroids and one Trojan have been found.

A simulated gravity field estimation for the main belt comet 133P/Elst-Pizarro

2021 ◽  
Vol 366 (6) ◽  
Author(s):  
Wutong Gao ◽  
Jianguo Yan ◽  
Weitong Jin ◽  
Chen Yang ◽  
Linzhi Meng ◽  
...  
Keyword(s):  
Gravity Field ◽  
Main Belt ◽  
Field Estimation

scholarly journals New Tools for the Optimized Follow-Up of Imminent Impactors

Universe ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 10
Author(s):  
Maddalena Mochi ◽  
Giacomo Tommei
Keyword(s):  
Orbit Determination ◽  
Main Belt ◽  
Impact Monitoring ◽  
The Earth ◽  
Current Observation ◽  
Short Period ◽  
Fly Eye ◽  
Near Earth Asteroids ◽  
Near Earth Objects

The solar system is populated with, other than planets, a wide variety of minor bodies, the majority of which are represented by asteroids. Most of their orbits are comprised of those between Mars and Jupiter, thus forming a population named Main Belt. However, some asteroids can run on trajectories that come close to, or even intersect, the orbit of the Earth. These objects are known as Near Earth Asteroids (NEAs) or Near Earth Objects (NEOs) and may entail a risk of collision with our planet. Predicting the occurrence of such collisions as early as possible is the task of Impact Monitoring (IM). Dedicated algorithms are in charge of orbit determination and risk assessment for any detected NEO, but their efficiency is limited in cases in which the object has been observed for a short period of time, as is the case with newly discovered asteroids and, more worryingly, imminent impactors: objects due to hit the Earth, detected only a few days or hours in advance of impacts. This timespan might be too short to take any effective safety countermeasure. For this reason, a necessary improvement of current observation capabilities is underway through the construction of dedicated telescopes, e.g., the NEO Survey Telescope (NEOSTEL), also known as “Fly-Eye”. Thanks to these developments, the number of discovered NEOs and, consequently, imminent impactors detected per year, is expected to increase, thus requiring an improvement of the methods and algorithms used to handle such cases. In this paper we present two new tools, based on the Admissible Region (AR) concept, dedicated to the observers, aiming to facilitate the planning of follow-up observations of NEOs by rapidly assessing the possibility of them being imminent impactors and the remaining visibility time from any given station.

scholarly journals PHOTOMETRY OF SELECTED OUTER MAIN BELT ASTEROIDS

2021 ◽  
pp. 105248
Author(s):  
V.G. Shevchenko ◽  
O.I. Mikhalchenko ◽  
I.N. Belskaya ◽  
I.G. Slyusarev ◽  
V.G. Chiorny ◽  
...  
Keyword(s):  
Main Belt

Accessibility of Main-Belt Asteroids via Gravity Assists

2014 ◽  
Vol 37 (2) ◽  
pp. 623-632 ◽  
Author(s):  
Yang Chen ◽  
Hexi Baoyin ◽  
Junfeng Li
Keyword(s):  
Main Belt ◽  
Gravity Assists

scholarly journals The Castalia mission to Main Belt Comet 133P/Elst-Pizarro

2018 ◽  
Vol 62 (8) ◽  
pp. 1947-1976 ◽  
Author(s):  
C. Snodgrass ◽  
G.H. Jones ◽  
H. Boehnhardt ◽  
A. Gibbings ◽  
M. Homeister ◽  
...  
Keyword(s):  
Main Belt

scholarly journals Dynamical evolution of V-type photometric candidates in the outer main belt

2014 ◽  
Vol 444 (3) ◽  
pp. 2985-2992 ◽  
Author(s):  
M. E. Huaman ◽  
V. Carruba ◽  
R. C. Domingos
Keyword(s):  
Dynamical Evolution ◽  
Main Belt
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