Mining the ESO WFI and INT WFC archives for known Near Earth Asteroids. Mega-Precovery software

The ESO/MPG WFI and the INT WFC wide field archives comprising 330,000 images were mined to search for serendipitous encounters of known Near Earth Asteroids (NEAs) and Potentially Hazardous Asteroids (PHAs). A total of 152 asteroids (44 PHAs and 108 other NEAs) were identified using the PRECOVERY software, their astrometry being measured on 761 images and sent to the Minor Planet Centre. Both recoveries and precoveries were reported, including prolonged orbital arcs for 18 precovered objects and 10 recoveries. We analyze all new opposition data by comparing the orbits fitted before and after including our contributions. We conclude the paper presenting Mega-Precovery, a new online service focused on data mining of many instrument archives simultaneously for one or a few given asteroids. A total of 28 instrument archives have been made available for mining using this tool, adding together about 2.5 million images forming the Mega-Archive.Comment: Accepted for publication in Astronomische Nachrichten (Sep 2012

ORTOFOTOMAPS USE AND SYSTEM GNSS POSITION DETERMINATION ROMPOS PROJECT MANAGEMENT MINE CLOSURE IN MARAMUREŞ COUNTY THE USE OF GIS

Is the use ortofotomaps and GNSS position determination system ROMPOS, project management of mine closures, the current concern to policy makers in the county of Maramures. In making decisions on mine closure project management can use GNSS positioning systems positioning and target areas ortofotomaps scale 1:1000, 1:2000 or 1:5000. Good decisions in drafting mine closures has to their conservation and environmental protection, and can be more easily taken knowingly when using ortofotomaps and GNSS positioning systems ROMPOS with Information Systems Geographic, which are indispensable in all fields, and particularly in developing these projects. presented previously are parts of GNSS positioning system ROMPOS, its use in decision making on projects of mine closures and benefits arising from this use in this area. In the final draw general conclusions and specific to look at using GNSS positioning systems ROMPOS ortofotomaps position determination and decision making on projects of mine closures, but the usefulness and speed in making decision systems using these relatively new in Romania, and especially in Maramures count

Mars climate engineering using orbiting solar reflectors

The manned mission is seen as a first step towards a Mars surface exploration base-station and, later, establishing permanent settlement. The location and use of Mars's natural resources is vital to enable cost-effective long-duration human exploration and exploitation missions as well as subsequent human colonization. Planet resources include various crust-lodged materials, a low-pressure natural atmosphere, assorted forms of utilizable energy, lower gravity than Earth's, and ground placement advantages relative to human operability and living standards. Power resources may include using solar and wind energy, importation of nuclear reactors and the harvesting of geothermal potential. In fact, a new branch of human civilization could be established permanently on Mars in the next century. But, meantime, an inventory and proper social assessment of Mars's prospective energy and material resources is required. This book investigates the possibilities and limitations of various systems supplying manned bases on Mars with energy and other vital resources. The book collects together recent proposals and innovative options and solutions. It is a useful source of condensed information for specialists involved in current and impending Mars-related activities and a good starting point for young researchers

Pinpointing the Molecular Gas within a Lyman Alpha Blob at z ~ 2.7

We present IRAM PdBI observations of the CO(3-2) and CO(5-4) line transitions from a Ly-alpha blob at z~2.7 in order to investigate the gas kinematics, determine the location of the dominant energy source, and study the physical conditions of the molecular gas. CO line and dust continuum emission are detected at the location of a strong MIPS source that is offset by ~1.5" from the Ly-alpha peak. Neither of these emission components is resolved with the 1.7" beam, showing that the gas and dust are confined to within ~7kpc from this galaxy. No millimeter source is found at the location of the Ly-alpha peak, ruling out a central compact source of star formation as the power source for the Ly-alpha emission. Combined with a spatially-resolved spectrum of Ly-alpha and HeII, we constrain the kinematics of the extended gas using the CO emission as a tracer of the systemic redshift. Near the MIPS source, the Ly-alpha profile is symmetric and its line center agrees with that of CO line, implying that there are no significant bulk flows and that the photo-ionization from the MIPS source might be the dominant source of the Ly-alpha emission. In the region near the Ly-alpha peak, the gas is slowly receding (~100km/s) with respect to the MIPS source, thus making the hyper-/superwind hypothesis unlikely. We find a sub-thermal line ratio between two CO transitions, I_CO(5-4)/I_CO(3-2)=0.97+/-0.21. This line ratio is lower than the average values found in high-z SMGs and QSOs, but consistent with the value found in the Galactic center, suggesting that there is a large reservoir of low-density molecular gas that is spread over the MIPS source and its vicinity.Comment: 12 pages, 9 figures, accepted for publication in Ap

Apparent close approaches between near-Earth asteroids and quasars. Precise astrometry and frame linking

Reproduced with permission. Copyright ESO. Article published by EDP Sciences and available at www.aanda.org.International audienceAims. We investigate the link between the International Celestial Reference Frame (ICRF) and the dynamical reference frame realized by the ephemerides of the Solar System bodies. Methods. We propose a procedure that implies a selection of events for asteroids with accurately determined orbits crossing the CCD field containing selected quasars. Using a Bulirsch-Stoer numerical integrator, we constructed 8-years (2010-2018) ephemerides for a set of 836 numbered near-Earth asteroids (NEAs). We searched for close encounters (within a typical field of view of groundbased telescopes) between our selected set of asteroids and quasars with high-accuracy astrometric positions extracted from the Large Quasars Astrometric Catalog (LQAC). Results. In the designated period (2010-2018), we found a number of 2924, 14 257, and 6972 close approaches (within 10') between asteroids with a minimum solar elongation value of 60◦and quasars from the ICRF-Ext2, the Very Large Baseline Array Calibrator Survey (VLBA-CS), and the Very Large Array (VLA), respectively. This large number of close encounters provides the observational basis needed to investigate the link between the dynamical reference frame and the ICRF

ASPECTS ON THEORETICAL ANALYSIS OF WORKING PROCESS PERFORMED BY TECHNICAL EQUIPMENTS FOR CHOPPING PLANT DEBRIS IN ORDER TO CLEAR THE FIELD

The paper presents theoretical aspects on working process of rotors of technical equipments designed for chopping vegetal debris and fodders. Generally, the chopping devices with rotor, with the rotor axle in horizontal plane and normal position (perpendicular) with the machinery moving direction are used for constructing equipments for harvesting fodder crops or for those of chopping vegetal debris where they perform multiple tasks. They make the cutting, the chopping of plants and throwing the chopped material into the collecting trail or, with the case of cutting and chopping machinery, the evenly spreading of chopped material over the soil surface. The main factors that influence the chopping degree are the physical – mechanical features of the chopping material that are very different with the crop variety and the constructive and functional parameters of the chopping device

THE ANALYSIS OF THE EXPERIMENTAL RESULTS AND OPTIMIZATION OF SEEDBED PREPARATION WITH WINTER WHEAT CROP

The paper presents experimental results and the optimization of several variants for seedbed preparation for winter wheat crop. There are taken into account six technological variants for seedbed preparation and there were studied, after sowing, the soil penetration resistance and soil structural aggregates water stability as well as the fuel consumption per hectare, the yield and there were made recommendations on the best options for conservative tillages