scholarly journals Ita-Crao Minor Planet Survey: Results and Prospects

1997 ◽  
Vol 165 ◽  
pp. 567-570
Author(s):  
N. S. Chernykh ◽  
A.G. Sokolsky
Keyword(s):  
Ccd Camera ◽  
Crimean Astrophysical Observatory ◽  
Minor Planet ◽  
Minor Planets ◽  
Earth Asteroid ◽  
The Future ◽  
Survey Results ◽  
Almost All ◽  
Near Earth Asteroids ◽  
Observation Programme

AbstractResults of minor planet observation programme that is made jointly by the Institute of Theoretical Astronomy and the Crimean Astrophysical Observatory during three decades with the Zeiss 40-cm double astrograph at Crimea are presented. Almost all permanently numbered minor planets were observed. A catalogue of astrometrical results obtained in the course of this survey contains more than 60 thousand minor planet positions. Many thousand unnumbered asteroids were discovered, 875 of which had received permanent numbers by June of 1996.In the development of this survey programme we plan to use another Crimean telescope – the fast 64-cm telescope of Richter and Slevogt system. We intend to equip it with a CCD camera and use it for searching and observation of the Near Earth Asteroids. In the future this CCD-telescope must be a part of the national Russian network for Near Earth Asteroid (NEA) observations.

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.

scholarly journals Precision of Ephemerides for Space Missions

1971 ◽  
Vol 12 ◽  
pp. 639-642 ◽  
Author(s):  
B.G. Marsden
Keyword(s):  
Space Missions ◽  
Crimean Astrophysical Observatory ◽  
Minor Planet ◽  
Minor Planets ◽  
Synodic Period

One of the most extensive programs of systematic observations of minor planets currently being conducted is that at the Crimean Astrophysical Observatory. The observed positions, together with the residuals from the predictions in the annual Ephemeris volumes, have been listed in the Minor Planet Circulars for several years now; and inspection of the residuals yields information about the accuracy of minor planet ephemerides as a whole.The observations are made using a 40 cmf/4 double astrograph, the limiting magnitude being about 18. Between June 1968 and October 1969, corresponding to one synodic period of an average minor planet, about 40 percent of all the numbered objects were observed. These observations may be regarded as reasonably representative of all the planets. Observations were made of 60 of the objects with numbers in the 100’s and only 29 of those in the 1100’s, but in general the distribution was surprisingly uniform.

Spectroscopic investigation of the large Potentially Hazardous Asteroid (52768) 1998OR2 within NEOROCKS EU project

2020 ◽  
Author(s):  
Monica Lazzarin ◽  
Fiorangela La Forgia ◽  
Alessandro Siviero ◽  
Paolo Ochner ◽  
Elisa Frattin ◽  
...  
Keyword(s):  
Rare Event ◽  
Reflectance Spectroscopy ◽  
Minor Planet ◽  
Minor Planets ◽  
The European Union ◽  
Horizon 2020 ◽  
Earth Asteroid ◽  
Radar Images ◽  
Earth Object ◽  
Eu Project

<p>With an estimated diameter of about 2200m (http://neo.ssa.esa.int/), and a MOID (minimum orbital intersection distance) of 0.0154 au (6 Lunar Distances LD), (52768) 1998 OR2 is one of the largest known Potentially Hazardous Asteroid. On 29 April 2020 at 09:56 UTC 1998 OR2 had a very close passage to Earth at a distance of 0.042 au (16 LD). Close approaches by large asteroids like 1998 OR2 are a quite rare event.</p> <p>This asteroid has a highly eccentric orbit (e=0.57) with minor perturbations: this causes it to swap continuously. Moreover it is classified as Amor or Apollo asteroid  depending on the orbital phase.</p> <p>Within the NEOROCKS EU project (“The NEO Rapid Observation, Characterization and Key Simulations” - SU-SPACE-23-SEC-2019 from the Horizon 2020) - WP3-Task3.2 (Reflectance Spectroscopy) we observed 1998OR2 through the 120 cm “Galileo” telescope in Asiago using Boller & Chivens spectrograph instrument on 15 April 2020 when it was at 1.01 au heliocentric distance and 0.078 au distance from Earth.</p> <p> 1998 OR2, discovered on 24 July 1998 by NEAT program, is a fast rotator in the NEO population with a rotational period of 4.11 h  (Koehn et al, 2014; Skiff et al., 2019, and Warner and Stephens, 2020) and shows a large crater-like concavity through radar images (Virkki, A. K. 2020).</p> <p>Due to its rapid rotation, we were able to monitor the reflectance spectroscopy of 1998 OR2 for one nearly complete rotation during the night of 15 April 2020. We acquired 11 spectra, one every 20 minutes, spanning from 19:22 to 23.26 UTC. This allowed to investigate the possible variegation of the object across its surface and potentially connected with its big crater.</p> <p>It is unlikely that one of these large asteroids  could  impact the Earth over the next century, in fact also this asteroid poses no possibility of impact for at least the next 200 years, even if in its next close approach to Earth in 2079,  it will pass by close ,  about four times the lunar distance. It is however extremely important to keep these objects monitored and to investigate their physical and compositional properties to implement mitigation techniques.</p> <p>In this work we will present optical spectroscopic characterization of 1998 OR2 and the comparison of the taxonomic classification resulting from these spectra with the Xk obtained by Binzel et al. (2019). Additionally we will investigate its possible surface variegation according to the geometry of observation and the asteroid shape.</p> <p>Acknowledgement: This work has been performed within grant agreement No 870403 (project NEOROCKS) funded by the European Union’s Horizon 2020 research and innovation programme.</p> <p><strong>References</strong></p> <p>Koehn, Bruce W.; Bowell, Edward G.; Skiff, Brian A.; Sanborn, Jason J.; McLelland, Kyle P.; Pravec, Petr; et al. (October 2014). "Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS) - 2009 January through 2009 June". The Minor Planet Bulletin. <strong>41</strong> (4): 286–300</p> <p>Virkki, A. K. (23/04/2020) Planetary Radar Science Group. NAIC-Arecibo Observatory (http://www.naic.edu/~pradar/press/1998OR2.php)</p> <p>R.P.Binzel, F.E.DeMeo, E.V.Turtelboom, S.J.Bus, A.Tokunaga, T.H.Burbine, C.Lantz, D.Polishook, B.Carry, A.Morbidelli, M.Birlan, P.Vernazza, B.J.Burt, N.Moskovitz, S.M.Slivan, C.A.Thomas, A.S.Rivkin, M.D.Hicks, T.Dunn, V.Reddy, J.A.Sanchez, M.Granvik, T.Kohout, 2019, Compositional distributions and evolutionary processes for the near-Earth object population: Results from the MIT-Hawaii Near-Earth Object Spectroscopic Survey (MITHNEOS), Icarus, 324, 41.</p> <p>Warner, Brian D., Stephens, Robert D., Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2019 December - 2020 April<strong>, </strong>2020<strong>,  </strong>The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 47, No. 3, pp. 200-213.</p> <p>Brian A. Skiff, Kyle P. McLelland, Jason J. Sanborn, Petr Pravec, Bruce W. Koehn, 2019,  Lowell observatory near-earth asteroid photometric survey (NEAPS): paper 4, Minor Planet Bulletin 46.</p>

scholarly journals Klet Observatory – European Contribution to Detecting and Tracking of Near Earth Objects

2011 ◽  
Vol 7 ◽  
pp. 107-116
Author(s):  
Miloš Tichý
Keyword(s):  
Ccd Camera ◽  
Human Society ◽  
Minor Planets ◽  
Earth Object ◽  
The Earth ◽  
Orbit Computation ◽  
Near Earth Asteroids ◽  
International Strategies ◽  
Near Earth Objects

Near Earth Object (NEO) research is an expanding field of astronomy. Is is important for solar system science and also for protecting human society from asteroid and comet hazard.  A near-Earth object (NEO) can be defined as an asteroid or comet that has a possibility of making an approach to the Earth, or possibly even collide with it. The discovery rate of current NEO surveys reflects progressive improvement in a number of technical areas. An integral part of NEO discovery is astrometric follow-up fundamental for precise orbit computation and for the reasonable judging of future close encounters with the Earth including possible impact solutions. A wide international cooperation is fundamental for NEO research.  The Klet Observatory (South Bohemia, Czech Republic) is aimed especially at the confirmation, early follow-up, long-arc follow-up and recovery of Near Earth Objects. It ranks among the world´s most prolific professional NEO follow-up programmes.  The first NEO follow-up programme started at Klet in 1993 using 0.57-reflector equipped with a small CCD camera. A fundamental upgrade was made in 2002 when the 1.06-m KLENOT telescope was put into regular operation. The KLENOT Telescope is the largest telescope in Europe used exclusively for observations of minor planets (asteroids) and comets and full observing time is dedicated to the KLENOT team.  Equipment, technology, software, observing strategy and results of both the Klet Observatory NEO Project between 1993-2010 and the first phase of the KLENOT Project from March 2002 to September 2008 are presented. They consist of thousands of precise astrometric measurements of Near Earth Objects and also three newly discovered Near Earth Asteroids.  Klet Observatory NEO activities as well as our future plans fully reflect international strategies and cooperation in the field of NEO studies.

Statistical results on discovered near-Earth asteroids

1999 ◽  
Vol 173 ◽  
pp. 81-86
Author(s):  
S. Berinde
Keyword(s):  
Dynamical Evolution ◽  
Minor Planet ◽  
Orbital Elements ◽  
The Earth ◽  
Near Earth Asteroids ◽  
Statistical Results

AbstractThe first part of this paper gives a recent overview (until July 1st, 1998) of the Near-Earth Asteroids (NEAs) database stored at Minor Planet Center. Some statistical interpretations point out strong observational biases in the population of discovered NEAs, due to the preferential discoveries, depending on the objects’ distances and sizes. It is known that many newly discovered NEAs have no accurately determinated orbits because of the lack of observations. Consequently, it is hard to speak about future encounters and collisions with the Earth in terms of mutual distances between bodies. Because the dynamical evolution of asteroids’ orbits is less sensitive to the improvement of their orbital elements, we introduced a new subclass of NEAs named Earth-encounter asteroids in order to describe more reliably the potentially dangerous bodies as impactors with the Earth. So, we pay attention at those asteroids having an encounter between their orbits and that of the Earth within 100 years, trying to classify these encounters.

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

Pocket E-Li: Listening Assessment Made Easy

2019 ◽  
Vol 3 (1) ◽  
pp. 4
Author(s):  
Norazean Sulaiman ◽  
Nurul Nadiah Dewi Faizul Ganapathy ◽  
Wan Faizatul Azirah Ismayatim
Keyword(s):  
Mobile Application ◽  
Listening Comprehension ◽  
Teaching And Learning ◽  
Positive Response ◽  
Mobile Apps ◽  
Listening Skills ◽  
Current Technology ◽  
The Future ◽  
Level Of Understanding ◽  
Almost All

Listening skills should be given more attention as listening takes precedence over anything else when it comes to acquiring a language (Putriani, Sukirlan & Supriyadi, 2013). Even with the booming of various technology to facilitate teaching and learning of listening skills in class, the assessment conducted to identify students’ level of understanding of certain topic is still not up-to-date and not parallel with the advancement of technology. The current studies show that the use of mobile apps for listening purpose is proven to be effective in reducing students’ anxiety (Rahimi & Soleymani, 2015), sustaining students’ motivation (Read & Kukulska-Hulme, 2015), and improving students’ linguistic competencies (Ramos & Valderruten, 2017). This study is aimed to test the effectiveness of mobile application in assessing students’ listening skills. Diploma students from various faculties in UiTM Shah Alam were randomly chosen to answer listening comprehension questions via the prototype developed, named Pocket E-Li. The results demonstrate that the majority of the students provided positive response towards the implementation of mobile application for listening assessment. Almost all respondents agreed that listening assessment should be conducted via mobile application in the future. It can be concluded that listening assessment via mobile application is beneficial to students since it meets the students’ demands and needs which is equivalent with the use of current technology.

scholarly journals Improving the dynamical reference frame through minor planet orbit correction using crossing point observations

1988 ◽  
Vol 128 ◽  
pp. 55-60
Author(s):  
Arthur L. Whipple ◽  
Raynor L. Duncombe ◽  
Paul D. Hemenway
Keyword(s):  
Computer Program ◽  
Reference Frame ◽  
Reference System ◽  
Hubble Space Telescope ◽  
Simulated Data ◽  
Minor Planet ◽  
Minor Planets ◽  
Space Telescope ◽  
Orbit Correction ◽  
Crossing Point

We have begun a program to establish a dynamical reference frame based on the motions of minor planets. The program will utilize observations from the Hubble Space Telescope, and will ultimately tie the HIPPARCOS reference system to a dynamical base. Thirty-four minor planets, 20 of which are suitable for observation with the Hubble Space Telescope, have been selected. Ground based observations, particularly crossing-point observations with long focus reflectors, have been initiated.A computer program to simultaneously solve for the corrections of the orbits of the 34 minor planets including the crossing-point observations, was successfully run. The observations are treated by the method of W. H. Jeffreys. Using simulated data, solutions with and without crossing point observations demonstrate the value of those observations to produce a homogeneous and coherent set of results.

scholarly journals Patients’ Perceived Satisfaction Through Telephone-Assisted Tele-Consultation During the SARS-CoV-2 Pandemic Period: Observational Single-Centre Study at a Tertiary-Referral Colorectal Surgery Department

2021 ◽  
pp. 155335062110080
Author(s):  
Lara Blanco Terés ◽  
Carlos Cerdán Santacruz ◽  
Javier García Septiem ◽  
Rocío Maqueda González ◽  
José María Lopesino González ◽  
...  
Keyword(s):  
Categorical Variables ◽  
Average Score ◽  
Job Status ◽  
Perceived Satisfaction ◽  
The Future ◽  
Chi Squared ◽  
Single Centre Study ◽  
Set Up ◽  
Almost All ◽  
Surgery Department

Introduction: The pandemic produced by SARS-CoV-2 has obliged us to set up the tele-assistance to offer a continuity of care. This implies an innovation, being the degree of satisfaction of patients unknown. Methods: A telephonic survey was conducted with the validated in the Spanish tool Telehealth Usability Questionnaire (Telehealth Usability Questionnaire; rating from 1-7) of all candidate patients assisted consecutively in the Coloproctology Unit. We included demographic variables, education level, job status, diagnosis and consultation type. A descriptive study was done. The relationship between the willingness of consultation model in the future (telemedicine vs traditional) and the categorical variables was analysed through the chi-squared test. Results: A total of 115 patients were included. The average age was 59.9 years, being 60% women. The average score in each of the survey items was higher than 6 in all the questions but 1. 26.1% of the surveyed patients confessed being advocated to tele-assistance in the future. The only factors related to greater willingness to tele-assistance were male gender (37% vs 18.8%; P = .03) and a higher academic preparation level in favour of higher technical studies (35.9%) and university studies (32.4%) opposite to the rest ( P = .043). The rest of variables studied, job status, labour regimen, diagnostic group and consultation type did not show any relationship. Conclusions: A vast majority of patients answered favourably to almost all the items of the survey. However, only 26.1% of them would choose a model of tele-assistance without restrictions.

A Comparative Study on the Noise between Floors of Apartment and Multiplex Housing

2015 ◽  
Vol 752-753 ◽  
pp. 1232-1235
Author(s):  
Ji Hun Kim ◽  
Yoon Seok Shin
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Field Measurements ◽  
Apartment Building ◽  
Noise And Vibration ◽  
Korean Government ◽  
Current State ◽  
The Future ◽  
House Type ◽  
Almost All

Since recently almost all housing built in Korean have shared walls and floor, diverse problems are unavoidable including noise between floor arising from noise and vibration. Many efforts have been made by the Korean government, but the number of complaints related with the noise between floors has been gradually increasing. Therefore, through the field measurements by house type, the current state of noise was understood. To do this, the noise between floors was measured in an apartment household and a multiplex house to perform a comparative analysis. As the result, the differences in the noise between the two house types were clarified. The findings of this research are expected to contribute to reduction of the noise between floors in an apartment building in the future.

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