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198 results on '"Dimartino, M"'

4. Intercontinental Bistatic Radar Test Observation of Asteroid 1998 WT24

Author

Righini, S, Poppi, S, Montebugnoli, S, DiMartino, M, Saba, L, Delbo, M, Ostro, S, Monari, J, Poloni, M, and Orlati, A

Subjects
Astrophysics
Abstract

We describe the first intercontinental planetary radar test performed in Italy observing the near Earth asteroid (NEA) 33342 (1998 WT24) in December 2001 by means of the bistatic configurations Goldstone (California, USA)-Medicina (Italy) and Evpatoria (Ukraine)-Medicina. The experiment goal was to characterize the system for realtime radar follow-up observations of NEAs and artificial orbiting debris, in the framework of a feasibility study which aims at using the Sardinia Radio Telescope, at present under construction, also as a planetary radar facility. We report the preliminary results of the radar observations carried out by the IRA-CNR (Instituto di Radioastronomia - Consiglio Nazionale delle Ricerche) and the OATo (Osservatorio Astronomico di Torino) groups, aimed at exploring the scientific potentials of a new space radar program, using the existing facilities in Italy. The planetary radar technique is uniquely capable of investigating geometry and surface properties of various solar system objects, demonstrating advantages over the optical methods in its high spatial resolution and ability to obtain three-dimensional images. A single radar detection allows to obtain extremely accurate orbital elements, improving the instantaneous positional uncertainties by orders of magnitude with respect to an optically determined orbit. Radar is a powerful means to spatially resolve NEAs by measuring the distribution of the echo power in time delay (range) and Doppler frequency (line-of-sight velocity) with extreme precision in each coordinate, as it provides detailed information about the target physical properties like size, shape, rotation, near-surface bulk density and roughness and internal density distribution. The Medicina 32m antenna had been successfully used for the first time as the receiving part of a bistatic configuration during a test experiment (September 2001) held to check the capabilities of the entire data acquisition system. This test was possible thanks to the collaboration undertaken with the Evpatoria radar station, and consisted in the observation of the ETALON-1 low orbit satellite

Published
2002

8. Ground-based observations of 951 Gaspra: CCD lightcurves and spectrophotometry with the Galileo filters

Author

Mottola, Stefano, Dimartino, M, Gonano-Beurer, M, Hoffmann, H, and Neukum, G

Subjects
Astronomy
Abstract

This paper reports the observations of 951 Gaspra carried out at the European Southern Observatory (La Silla, Chile) during the 1991 apparition, using the DLR CCD Camera equipped with a spare set of the Galileo SSI filters. Time-resolved spectrophotometric measurements are presented. The occurrence of spectral variations with rotation suggests the presence of surface variegation.

Published
1992

9. A photometric survey of outer belt asteroids

Author

Dimartino, M, Gonano-Beurer, M, Mottola, Stefano, and Neukum, G

Subjects
Astronomy
Abstract

Since 1989, we have been conducting a research program devoted to the study of the Trojans and outer belt asteroids (Hilda and Cybele groups), in order to characterize their rotational properties and shapes. As an outcome of several observational campaigns, we determined rotational periods and lightcurve amplitudes for 23 distant asteroids, using both CCD and photoelectric photometry. In this paper, we compare the rotational properties of main belt asteroids and Trojans, based on the preliminary results of this survey.

Published
1992

36. Development and Fabrication of New Accelerator Grid Modules for Ion Sources in the 80 keV Neutral Beam Lines for DIII-D

Author

Grunloh, H.J., primary, Madruga, M.G., additional, Busath, J.L., additional, Callis, R.W., additional, Chiu, H.k., additional, DiMartino, M., additional, Hong, R.m., additional, Klasen, R., additional, Martin, W.C., additional, Moeller, C.P., additional, Streckert, H.H., additional, Tao, R., additional, and Trester, P.W., additional

Published
2005
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38. Physical model of near-Earth asteroid 6489 Golevka (1991 JX) from optical and infrared observations

Author

Mottola, S, Erikson, A, Harris, AW, Hahn, G, Neukum, G, Buie, MW, Sears, WD, Tholen, DJ, Whiteley, RJ, Magnusson, P, Piironen, J, Kwiatkowski, T, Borczyk, W, Howell, ES, Hicks, MD, Fevig, R, Krugly, YN, Velichko, FP, Chiorny, VG, Gaftonyuk, NM, DiMartino, M, Pravec, Mottola, S, Erikson, A, Harris, AW, Hahn, G, Neukum, G, Buie, MW, Sears, WD, Tholen, DJ, Whiteley, RJ, Magnusson, P, Piironen, J, Kwiatkowski, T, Borczyk, W, Howell, ES, Hicks, MD, Fevig, R, Krugly, YN, Velichko, FP, Chiorny, VG, Gaftonyuk, NM, DiMartino, M, and Pravec

Abstract

In 1995 asteroid 6489 Golevka (1991 JX) had a close encounter with the Earth at a distance of 0.034 AU, providing a good opportunity for a detailed study of a small Solar System object. In this paper we report the results of an extensive international obs, Addresses: Mottola S, DLR, INST PLANETARY EXPLORAT, D-12489 BERLIN, GERMANY. LOWELL OBSERV, FLAGSTAFF, AZ 86001. CALTECH, JET PROP LAB, PASADENA, CA 91109. UNIV HAWAII, INST ASTRON, HONOLULU, HI 96822. ASTRON OBSERV, S-75220 UPPSALA, SWEDEN. ADAM MICKIEWI

Published
1997

39. Photometric observations and modeling of asteroid 1620 Geographos

Author

Magnusson, P, Dahlgren, M, Barucci, MA, Jorda, L, Binzel, RP, Slivan, SM, Blanco, C, Riccioli, D, Buratti, BJ, Colas, F, Berthier, J, DeAngelis, G, DiMartino, M, Dotto, E, Drummond, JD, Fink, U, Hicks, M, Grundy, W, Wisniewski, W, Gaftonyuk, NM, Geyer, EH, Bauer, T, Hoffmann, M, Magnusson, P, Dahlgren, M, Barucci, MA, Jorda, L, Binzel, RP, Slivan, SM, Blanco, C, Riccioli, D, Buratti, BJ, Colas, F, Berthier, J, DeAngelis, G, DiMartino, M, Dotto, E, Drummond, JD, Fink, U, Hicks, M, Grundy, W, Wisniewski, W, Gaftonyuk, NM, Geyer, EH, Bauer, T, and Hoffmann, M

Abstract

Photometric observations of 1620 Geographos in 1993 and 1993 are presented and, in combination with previously published data, are used to derive models of Geographos, We estimate that the sidereal period of rotation is 0.21763860 +/- 0.00000003 days (5(h, Addresses: Magnusson P, ASTRON OBSERV, BOX 515, S-75120 UPPSALA, SWEDEN. OBSERV PARIS, F-92195 MEUDON, FRANCE. MIT, DEPT EARTH ATMOSPHER & PLANETARY SCI, CAMBRIDGE, MA 02139. UNIV CATANIA, IST ASTRON, I-95125 CATANIA, ITALY. CALTECH, JET PROP LAB, PASADEN

Published
1996

41. Physical studies of asteroids .30. The asteroid 153 Hilda

Author

Lagerkvist, CI, DiMartino, M, Blanco, C, Dahlgren, M, Erikson, A, Lahulla, JF, Lazzarin, M, Lumme, K, Pohjolainen, S, Riccioli, D, Lagerkvist, CI, DiMartino, M, Blanco, C, Dahlgren, M, Erikson, A, Lahulla, JF, Lazzarin, M, Lumme, K, Pohjolainen, S, and Riccioli, D

Abstract

The asteroid 153 Kilda was studied by photometric, spectroscopic and polarimetric observations during the apparition in 1992. The rotation period was determined to 5.11 hours with a lightcurve amplitude of 0.05 magnitudes. From our spectrum we find 153 Hi, Addresses: Lagerkvist CI, ASTRON OBSERV, BOX 515, S-75120 UPPSALA, SWEDEN. OSSERV ASTRON TORINO, I-10025 PINO TORINESE, ITALY. UNIV CATANIA, IST ASTRON, I-95125 CATANIA, ITALY. GERMAN AEROSP RES ESTAB, D-12489 BERLIN, GERMANY. ASTRON OBSERV, E-28014 MADRI

Published
1995

43. Ground-Based Photometry of Asteroid 951 Gaspra

Author

Wisniewski, W.Z., Barucci, M. Antonietta, Fulchignoni, Marcello, Desanctis, C., Dotto, Elisabetta, Rotundi, Alessandra, Binzel, Richard P., Madras, C.D., Green, Simon F., Kelly, M.L., Newman, P.J., Harris, Alan W., Young, J.W., Blanco, Carlo, Dimartino, M., Ferreri, W., Gonanobeurer, M., Mottola, Stefano, Tholen, David J., Goldader, J.D., Coradini, M., Magnusson, P., Wisniewski, W.Z., Barucci, M. Antonietta, Fulchignoni, Marcello, Desanctis, C., Dotto, Elisabetta, Rotundi, Alessandra, Binzel, Richard P., Madras, C.D., Green, Simon F., Kelly, M.L., Newman, P.J., Harris, Alan W., Young, J.W., Blanco, Carlo, Dimartino, M., Ferreri, W., Gonanobeurer, M., Mottola, Stefano, Tholen, David J., Goldader, J.D., Coradini, M., and Magnusson, P.

Published
1993

45. The EUNEASO Project: A European NEO Search, Follow-up, and Physical Observation Programme

Author

HAHN, G., primary, MOTTOLA, S., additional, ERIKSON, A., additional, HARRIS, A. W., additional, NEUKUM, G., additional, MAURY, A., additional, SAVALLE, R., additional, SCHOLL, H., additional, BIJAOUI, A., additional, DiMARTINO, M., additional, BARBIERI, C., additional, LAZZARIN, M., additional, MIGLIORINI, F., additional, PRAVEC, P., additional, WOLF, M., additional, SAROUNOVA, L., additional, VELICHKO, F. P., additional, KRUGLY, YU. N., additional, BELSKAYA, I. N., additional, and SHEVCHENKO, V. G., additional

Published
1997
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49. Reduction in Myocardial Ischemic/Reperfusion Injury and Neutrophil Accumulation After Therapeutic Administration of Streptokinase

Author

Smith, E. F., primary, Nichols, A. J., additional, Sellers, T. S., additional, OʼBrien, S. R., additional, Griswold, D. E., additional, Egan, J. W., additional, Hillegass, L. M., additional, Vasko, J. A., additional, Slivjak, M. J., additional, Davis, P. A., additional, Wolff, C. E., additional, and DiMartino, M. J., additional

Published
1991
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50. Continuous fabrication of high-temperature superconductor coated metal fiber and multifilamentary wire

Author

Woolf, L. D., primary, Raggio, W. A., additional, Elsner, F. E., additional, Fisher, M. V., additional, Stephens, R. B., additional, Figueroa, T. L., additional, Shearer, C. H., additional, Rose, J. D., additional, Schaubel, K. M., additional, Olstad, R. A., additional, Ohkawa, T., additional, Duggan, D. M., additional, DiMartino, M., additional, and Fagaly, R. L., additional

Published
1991
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