Results 11 to 20 of about 1,344 (291)

Retrieval of the Stratospheric Density by the Star Occultation

Aerospace, 2023
The navigation by the stellar refraction is important for a LEO (Low-Earth-Orbit) satellite, especially in a GNSS (Global Navigation Satellite System)-denied environment, since it is totally autonomous.
Kedong Wang, Zhennan Li, Shaoxiong Zhang
doaj   +1 more source

The Upper Atmosphere of Uranus from Stellar Occultations. I. Methods and Validation

The Planetary Science Journal, 2023
Measurements made by the Voyager 2 spacecraft during its flybys of Uranus in 1986 found warm stratospheric and hot thermospheric temperatures that cannot be explained by solar energy alone.
William R. Saunders, Michael J. Person, Paul Withers, Richard G. French, Chanita Tubthong   +4 more
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Fluctuations of the Earth’s Rotation by Stellar Occultations [PDF]

Symposium - International Astronomical Union, 1990
Observations of lunar occultations made between 1800 and 1955 are analyzed in order to determine the fluctuations of the Earth's rotation before the International Atomic Time was established. The reduction is made on the basis of the DE200/LE200 ephemeris and the FK5 system.
C. Jordi, G. Rossello
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Detecting Interstellar Objects through Stellar Occultations [PDF]

The Astrophysical Journal Letters, 2020
Abstract Stellar occultations have been used to search for Kuiper Belt and Oort Cloud objects. We propose a search for interstellar objects based on the characteristic durations (∼0.1 s) of their stellar occultation signals and high inclination relative to the ecliptic plane.
Amir Siraj, Abraham Loeb
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The Structure of Chariklo’s Rings from Stellar Occultations [PDF]

The Astronomical Journal, 2017
Abstract Two narrow and dense rings (called C1R and C2R) were discovered around the Centaur object (10199) Chariklo during a stellar occultation observed on 2013 June 3. Following this discovery, we planned observations of several occultations by Chariklo’s system in order to better characterize the physical properties of the ring and ...
Bérard, D., Sicardy, B., Camargo, J. I. B., Desmars, Josselin, Braga-Ribas, F., Ortiz, J.-L., Duffard, R., Morales, N., Meza, E., Leiva, R., Benedetti-Rossi, G., Vieira-Martins, R., Gomes Júnior, A.-R., Assafin, M., Colas, F., Dauvergne, J.-L., Kervella, P., Lecacheux, J., Maquet, L., Vachier, F., Renner, S., Monard, B., Sickafoose, A. A., Breytenbach, H., Genade, A., Beisker, W., Bath, K.-L., Bode, H.-J., Backes, M., Ivanov, V. D., Jehin, Emmanuel, Gillon, Michaël, Manfroid, Jean, Pollock, J., Tancredi, G., Roland, S., Salvo, R., Vanzi, L., Herald, D., Gault, D., Kerr, S., Pavlov, H., Hill, K. M., Bradshaw, J., Barry, M. A., Cool, A., Lade, B., Cole, A., Broughton, J., Newman, J., Horvat, R., Maybour, D., Giles, D., Davis, L., Paton, R. A., Loader, B., Pennell, A., Jaquiery, P.-D., Brillant, S., Selman, F., Dumas, C., Herrera, C., Carraro, G., Monaco, L., Maury, A., Peyrot, A., Teng-Chuen-Yu, J.-P., Richichi, A., Irawati, P., De Witt, C., Schoenau, P., Prager, R., Colazo, C., Melia, R., Spagnotto, J., Blain, A., Alonso, S., Román, A., Santos-Sanz, P., Rizos, J.-L., Maestre, J.-L., Dunham, D.   +81 more
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The Sizes and Albedos of Centaurs 2014 YY49 and 2013 NL24 from Stellar Occultation Measurements by RECON

The Planetary Science Journal, 2021
In 2019, the Research and Education Collaborative Occultation Network (RECON) obtained multiple-chord occultation measurements of two Centaur objects: 2014 YY _49 on 2019 January 28 and 2013 NL _24 on 2019 September 4.
Ryder H. Strauss, Rodrigo Leiva, John M. Keller, Elizabeth Wilde, Marc W. Buie, Robert J. Weryk, JJ Kavelaars, Terry Bridges, Lawrence H. Wasserman, David E. Trilling, Deanna Ainsworth, Seth Anthony, Robert Baker, Jerry Bardecker, James K Bean Jr., Stephen Bock, Stefani Chase, Bryan Dean, Chessa Frei, Tony George, Harnoorat Gill, H. Wm. Gimple, Rima Givot, Samuel E. Hopfe, Juan M. Cota Jr., Matthew Kehrli, Rebekah King, Sean L. Haley, Charisma Lara, Nels Lund, Martin L. Mattes, Keitha McCandless, Delsie McCrystal, Josh McRae, Leonardo Emmanuel Rodriguez Melgarejo, Paola Mendoza, Alexandra Miller, Ian R. Norfolk, Bruce Palmquist, Robert D. Reaves, Megan L Rivard, Michael von Schalscha, Ramsey Schar, Timothy J Stoffel, Diana J. Swanson, Doug Thompson, J. A. Wise, Levi Woods, Yuehai Yang   +48 more
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Photographic Observation of Stellar Occultations [PDF]

International Astronomical Union Colloquium, 1988
Stellar occultations are usually observed visually, but this can also be done photographically. Our method has some advantages: –the obtained moments of contacts refer to the smoothed lunar limb,–the error in the determination of contacts is calculable,–the error may be less than in visual work,–the reduction of photographs is fast, due to the ...
A. Tomić, N. Čabrić, V. Čelebonović
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The multichord stellar occultation by the centaur Bienor on January 11, 2019 [PDF]

, 2023
Within our program of physical characterization of trans-Neptunian objects and centaurs, we predicted a stellar occultation by the centaur (54598) Bienor to occur on January 11, 2019, with good observability potential.
Beisker, W., Pal, A., Trigo-Rodríguez, Josep M., Selva, A, M. Bretton, Perelló, C., J. Lecacheux, Organero, F., W. Beisker, Gomes-Júnior, A, R, Ana, L., Castro-Tirado, A.J., Sicardy, B., Pereira, C. L., Vieira-Martins, R., A. Laporta, Morgado, B., M. Kretlow, Colas, F., Castro-Tirado, A. J., Lamadrid, J.L., J. L. Ortiz, Gonçalves, R., Camargo, J. I.B., Santos-Sanz, P., C. L. Pereira, Assafin, M., Ortiz, J. L., A. Román, Bretton, M., Desmars, J., A. J. Castro-Tirado, Maestre, J. L., B. Morgado, Garcés, Gerardo, Lamadrid, J, L, N. Morales, F. Colas, A. Pal, Braga-Ribas, F., B. Sicardy, F. Braga-Ribas, Camargo, J, I B, A. Selva, Trigo-Rodriguez, J. M., Alonso, S., Gomes-Júnior, A. R. [UNESP], D. Souami, J. Desmars, M. Ferreira, M. Vara-Lubiano, Rommel, F, L, R. Gonçalves, V. Casanova, L. Escaned, Selva, A., J. L. Lamadrid, Benedetti-Rossi, G., Fernández-Valenzuela, E., F. L. Rommel, Maestre, J, L, Benedetti-Rossi, G. [UNESP], M. Garcés, Ferreira, M., Gomes-Junior, A. R., J. I. B. Camargo, Garcés, M., R. Iglesias-Marzoa, Camargo, J.I.B., Hellmich, S., Pereira, C, L, G. Benedetti-Rossi, S. Hellmich, Laporta, A., P. Santos-Sanz, A. R. Gomes-Júnior, E. Fernández-Valenzuela, Iglesias-Marzoa, R., Trigo-Rodriguez, J, M, A. Alvarez-Candal, Castro-Tirado, A, J, Alvarez-Candal, A., Duffard, R., S. Alonso, Lamadrid, J. L., S. Mottola, R. Vieira-Martins, L. Ana, J. M. Trigo-Rodriguez, Morales, N., F. Organero, Fonseca, F., Ortiz, J, L, Bretton, M, Lecacheux, J., Colas, F. [UNESP], Mottola, S., Casanova, V., R. Duffard, J. L. Maestre, Escaned, L., M. Assafin, Román, A., F. Fonseca, Vara-Lubiano, M., C. Perelló, Kretlow, M., Souami, D., Rommel, F. L.   +108 more
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A ring system detected around the Centaur (10199) Chariklo [PDF]

, 2014
Hitherto, rings have been found exclusively around the four giant planets in the Solar System1. Rings are natural laboratories in which to study dynamical processes analogous to those that take place during the formation of planetary systems and galaxies.
Vanzi, L., Frank, N.R., Spagnotto, Julio, H. Monteiro, Harpsøe, Kennet Bomann West, J. Lecacheux, M. Emilio, Braga-Ribas, Felipe, F. Roques, M. Gillon, E. Jehin, Vanzi, Leonardo, Machado, D. I., Roques, Françoise, Lellouch, Emmanuel, Vachier, Frédéric, R. Sfair, Almenares, L., Colazo, C., Colas, F., D. G. Lambas, Jørgensen, U., Jehin, E., Lemos, Pablo, J. L. Ortiz, J. B. Haislip, J. P. Moore, Gil Hutton, Ricardo Alfredo, Wang, X.-b., Gil-Hutton, Ricardo, Ivarsen, Kevin, Opitom, C., R. Melia, Ortiz, J. L., Moore, J., A. Ceretta, Harpsoe, K., Schneiter, E. M., Lambas, Diego García, Lacluyze, A.P., Braga-Ribas, F., Lorenzini, L., Schneiter, E.M., B. Sicardy, Gu, S.-h., L. Almenares, Melia, R., L. Maquet, Reichart, Daniel E., LaCluyze, A. P., Haislip, J. B., Ivarsen, K. M., L. Vanzi, Benedetti-Rossi, G., R. G. Sandness, Haislip, J.B., Garcia Lambas, Diego Rodolfo, G. Tancredi, Perez, V., J. Spagnotto, Sicardy, Bruno, Wang, Xiaobin, Martinez, N., Colas, François, P. Kervella, P. Lemos, Benedetti-Rossi, Gustavo, C. Colazo, Gil-Hutton, R., LaCluyze, A., Tancredi, G., Frank, N. R., Gu, S. -H., Snodgrass, Colin, Maury, A., Gillon, Michaël, Gomes, A. Ramos, Manfroid, Jean, MacHado, D.I., Gomes Jr., A., F. Char, Widemann, Thomas, Ceretta, Alberto, Maury, A. J., M. Dominik, Schneiter, E., Tancredi, Gonzalo, Char, F., Opitom, Cyrielle, Gillon, M., Brage-Ribas, F., Roland, S., Lacluyze, Aaron P., Moutamid, M. El, Lambas, D., Roques, F., Ceretta, A., Manfroid, J., Ligier, N., Lecacheux, J., V. Perez, Monteiro, H., Lambas, D. G., S. Roland, U. G. Jørgensen, El Moutamid, Maryame, Harpsøe, Kennet, Machado, D., J. Pollock, Leiva, R., R. Gil-Hutton, Colazo, Carlos, Benedetti Rossi, G., Mehret, Leandro Cesar, Braga Ribas, F., Frank, Nathan R., El Moutamid, M., Assafin, Marcelo, A. Ramos Gomes, Emilio, M., Gu, S., Jorgensen, U. G., Gu, Shenghong, N. Ligier, M. Rabus, Camargo, Julio, L. Lorenzini, Rabus, Markus, Skottfelt, Jesper Mirsa, Camargo, J. I. B., Sicardy, B., Skottfelt, J., Vieira-Martins, R., Lemos, P., Moore, Justin, Char, Farid, Moore, J.P., Rabus, M., Roig, F., Ivarsen, K., Vachier, F., Sandness, R. G., Wang, X. -B., Camargo, J., K. M. Ivarsen, Haislip, Joshua, Skottfelt, Jesper, Assafin, M., Lellouch, E., Vierira-Martins, R., Sandness, R.G., Vieira Martins, R., Ivarsen, K.M., Reichart, D.E., D. I. Machado, Gomes, A. R., J. Manfroid, Camargo, J., I B, Sfair, R. [UNESP], E. Lellouch, Frank, N., N. Morales, Reichart, D., F. Colas, Ortiz, J.L., X.-b. Wang, C. Opitom, S.-h. Gu, F. Braga-Ribas, Emilio, Marcelo, N. R. Frank, K. Harpsøe, Roland, Santiago, Vieira-Martins, Roberto, J. Skottfelt, Harpsøe, K., Jorgensen, U., N. Martinez, Moore, J. P., Ligier, Nicolas, J. I. B. Camargo, Pollock, J., Camargo, J.I.B., Reichart, D. E., Melia, Raul Roberto, Lecacheux, Jean, Jørgensen, Uffe Gråe, C. Snodgrass, Jørgensen, U.G., G. Benedetti-Rossi, Haislip, J., M. El Moutamid, Camargo, J.,, Sfair, R., Maquet, L., Sfair, Rafael, Mehret, L., Duffard, R., Jørgensen, U. G., Dominik, M., Duffard, R,, Kervella, Patrick, Dominik, Martin, R. Vieira-Martins, Snodgrass, C., Spagnotto, J., Widemann, T., Duffard, René, A. P. LaCluyze, Pollock, Joseph, E. M. Schneiter, Maquet, Lucie, Sandness, R., Morales, N., Kervella, P., Wang, X., L. Mehret, A. Maury, Ramos Gomes, A., F. Vachier, Jehin, Emmanuel, T. Widemann, R. Duffard, Schneiter, E. Matías, F. Roig, R. Leiva, M. Assafin, Ortiz, J., D. E. Reichart   +228 more
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An exploration of Pluto’s environment through stellar occultations [PDF]

Astronomy & Astrophysics, 2014
Context. Pluto has five known satellites with diameters ranging from ~1200 km down to ~40 km, a possible outcome of a collisional origin. Smaller objects probably exist and may maintain tenuous rings, thus representing hazards during the New Horizons flyby of July 2015. Aims. The goal is to provide an upper limit for the numbers of unseen small bodies
Boissel, Y., Sicardy, B., Roques, F., Gaulme, P., Doressoundiram, A., Widemann, T., Ivanov, V.D., Marco, O., Mason, E., Ageorges, N., Mousis, O., Rousselot, P., Dhillon, V. S., Littlefair, S. P., Marsh, T. R., Assafin, M., Ribas, F. Braga, Neto, D. da Silva, Camargo, J.I.B., Andrei, A., Martins, R. Vieira, Behrend, R., Kretlow, M.   +22 more
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