Results 71 to 80 of about 32,900 (194)

Signature of the presence of a third body orbiting around XB 1916-053 [PDF]

, 2015
The ultra-compact dipping source \object{XB 1916-053} has an orbital period of close to 50 min and a companion star with a very low mass (less than 0.1 M$_{\odot}$). The orbital period derivative of the source was estimated to be $1.5(3) \times 10^{-11}$
Burderi, L., Del Santo, M., Di Salvo, T., Galiano, C. G., Gambino, A. F., Iaria, R., Matranga, M., Pintore, F., Riggio, A., Romano, P., Sanna, A., Scarano, F.   +11 more
core   +2 more sources

Identifying MESSENGER Magnetospheric Boundary Crossings Using a Random Forest Region Classifier

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract We present a new list of bow shock and magnetopause crossings based on automated region classification for the MESSENGER (Mercury Surface, Space Environment, Geochemistry and Ranging) mission. We fit a random forest model to magnetometer and ephemeris data to classify the solar wind, magnetosheath, and magnetosphere regions surrounding Mercury.
Daragh M. Hollman, Caitríona M. Jackman, Katarina Domijan, Charles F. Bowers, Simon J. Walker, Matthew J. Rutala, Alexandra R. Fogg   +6 more
wiley   +1 more source

A Low Earth Orbit Satellite-Orbit Extrapolation Method Based on Multi-Satellite Ephemeris Coordination and Multi-Stream Fractional Autoregressive Integrated Moving Average

Aerospace
The low Earth orbit (LEO) satellite internet network (LEO-SIN) has become a heated issue for the next generation of mobile communications, serving as a crucial means to achieve global wide-area broadband coverage and, especially, mobile phone directly to
Wenliang Lin, Jian Yi, Tong Wang, Ke Wang, Zexi Huang, Zhongliang Deng, Yang Liu, Yicheng Liao, Heng Kang, Zeyang Liu, Junyu Zhang   +10 more
doaj   +1 more source

An Experiment on Radio Location of Objects in the Near-Earth Space with VLBI in 2012

Open Astronomy, 2013
An experiment on radar location of space debris objects using of the method of VLBI was carried out in April, 2012. The radar VLBI experiment consisted in irradiation of some space debris objects (4 rocket stages and 5 inactive satellites) with a signal ...
Nechaeva M., Antipenko A., Bezrukovs V., Bezrukov D., Dementjev A., Dugin N., Konovalenko A., Kulishenko V., Liu X., Nabatov A., Nesteruk V., Pupillo G., Reznichenko A., Salerno E., Shmeld I., Shulga O., Sybiryakova Y., Tikhomirov Yu., Tkachenko A., Volvach A., Yang W.-J.   +20 more
doaj   +1 more source

Reconstructing Magnetotail Reconnection Events Using Data Mining is Feasible and Repeatable

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract Recently, Stephens et al. (2023), https://doi.org/10.1029/2022ja031066 utilized a data mining (DM) algorithm, applied to 26 years of magnetospheric magnetometer observations coupled with a flexible formulation of the magnetospheric magnetic field, to reconstruct the global configuration of the magnetotail when the Magnetospheric MultiScale ...
G. K. Stephens, R. S. Weigel, M. I. Sitnov, N. A. Tsyganenko   +3 more
wiley   +1 more source

First Results of the VLBI Experiment on Radar Location of the Asteroid 2012 DA14

Open Astronomy, 2013
An international VLBI experiment on radio location of the asteroid 2012 DA14 was organized on 2013 February 15–16, during its flyby close to Earth. The purpose of observations was to investigate and specify orbital parameters of the asteroid, as well as ...
Nechaeva M., Antipenko A., Bezrukov D., Bezrukovs Vl., Dementjev A., Dugin N., Jekabsons N., Khutornoy R., Klapers M., Konovalenko A., Kulishenko V., Nabatov A., Nesteruk V., Pupillo G., Reznichenko A., Salerno E., Shmeld I., Skirmante K., Tikhomirov Yu., Voytyuk V.   +19 more
doaj   +1 more source

Timing accuracy of the Swift X-Ray Telescope in WT mode

, 2012
The X-Ray Telescope (XRT) on board Swift was mainly designed to provide detailed position, timing and spectroscopic information on Gamma-Ray Burst (GRB) afterglows.
Beardmore, A. P., Burrows, D. N., Campana, S., Capalbi, M., Cusumano, G., Kennea, J. A., La Parola, V., Osborne, J. P., Perri, M., Sbarufatti, B., Tagliaferri, G.   +10 more
core   +1 more source

The Fettered and the Flea: A New Poem by Edmund Waller☆

Renaissance Studies, Volume 40, Issue 1, Page 41-54, February 2026.
Abstract This contribution explores for the first time a 22‐line poem in a British Library manuscript, ‘To a young lady that kept a flea chay’nd in a box’, which can be convincingly ascribed to Edmund Waller. Its most famous relative is Donne’s ‘The Flea’, but its ancestry differs.
Stuart Gillespie
wiley   +1 more source

LANDSAT D position determination and correction study [PDF]

An assessment of accuracy of the knowledge of LANDSAT D spacecraft ephemeris data, an evaluation of the impact of expected attitude and alignment accuracies and analysis of the various options for the combining of precision ephemeris and attitude data ...

core   +1 more source

Astrometric positions for 18 irregular satellites of giant planets from 23 years of observations

, 2015
The irregular satellites of the giant planets are believed to have been captured during the evolution of the solar system. Knowing their physical parameters, such as size, density, and albedo is important for constraining where they came from and how ...
Andrei, A. H., Arlot, J. -E., Assafin, M., Benedetti-Rossi, G., Braga-Ribas, F., Camargo, J. I. B., Desmars, J., Dias-Oliveira, A., Duchemin, Y., Gomes-Júnior, A. R., Lainey, V., Morgado, B. E., Neto, D. N. da Silva, Thuillot, W., Vieira-Martins, R.   +14 more
core   +3 more sources