Results 81 to 90 of about 41,139 (300)

Orbital and spin variability of the Intermediate Polar BG CMi [PDF]

, 2005
Results of a CCD study of the variability of the cataclysmic variable BG CMi obtained at the Korean 1.8m telescope in 2002-2005 are presented. The "multi-comparison star" method had been applied for better accuracy estimates. The linear ephemeris based on 19 mean maxima for 2002--2005 is HJD 2453105.31448(6)+0.01057257716(198)(E-764707).
arxiv   +1 more source

Reconstructing Equatorial Electron Flux Measurements From Low‐Earth‐Orbit: A Conjunction Based Framework

Space Weather, Volume 23, Issue 3, March 2025.
Abstract We present an artificial neural network model that reconstructs >30 keV electron flux measurements near the geomagnetic equator from low‐Earth‐orbit (LEO) observations, exploiting the global coherent nature of the high‐energy trapped electrons that constitute the radiation belts.
D. L. Stumbaugh, J. Bortnik, S. G. Claudepierre   +2 more
wiley   +1 more source

Ephemeris of (507) Laodica [PDF]

Astronomische Nachrichten, 1907
n ...
openaire   +3 more sources

Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on GPS and BDS-3 PPP B2b Service

Remote Sensing
This study investigates and verifies the feasibility of the precise point positioning (PPP)-B2b enhanced real-time (RT) precise orbit determination (POD) of low Earth orbit (LEO) satellites.
Yali Shi, Tianhe Xu, Min Li, Kai Wei, Shuai Wang, Dixing Wang   +5 more
doaj   +1 more source

X-ray behaviour of Circinus X-1 - I: X-ray Dips as a diagnostic of periodic behaviour

, 2004
We examine the periodic nature of detailed structure (particularly dips) in the RXTE/ASM lightcurve of Circinus X-1. The significant phase wandering of the X-ray maxima suggests their identification with the response on a viscous timescale of the ...
Balucinska-Church, Boyle, Brandt, Brandt, Brown, Brown, Charles, Choudhuri, Choudhuri, Clark, Clarkson, Clarkson, Cumming, Eggleton, Fender, Fender, Feng, Frank, Frank, Glass, Goss, Hanuschik, Haynes, Haynes, Hughes, Iaria, Johnston, Kaluzienski, Konar, Krolik, Kuulkers, Leahy, Levine, Lubow, Margon, Marietta, Mignani, Mirabel, Moneti, N. Onyett, Negueruela, Negueruela, Okazaki, P. A. Charles, Parkinson, Petterson, Podsiadlowsk, Podsiadlowski, Romani, Scargle, Scargle, Schulz, Shirey, Shirey, Shirey, Stewart, Stewart, Taam, Tanaka, Tauris, Tauris, Tennant, Tennant, Tennant, van der Klis, van Teeseling, W. I. Clarkson, Warner, Whelan, Zahn   +69 more
core   +1 more source

Discovery of periodic dips in the light curve of GX 13+1: the X-ray orbital ephemeris of the source [PDF]

, 2013
The bright low-mass X-ray binary (LMXB) GX 13+1 is one of the most peculiar Galactic binary systems. A periodicity of 24.27 d with a formal statistical error of 0.03 d was observed in its power spectrum density obtained with RXTE All Sky Monitor (ASM ...
Burderi, L., D'Ai, A., Di Salvo, T., Iaria, R., Riggio, A., Robba, N. R.   +5 more
core   +2 more sources

Electron Density in Io's Alfvén Wing Observed Via Radio Occultation With Juno

Geophysical Research Letters, Volume 52, Issue 4, 28 February 2025.
Abstract Juno performed close flybys of the innermost Galilean moon, Io, in December 2023 (I57) and February 2024 (I58). During these flybys, the radio link connecting the Juno spacecraft to Earth observing stations of NASA's Deep Space Network (DSN) propagated through the Alfvén wing, a magnetospheric feature in which plasma is produced between Io and
D. R. Buccino, A. Caruso, D. Coffin, L. Gomez‐Casajus, M. Parisi, M. Zannoni, E. Gramigna, P. Withers, P. Tortora, R. S. Park, P. Steffes, S. Bolton   +11 more
wiley   +1 more source

Ephemeris of (518) Halawe [PDF]

Astronomische Nachrichten, 1907
n ...
openaire   +2 more sources

THE ASTROMETRIC RESULTS OF OBSERVATIONS OF PERIODICAL COMETS AT KT-50 TELESCOPE IN RI “MAO”

Odessa Astronomical Publications, 2017
The  astrometric  results  of  the observations  of  10  periodical  comets  in  2017  are presented.  The  observations  were  made  with  telescope KT-50  telescope  in  RI  «Mykolaiv  Astronomical Observatory».
A. V. Pomazan, N. V. Maigurova, O. V. Shulga   +2 more
doaj   +1 more source

Observations of Fast Local Loss of High‐Energy Ring Current Protons Associated With Deepening Local Minimum in Phase Space Density

Geophysical Research Letters, Volume 52, Issue 4, 28 February 2025.
Abstract The development of a deepening local minimum in phase space density (PSD)‐L∗ ${L}^{\ast }$ profile indicates fast local loss potentially caused by wave‐induced scattering. The identification and characterization of proton PSD deepening minima are important for investigating the ring current loss and overall dynamics.
Rui Chen, Hong Zhao, Sam Califf
wiley   +1 more source