Results 11 to 20 of about 10,252 (275)

Transit Timing Variations and linear ephemerides of confirmed Kepler transiting exoplanets [PDF]

Research in Astronomy and Astrophysics (2019) 19(3): 41 (6pp), 2018
We determined new linear ephemerides of transiting exoplanets using long-cadence de-trended data from quarters Q1 to Q17 of Kepler mission. We analysed TTV diagrams of 2098 extrasolar planets. The TTVs of 121 objects were excluded (because of insufficient data-points, the influence of stellar activity, etc).
Pavol Gajdoš, M. Vavnko, vStefan Parimucha   +2 more
arxiv   +3 more sources

Accurate and Rapid Broadcast Ephemerides for Beidou-Maneuvered Satellites

Remote Sensing, 2019
The geostationary earth orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites of the Beidou navigation satellite system are maneuvered frequently. The broadcast ephemeris can be interrupted for several hours after the maneuver.
Jing Qiao, Wu Chen, Shengyue Ji, Duojie Weng   +3 more
doaj   +2 more sources

Tests of GR with INPOP15a planetary ephemerides: estimations of possible supplementary advances of perihelia for Mercury and Saturn [PDF]

arXiv, 2016
Planetary ephemerides are a good tool for studying general relativity at the scale of our solar system. We present here new evaluations of advances of perihelia for Mercury and Saturn.
A. Fienga, Jacques Laskar, H. Manche, M. Gastineau   +3 more
arxiv   +3 more sources

INPOP17a planetary ephemerides [PDF]

, 2017
Based on the use of Cassini radio tracking data and the introduction of LLR data obtained at 1064 nm, a new planetary ephemerides INPOP17a was built including improvements for the planet orbits as well as for Moon ephemerides. Besides new asteroid masses, new parameters related to the inner structure of the Moon were obtained and presented here ...
Fienga, A., Deram, P., Viswanathan, V., Di Ruscio, A., Bernus, L., Durante, D., Gastineau, M., Laskar, J.   +7 more
openaire   +4 more sources

ASSESSING EFFICIENCY OF GPS EPHEMERIDES IN DIFFERENT REGION USING PRECISE POINT POSITIONING [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
Precise Point Positioning (PPP) is a technique that process Global Positioning System (GPS) observation that can achieve sub-decimetre accuracy. Precise ephemerides that contain satellite clock and position plays a vital role in minimising orbital and ...
H. S. Lee, W. A. Wan Aris, T. A. Musa, A. Ahmad   +3 more
doaj   +1 more source

Combining astrometry and JUICE-Europa Clipper radio science to improve the ephemerides of the Galilean moons [PDF]

Astronomy & Astrophysics, 2023
The upcoming JUICE and Europa Clipper missions to Jupiter's Galilean satellites will provide radio science tracking measurements of both spacecraft. Such data are expected to significantly help estimating the moons' ephemerides and related dynamical ...
M. Fayolle, A. Magnanini, V. Lainey, D. Dirkx, M. Zannoni, P. Tortora   +5 more
semanticscholar   +1 more source

Newly found Mayan records of astronomical phenomena in Dresden Codex [PDF]

Serbian Astronomical Journal, 2023
The rich culture of old Maya gave birth to a very complicated and complex calendar; they also recorded important historical events and many significant astronomical phenomena.
Vondrák J., Böhm V., Böhm B.
doaj   +1 more source

ExoClock Project. II. A Large-scale Integrated Study with 180 Updated Exoplanet Ephemerides [PDF]

Astrophysical Journal Supplement Series, 2021
The ExoClock project is an inclusive, integrated, and interactive platform that was developed to monitor the ephemerides of the Ariel targets to increase the mission efficiency.
A. Kokori, A. Tsiaras, B. Edwards, M. Rocchetto, G. Tinetti, L. Bewersdorff, Y. Jongen, G. Lekkas, G. Pantelidou, E. Poultourtzidis, A. Wunsche, C. Aggelis, V. Agnihotri, C. Arena, M. Bachschmidt, D. Bennett, P. Benni, K. Bernacki, E. Besson, L. Betti, A. Biagini, P. Brandebourg, M. Bretton, S. Brincat, M. Cal'o, F. Campos, R. Casali, R. Ciantini, M. Crow, B. Dauchet, S. Dawes, M. Deldem, D. Deligeorgopoulos, R. Dymock, T. Eenmae, P. Evans, N. Esseiva, C. Falco, S. Ferratfiat, M. Fowler, S. Futcher, J. Gaitan, F. G. Horta, P. Guerra, F. Hurter, A. Jones, W. Kang, H. Kiiskinen, T. Kim, D. Laloum, R. Lee, F. Lomoz, C. Lopresti, M. Mallonn, M. Mannucci, A. Marino, J.-C. Mario, J. Marquette, J. Michelet, M. Miller, T. Mollier, D. Molina, N. Montigiani, F. Mortari, M. Morvan, L. Mugnai, L. Naponiello, A. Nastasi, R. Neito, E. Pace, P. Papadeas, N. Paschalis, C. Pereira, V. Perroud, M. Phillips, P. Pintr, J.-B. Pioppa, A. Popowicz, M. Raetz, F. Regembal, K. Rickard, M. Roberts, L. Rousselot, X. Rubia, J. Savage, D. Sedita, D. Shave-Wall, Nikos Sioulas, V. vSkoln'ik, M. Smith, D. St-Gelais, D. Stouraitis, I. Strikis, G. Thurston, A. Tomacelli, A. Tomatis, B. Trevan, P. Valeau, J. Vignes, K. Vora, M. Vravsvt'ak, F. Walter, B. Wenzel, D. Wright, M. Z'ibar   +104 more
semanticscholar   +1 more source

Implementation of the variation of the luni-solar acceleration into GLONASS orbit calculus [PDF]

Geodetski Vestnik, 2021
In the differential equation system describes the motion of GLONASS satellites (rus. Globalnaya Navigazionnaya Sputnikovaya Sistema, or Global Navigation Satellite System ), the acceleration caused by the luni-solar traction is often taken as a constant ...
Sid Ahmed Medjahed, Abdelhalim Niati, Noureddine Kheloufi, Habib Taibi   +3 more
doaj   +1 more source

Did old Maya observe Mercury? [PDF]

Serbian Astronomical Journal, 2022
It is well known that the rich culture of old Maya contained, among other, also a very complicated and complex calendar, in which they recorded not only historical events, but also significant astronomical phenomena.
Vondrák J., Böhm V., Böhm B.
doaj   +1 more source