Results 41 to 50 of about 43,155 (284)

Non-detection of previously reported transits of HD 97658b with MOST photometry [PDF]

, 2012
The radial velocity-discovered exoplanet HD 97658b was recently announced to transit, with a derived planetary radius of 2.93 \pm 0.28 R_{Earth}. As a transiting super-Earth orbiting a bright star, this planet would make an attractive candidate for ...
Antoci, Victoria, Dragomir, Diana, Guenther, David B., Henry, Gregory W., Howard, Andrew W., Johnson, John A., Kuschnig, Rainer, Marcy, Geoffrey W., Matthews, Jaymie M., Moffat, Anthony F. J., Rowe, Jason F., Rucinski, Slavek M., Sasselov, Dimitar, Weiss, Werner W.   +13 more
core   +3 more sources

Observations of the Rigollet Comet from Korea and Japan [PDF]

Journal of Astronomy and Space Sciences, 2014
Since Rigollet first discovered a comet in 1939, many follow-up observations have been made, particularly in Europe. It is now known that the Rigollet comet is identical with the one observed by Herschel in 1788, and thus it is now called 35P/1939 O1 ...
Ki-Won Lee, Byeong-Hee Mihn, Young Sook Ahn, Bong-Gyu Kim   +3 more
doaj   +1 more source

Constraining the Mass of the Graviton with the Planetary Ephemeris INPOP. [PDF]

Physical Review Letters, 2019
We use the planetary ephemeris INPOP17b to constrain the existence of a Yukawa suppression to the Newtonian potential, generically associated with the graviton's mass.
L. Bernus, O. Minazzoli, A. Fienga, M. Gastineau, J. Laskar, P. Deram   +5 more
semanticscholar   +1 more source

Bartolomeu Lourenço de Gusmão: o primeiro cientista brasileiro

Revista Brasileira de Ensino de Física
Bartolomeu Lourenço de Gusmão foi o primeiro inventor e cientista brasileiro, célebre pela criação do balão a ar quente em 1709. Nos 300 anos de sua mais famosa invenção, este artigo apresenta uma nova biografia do fundador da Aerostática e um estudo ...
Rodrigo Moura Visoni, João Batista Garcia Canalle   +1 more
doaj   +1 more source

Galileo Broadcast Ephemeris and Clock Errors Analysis: 1 January 2017 to 31 July 2020

Italian National Conference on Sensors, 2020
A preliminary analysis of Galileo F/NAV broadcast Clock and Ephemeris is performed in this paper with 43 months of data. Using consolidated Galileo Receiver Independent Exchange (RINEX) navigation files, automated navigation data monitoring is applied ...
M. T. Alonso, J. Sanz, J. Juan, A. Rovira‐Garcia, G. González‐Casado   +4 more
semanticscholar   +1 more source

PERHITUNGAN DATA EPHEMERIS KOORDINAT MATAHARI MENGGUNAKAN ALGORITMA JEAN MEEUS HIGHER ACCURACY DAN KETERKAITANNYA DENGAN PENGEMBANGAN ILMU FALAK

Jurnal Ilmiah Islam Futura, 2017
Data of solar coordinate such as longitude and latitude of the ecliptic, declination, and right ascension are the data that are often involved in astronomical reckoning and practical islamic astronomy.
reza akbar
doaj   +1 more source

An influence of the covariance between single orbit parameters on the accuracy of observations of the pseudo-ranges and phase differences

Metrology and Measurement Systems, 2020
The possibilities to improve values of the satellite orbit elements by employing the pseudo-ranges and differences of carrier phase frequencies measured at many reference GPS stations are analysed. An improvement of orbit ephemeris is achieved by solving
Skeivalas Jonas, Paršeliūnas Eimuntas, Putrimas Raimundas, Šlikas Dominykas   +3 more
doaj   +1 more source

Ephemeris Errors and the Gravitational-wave Signal: Harmonic Mode Coupling in Pulsar Timing Array Searches [PDF]

Astrophysical Journal, 2019
Any unambiguous detection of a stochastic gravitational wave background (GWB) by a pulsar timing array will rest on the measurement of a characteristic angular correlation between pulsars.
E. Roebber
semanticscholar   +1 more source

Spitzer Observations of GX17+2: Confirmation of a Periodic Synchrotron Source [PDF]

, 2011
GX17+2 is a low-mass X-ray binary (LMXB) that is also a member of a small family of LMXBs known as "Z-sources" that are believed to have persistent X-ray luminosities that are very close to the Eddington limit. GX17+2 is highly variable at both radio and
Bornak, Jillian, Gelino, Christopher R., Gelino, Dawn M., Harrison, Thomas E., McNamara, Bernard J., Rupen, Michael P., Wachter, Stefanie   +6 more
core   +1 more source

Performance Assessment of Non-Integer-Hour Data Blocks in BDS Broadcast Ephemeris

IEEE Access
Due to system anomalies, BeiDou navigation satellite system (BDS) sometimes updates the broadcast ephemeris at non-integral hours. The gross errors contained in the non-integer-hour data blocks of broadcast ephemeris will lead to the signal-in-space (SIS)
Jingjing Wang, Chao Zhou
doaj   +1 more source