Results 1 to 10 of about 34,334 (197)

Stingray Sensor System for Persistent Survey of the GEO Belt [PDF]

Sensors
The Stingray sensor system is a 15-camera optical array dedicated to the nightly astrometric and photometric survey of the geosynchronous Earth orbit (GEO) belt visible above Tucson, Arizona.
Tanner Campbell, Adam Battle, Dan Gray, Om Chabra, Scott Tucker, Vishnu Reddy, Roberto Furfaro   +6 more
doaj   +2 more sources

Checking the possibility of determining the relative orbits of stars rotating around the center body of the Galaxy

Open Astronomy, 2022
The results of observations of selected stars orbiting the central body of our Galaxy, which, according to the latest data, has a mass of about 4 million of solar mass, are considered.
Shakht Natalia A., Izmailov Igor S., Gorshanov Denis L.   +2 more
doaj   +1 more source

The Science of Fundamental Catalogs

Frontiers in Astronomy and Space Sciences, 2021
This review paper discusses the science of astrometric catalogs, their current applications and future prospects for making progress in fundamental astronomy, astrophysics and gravitational physics.
Sergei M. Kopeikin, Valeri V. Makarov
doaj   +1 more source

Precise Distance Measurement for a Near-Earth Asteroid by the Refined Rotational Reflex Velocity Method

The Astronomical Journal, 2023
The rotational reflex velocity (RRV) method was proposed by Heinze and Metchev in 2015 and was used to measure the distances of main-belt asteroids (MBAs). Later, Lin et al. generalized this method using spherical astronomy in 2016.
B. F. Guo, Q. Y. Peng, F. R. Lin, J. L. Cao   +3 more
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SQUAB—I: The First Release of Strange QUasar Candidates With ABnormal Astrometric Characteristics From Gaia EDR3 and SDSS

Frontiers in Astronomy and Space Sciences, 2022
Given their extremely large distances and small apparent sizes, quasars are generally considered as objects with near-zero parallax and proper motion.
Qi-Qi Wu, Qi-Qi Wu, Shi-Long Liao, Shi-Long Liao, Xiang Ji, Xiang Ji, Zhao-Xiang Qi, Zhao-Xiang Qi, Zhen-Ya Zheng, Zhen-Ya Zheng, Ru-Qiu Lin, Ru-Qiu Lin, Ying-Kang Zhang, Ying-Kang Zhang, Tao An, Tao An   +15 more
doaj   +1 more source

Applications of the Source-Frequency Phase-Referencing Technique for ngEHT Observations

Galaxies, 2022
The source-frequency phase-referencing (SFPR) technique has been demonstrated to have great advantages for mm-VLBI observations. By implementing simultaneous multi-frequency receiving systems on the next-generation Event Horizon Telescope (ngEHT ...
Wu Jiang, Guang-Yao Zhao, Zhi-Qiang Shen, María J. Rioja, Richard Dodson, Ilje Cho, Shan-Shan Zhao, Marshall Eubanks, Ru-Sen Lu   +8 more
doaj   +1 more source

Astrometry test of MSCRED IRAF software package [PDF]

Serbian Astronomical Journal, 2005
Astrometric properties of images obtained using MSCRED IRAF software package are investigated. CCD observations of M35 open cluster were taken in an observation run between October 10 and 17, 2004 at Belogradchick Observatory (Bulgaria) using the 60cm ...
Popescu R., Popescu P., Paraschiv P., Nedelcu A.   +3 more
doaj   +1 more source

Orientations of orbital planes of binaries [PDF]

Serbian Astronomical Journal, 2004
Orientations of orbital planes of binaries are analyzed by using a complete sample of known orbital systems. The use of a so large sample is possible due to the application of a new procedure enabling to include the binaries for which the ascending nodes
Popović Georgije M., Pavlović Rade M., Ninković Slobodan D.   +2 more
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A Novel Deep Learning-Based Relabeling Architecture for Space Objects Detection from Partially Annotated Astronomical Images

Aerospace, 2022
Space Surveillance and Tracking is a task that requires the development of systems that can accurately discriminate between natural and man-made objects that orbit around Earth.
Florin Dumitrescu, Bogdan Ceachi, Ciprian-Octavian Truică, Mihai Trăscău, Adina Magda Florea   +4 more
doaj   +1 more source

SST Anywhere—A Portable Solution for Wide Field Low Earth Orbit Surveillance

Remote Sensing, 2022
The low-Earth orbit (LEO) is filled with active satellites, but also with space debris, which need constant observation. The orbiting objects may be affected by collisions or by atmospheric drag, and therefore they can change their orbit or even fall to ...
Radu Gabriel Danescu, Razvan Itu, Mircea Paul Muresan, Ana Rednic, Vlad Turcu   +4 more
doaj   +1 more source