Results 1 to 10 of about 44,112 (114)

Orbit Prediction using Broadcast Ephemeris for GLONASS Satellite Visibility Analysis [PDF]

Journal of Astronomy and Space Sciences, 2009
Even though there are several Global Navigation Satellite Systems under development, only GPS and GLONASS are currently available for satellite positioning.
Hye-In Kim, Kwan-Dong Park
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BVR PHOTOMETRY OF SUPERGIANT STARS IN HOLMBERG II [PDF]

Journal of Astronomy and Space Sciences, 2006
We report the photometric properties in BVR bands for the resolved bright supergiant stars in the dwarf galaxy Holmberg II. The color-magnitude diagrams and color-color diagram of 374 resolved stars indicate that the majority of the member stars are ...
Y.-J. Sohn, S. W. Chang, D.-Y. Kim, J.-W. Kim, S.-H. Kim, J.-E. Lee, J. G. Lee, J.-M. Lee, M.-Y. Lee, S.-Y. Lee, U.S. Lee, B.-K. Park, H.E. Park, I.-K. Park, W H. Park, H.-S. Yi, J.-Y. Yoon   +16 more
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Optical Constants of Ices Important to Planetary Science from Laboratory Reflectance Spectroscopy

The Planetary Science Journal
Laboratory-derived optical constants are essential for identifying ices and measuring their relative abundances on solar system objects. Almost all optical constants of ices important to planetary science come from experiments with transmission ...
S. C. Tegler, W. M. Grundy, M. J. Loeffler, P. D. Tribbett, J. Hanley, A. V. Jasko, H. Dawson, A. N. Morgan, K. J. Koga, A. O. Madden-Watson, M. D. Gomez, J. K. Steckloff, G. E. Lindberg, S. P. Tan, S. M. Raposa, A. E. Engle, C. L. Thieberger, D. E. Trilling   +17 more
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Chemical Composition of RR Lyn – an Eclipsing Binary System with Am and λ Boo Type Components [PDF]

Journal of Astronomy and Space Sciences, 2017
High-resolution spectroscopic observations of the eclipsing binary system RR Lyn were made using the 1.8 m telescope at the Bohuynsan Optical Astronomical Observatory in Korea.
Yeuncheol Jeong, Alexander V. Yushchenko, Dmytry N. Doikov, Vira F. Gopka, Volodymyr O. Yushchenko   +4 more
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Pre-impact Thermophysical Properties and the Yarkovsky Effect of NASA DART Target (65803) Didymos

The Planetary Science Journal
The NASA Double Asteroid Redirection Test (DART) spacecraft impacted the secondary body of the binary asteroid (65803) Didymos on 2022 September 26 and altered its orbit about the primary body.
Benjamin Rozitis, Simon F. Green, Samuel L. Jackson, Colin Snodgrass, Cyrielle Opitom, Thomas G. Müller, Ulrich C. Kolb, Steven R. Chesley, R. Terik Daly, Cristina A. Thomas, Andrew S. Rivkin   +10 more
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The Design Concept of the First Mobile Satellite Laser Ranging System (ARGO-M) in Korea [PDF]

Journal of Astronomy and Space Sciences, 2011
Korea Astronomy and Space Science Institute (KASI) launched the development project of two satellite laser ranging (SLR) systems in early 2008 after the government fund approval of the SLR systems in 2007.
Jung Hyun Jo, In Kwan Park, Hyung-Chul Lim, Yoon-Kyoung Seo, Hong-Seo Yim, Jin-Young Lee, Seung-Cheol Bang, Jakyoung Nah, Kwang Dong Kim, Jeong Gyun Jang, Bi Ho Jang, Jang Hyun Park, Jong-Uk Park   +12 more
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Learning Gravity Fields of Small Bodies: Self-adaptive Physics-informed Neural Networks

The Astronomical Journal
The reconstruction of the gravity field within the surface region of small bodies is crucial for the surface proximity operations of a probe. However, the irregular shape, uneven mass distribution, and sparse gravitational data of small bodies pose ...
Gangzheng Ai, Jihao Yin, Linyan Cui
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GPS TEC Fluctuations in the Low and High Latitudes During the 2015 St. Patrick`s Day Storm [PDF]

Journal of Astronomy and Space Sciences, 2017
As a part of collaborative efforts to understand ionospheric irregularities, the Korea ionospheric scintillation sites (KISS) network has been built based on global positioning system (GPS) receivers with sampling rates higher than 1 Hz.
Jong-Kyun Chung, Junseok Hong, Sung-Moon Yoo, Jeong-Han Kim, Geonhwa Jee, Valery V. Hegai   +5 more
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BSN: The First Photometric Study of 10 Contact Binary Systems from the Northern and Southern Hemispheres

The Astronomical Journal
Photometric observations were made with standard filters in four observatories for 10 contact binary systems. We analyzed the orbital period variations of the systems and found that six of them show long-term changes.
Atila Poro, Kai Li, Raul Michel, Angel Castro, Eduardo Fernández Lajús, Li-Heng Wang, Jean-François Coliac, Yasemin Aladağ, Ailar Alizadehsabegh, Fahri Alicavus   +9 more
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Moving Groups in the Solar Neighborhood with Gaia, APOGEE, GALAH, and LAMOST: Dynamical Effects Gather Gas and the Ensuing Star Formation Plays an Important Role in Shaping the Stellar Velocity Distributions

The Astronomical Journal
With Gaia, APOGEE, GALAH, and LAMOST data, we investigate the positional, kinematic, chemical, and age properties of nine moving groups in the solar neighborhood.
Xilong Liang, Suk-Jin Yoon, Jingkun Zhao
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