Search Publications
Astrometry with PRAIA
Assafin, M.
PRAIA - Package for the Reduction of Astronomical Images Automatically - is a suite of astrometric and photometric tasks designed to cope with huge amounts of heterogeneous observations with fast processing, no human intervention, minimum parameterization and yet maximum possible accuracy and precision. It is the main tool used to analyse astronom…
Physical properties of the slow-rotating near-Earth asteroid (2059) Baboquivari from one apparition
Kim, Myung-Jin; Lee, Hee-Jae; Erece, Orhan +6 more
In this study, we carried out photometric, spectroscopic, and for the first time, polarimetric observations of the Amor-type near-Earth asteroid (2059) Baboquivari. Our findings represent the first reliable determination of Baboquivari's physical properties. We used data from a 1m-class telescope (T100) along with ALCDEF data for photometric analy…
New reduction of old glass astronomical plates of Pallas and Vesta in 1956-1994 based on Gaia DR3 catalogue
Ehgamberdiev, Sh. A.; Dong, S.; Yu, Y. +9 more
Through a key project for intergovernmental international cooperation between Uzbekistan and China, a group of old glass astronomical plates of Pallas and Vesta taken by the TAS033 telescope at Tashkent observation site of Ulugh Beg Astronomical Institute in 1956-1994 have been digitized using the digitizer with sub-micrometer measuring precision …
The five largest satellites of Uranus: Astrometric observations spread over 29 years at the Pico dos Dias Observatory
Fienga, A.; Assafin, M.; Camargo, J. I. B. +2 more
We present the astrometry of the five largest satellites of Uranus from observations spread over almost three decades with photographic plates and CCDs (mainly), taken at the Pico dos Dias Observatory - Brazil. All positions presented here are obtained from the reanalysis of measurements and images used in previous publications. Reference stars ar…
Complementary astrometry of Cassini Imaging Science Subsystem images of Phoebe
Li, Y.; Cooper, N. J.; Lainey, V. +5 more
Phoebe is the only major satellite of Saturn with a retrograde orbit. The Cassini Imaging Science Subsystem (ISS) took a lot of Phoebe images between 2004 and 2017, but only a selection of them has been reduced. In this paper, we reduced the remaining ISS images of Phoebe. In the reduction, the Gaia EDR3 catalogue was used to provide the reference…
The astrometric results of observations of fast-moving NEAs during close approach to the Earth
Yu, Yong; Tang, Zheng-Hong; Pomazan, Anton +4 more
Current investigation is devoted to ongoing follow-up observations of fast-moving near-Earth asteroids (NEAs) carried out with Rotating-drift-scan CCD technique on small-aperture telescopes in China and Ukraine. The observations were obtained during closest approach (CA) to the Earth in order to get more observational points and extend observation…
Pulkovo observations of apparent close approaches between near-earth asteroids and the Gaia stars in 2019-2020
Bikulova, D. A.
The astrometric observations of the apparent close approaches between near-Earth asteroids and the Gaia stars provide high quality data for studies on the dynamics of these objects. We present the technique of data analysis that allows us to decrease the distortion-dependent positional errors and observational results of eight of such events perfo…
Spin pairs in the Koronis asteroid family
Carruba, V.; Aljbaae, S.; Martins, B. +4 more
Asteroid groups may either form because of collisions or the rotational failure of a parent body. Collisional asteroid families tend to be more spread in proper element domains, while young spin clusters are usually much more compact. Recently, it has been shown that young spin clusters may form at higher rates in extremely young asteroid families…
Re-reduction of CCD astrometric observations of Neptunian satellites in 2006-2007 based on Gaia DR2 and comparison with ephemerides
Cheng, X.; Yan, D.; Qiao, R. C. +3 more
Based on the newly released Gaia DR2 star catalogue, the CCD images of Neptunian satellites taken by the telescopes at Xinglong Observatory of National Astronomical Observatory in 2006-2007 were re-reduced. A total of 174 satellite positions were derived, including 34 new observed positions of Triton, 28 new and 112 updated observed positions of N…
New phase-magnitude curves for some main belt asteroids, fit of different photometric systems and calibration of the albedo - Photometry relation
Cellino, A.; Carbognani, A.; Caminiti, S.
Results of photometric observations of a small sample of selected Main Belt asteroids are presented. The obtained measurements can be used to achieve a better calibration of the asteroid photometric system (H, G1 , G2) adopted by the IAU, and to make comparisons with best-fit curves that can be obtained using different photom…