Catalogue of Asteroids from Digitized Photographic Plates of the FON Program

Shatokhina, S. V.; Kazantseva, L. V.; Yizhakevych, O. M.; Andruk, V. M.

doi:10.3103/s0884591318050045

Cited by 13 publications

(10 citation statements)

References 13 publications

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“…These are the early positions of the selected minor planets, mostly bright, the observations of which were initiated by the founders of the ORBITA observational program and were made in 1949-1996(Golovnya et al, 2001Major et al, 1984;Onegina et al, 1970;Vasilenko et al, 1979). The second later positions of asteroids obtained from digitized photographic observations of the Northern Sky Survey project in 1981-1996 (Shatokhina et al, 2018). Fig.…”

Section: Resultsmentioning

confidence: 99%

The Re-Processing Results of Photographic Observations of Asteroids With Gaia Catalog at the Mao Nas of Ukraine

Shatokhina

Kazantseva

Andruk

2019

OAP

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In total, about 4,500 asteroid po-sitions were determined from photographic observations conducted at the MAO NAS of Ukraine in 1952-1996. These are the early positions of the selected minor planets, mostly bright, the observations of which were initiated by the founders of the ORBITA observational program and were made in 1952-1986. The second later positions of asteroids obtained from digitized plates from photographic observations of the Northern Sky Survey project in 1981-1996.Using digital plate processing technologies, 2292 asteroid positions were obtained, the images of which were fixed during observations and identified during processing.The new star catalog Gaia DR2 was used to study changes in determining the accuracy of equatorial coordinates for various faint objects on plates. For several 8 plates with images of Pluto comets and faint asteroids of particular interest due to the lack of observations in the past, new complete processing of scans of these plates was performed. The Gaia DR2 was used as a reference catalog.The asteroid positions from early observations of 1952-1986 were determined in accordance with classical linear reduction algorithms. These are 1651 positions of minor planets determined in the PPM catalog system and obtained from observations with the Double Wide-Angle Astrograph. The remaining 591 positions were determined in the systems of old reference catalogs of stars Yale, SAO, AGK3, and obtained from observations with the Double Long-Focus Astrograph. It was for these positions that the calibration with the Gaia catalog was performed. The data on the positions of minor planets digitized from publications and additional data on their reference systems deposited in previous years at VINITI (now VINITI Database RAS) were used.Comparison with JPL ephemeris was performed both for new determinations of asteroid coordinates with the Gaia catalog, and for past determinations obtained in systems of other reference catalogs.

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Section: Resultsmentioning

confidence: 99%

The Re-Processing Results of Photographic Observations of Asteroids With Gaia Catalog at the Mao Nas of Ukraine

Shatokhina

Kazantseva

Andruk

2019

OAP

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“…At the end of June 2018 about 150 photographic plates of zero (00) and polar (64, 68, 72 and 76) zones of the FON-Dushanbe photographic archive were digitized and processed. In parallel these digitized plates are used for the searching of asteroids and comets Shatokhina, 2017;Shatokhina, 2018). In the Astrophysics Institute of the Academy of Sciences of Tajikistan the work on scanning of plates continues.…”

Section: Resultsmentioning

confidence: 99%

Progress in the Realization of the Project Fon-Dushanbe Catalogue

Mullo-Abdolov

Relke²,

Кохирова

et al. 2018

OAP

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Since May 2018 the process of the scanning and processing of photographic plates from the archive of the Institute of Astrophysics Academy of Sciences of Tajikistan has begun. It is a matter of approximately 1560 photographic plates in the sky zones from-8 to +90 degrees that were exposed for the FON project in the Hissar observatory (HisAO) during 1985-1992. The plates are digitized by using of the scanner Microtek ScanMaker 1000XL Plus with the resolution of 1200 dpi. The size of the photographic plates is 8°x8° or 30x30 cm, the size of the digitized images is 13000 x 13000 px. So far the first results of the processing of the 71 plates of zero zone and the 58 plates of 64, 68 and 72 zones were obtained. The errors in the definition of equatorial coordinates and B-magnitudes for the stars in the range of 5 m-17 m are the following: σ αδ = ±0.33" and σ B = ±0.12 m. The differences between the calculated positions and Bmagnitudes and the reference one from the Tycho2 catalogue are σ αδ = ±0.12" and σ BT = ±0.19 m respectively. The difference between the calculated and the photoelectric Bmagnitudes equals σB = ±0.15 m. In the realization of the "FON-Dushanbe catalogue" project five astronomical institutions are involved:

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“…As a rule, the photometric standards for characteristic curve restoration from astronegatives, exposed in Johnson U, B, V or R bands (hereafter U, B, V, R ), are photoelectric data of stars in the same system (Relke, 2015). If the negative was obtained with two exposureslong and short ones (Andruk, 2012), the problem of the whole characteristic curve restoration is simplified and successfully solved in practice as it was done when FON project had been realizing (Akhmetov, 2018;Andruk, 2016a;Andruk, 2016b;Yuldoshev, 2016;Yuldoshev, 2017a;Yuldoshev, 2017b) or for other programs as it presented in (Protsyuk, 2017;Yizhakevych, 2015;Shatokhina, 2018).…”

Section: Introductionmentioning

confidence: 99%

Photometry of Stars for Astronegatives With a Single Exposure

Andruk

Eglitis

Protsyuk

et al. 2019

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The paper discusses the construction of characteristic curves for various astronegatives with a single exposure. Particular attention is paid to the question of extrapolation of the characteristic curve for the region of the weakest stars in the absence of standards. A new method for constructing an individual characteristic curve for digitized films and plates in the UBVR system has been proposed and implemented. The processing of frames of digitized plates and films with sky areas is carried out using LINUX/MIDAS/ROMAFOT software tools. ROMAFOT application allows us to extract astrometric rectangular coordinates X,Y and photometric characteristics such as instrumental photometric magnitudes m, FWHM, and the intensity in the center of the star image Ic for all fixed objects on each astronegative. For all frames, the connection between instrumental photometric values m with stellar magnitudes in any system (Johnson UBVR, Tycho-2 or GAIA catalogs, etc.) is not linear and multipurpose. It is presented as the characteristic curve for each astronegative. In general, the characteristic curve is approximated by a 5-degree polynomial and should take into account the color equation and the photometric field error. In practice, the most and the sometimes unsolvable problem is the lack of photometric standards for the flat part of the characteristic curve (the region of faint and extremely faint stars). As a rule, the photometric standards for characteristic curve restoration from astronegatives, exposed in Johnson U, B, V or R bands (hereafter U, B, V, R ), are photoelectric data of stars in the same system. The present work concentrates on the issue of a correct definition of stellar U, B, V, R magnitudes from astronegatives obtained with a single exposition in the case when photometric standards are absent for the flat part of the characteristic curve. Currently, the determination of U, B, V, R magnitudes of stars and other space objects is in progress for astronegatives with the single exposure obtained in the frameworks of selected observational projects.

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Catalogue of Asteroids from Digitized Photographic Plates of the FON Program

Cited by 13 publications

References 13 publications

The Re-Processing Results of Photographic Observations of Asteroids With Gaia Catalog at the Mao Nas of Ukraine

The Re-Processing Results of Photographic Observations of Asteroids With Gaia Catalog at the Mao Nas of Ukraine

Progress in the Realization of the Project Fon-Dushanbe Catalogue

Photometry of Stars for Astronegatives With a Single Exposure

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