16.02.2021
Catalog of asteroid positions and magnitudes from digit-ized photographic observations in Baldone (Latvia)
O.M. Yizhakevych1, I. Eglitis2, S.V. Shatokhina1, V.M. Andruk1, Yu. I. Protsyuk3
1Main Astronomical Observatory of National Academy of Sciences, Kyiv, Ukraine
22Baldone Observatory, Institute of Astronomy, University of Latvia, Raina blvd. 19, Riga, LV 1586, Latvia
3Research Institute "Mykolaiv Astronomical Observatory", Mykolaiv, Ukraine
The Baldone Observatory of the Institute of Astronomy of the Latvian University owns a photographic collection of 22,633 astronomical negatives obtained using 1.2 m Schmidt telescope (IAU code 069). Among them there are about 780 plates in the U photometric band and 4600 film negatives [2] in the V band, which are close to the Johnson's photometric system. The observational period started in 1966 and lasted for 39 years.
In 2013-2018, the Baldone Observatory performed regular digitization of photographic negatives [3]. The negatives were digitized using commercial Epson Expression 10000XL scanner with a resolution of 1200 dpi or 2400 dpi. The processing of digitized scans was carried out by the observers at the Bal-done Observatory, the Research Institute "Mykolaiv Astronomical Observatory" and the Main Astro-nomical Observatory of the National Academy of Sciences of Ukraine. The U and V magnitude data of stars and galaxies will be used as a photometric supplement to the Northern Sky Survey project [1, 4]. At present, 281 plates and 2167 film negatives exposed in U and V photometric ranges have been used to asteroid searching.
Based on the scan processing results, a catalog of 1848 topocentric positions and magnitudes of aster-oids and comets was compiled. It includes 1678 and 170 positions and magnitudes from observations in the V and U bands, respectively. It also contains seven positions and magnitudes of comets. Such images of asteroids, which were recorded on photographic negatives in the immediate vicinity of im-ages of stars from the Gaia DR2 catalog, were excluded from the compiled catalog. We considered them to be ambiguous identifications of images of asteroids.
Astrometric and photometric reduction of digitized astronomical negatives is performed in the Tycho-2 reference system and photoelectric standards, respectively. Additional data to the catalog contain the values of the rms errors in determining the equatorial coordinates and magnitudes of the Tycho-2 ref-erence stars for each plate. A preliminary analysis of the catalog data is described in detail in articles [5, 6]. The comparison results of the asteroid positions with the JPL ephemeris (https://ssd.jpl.nasa.gov) are presented by histograms of O-C differences in the following figures.
Data description:
Right ascension and declination: ICRF/J2000.0
.DAT FILEs' SUMMARY
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 This file
ASTEROIDS_Baldone.dat 91 1848 Catalog of the topocentric positions
and magnitudes of asteroids and comets
ADD_ASTEROIDS_Baldone.dat 23 554 Additional data to the Catalog
Byte-by-byte Description of files: ASTEROIDS_Baldone.dat
--------------------------------------------------------------------------------
Bytes Format Units Explanations
--------------------------------------------------------------------------------
01-05 I5 number Plate number according to plate archive
07-07 A1 band Photometric band V or U
09-12 I4 year UTC date of observation, year
14-15 I2 month UTC date of observation, month
17-25 F9.6 day UTC date of observation, day
27-35 A9 name Name of an asteroid or a comet
37-38 I2 hour Right Ascension J2000, hours
40-41 I2 minute Right Ascension J2000, minutes
43-48 F6.3 second Right Ascension J2000, seconds
50-50 A1 ---- Sign of Declination J2000
51-52 I2 degree Declination J2000, degrees
54-55 I2 arcmin Declination J2000, arcminutes
57-61 F5.2 arcsec Declination J2000, arcseconds
63-67 F5.2 mag V or U magnitude of the asteroid
69-73 F5.2 arcsec Diameter of the asteroid image, arcseconds
75-79 F5.2 arcsec Difference (O-C)RA =15*(O-C)RAcos(DEC),
arcseconds
81-85 F5.2 arcsec Difference (O-C)DEC, arcseconds
87-91 F5.2 mag Difference V-Mv or U-Mv, magnitude,
Mv-apparent visual asteroid magnitude
calculated by JPL ephemeris)
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Byte-by-byte Description of file: ADD_ASTEROIDS_Baldone.dat
--------------------------------------------------------------------------------
Bytes Format Units Explanations
--------------------------------------------------------------------------------
01-05 I5 number Plate number according to plate ar-chive
07-11 f5.2 arcsec Root mean square error, Right Ascen-sion
13-17 f5.2 arcsec Root mean square error, Declination
19-23 f5.2 mag Root mean square error, V or U magni-tude
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Data (171 Kb).File: ASTEROIDS_Baldone.dat.
Data (13 Kb).File: ADD_ASTEROIDS_Baldone.dat.
Alternative links:
Data (171 Kb).File: ASTEROIDS_Baldone.dat.
Data (13 Kb).File: ADD_ASTEROIDS_Baldone.dat.
References
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2. Eglite, M.; Eglitis, I. Baldone Schmidt (Latvia) Telescope Astrophotos Archive, Odessa Astron. Publ., 2016, vol. 29, p.120
3. Eglitis, I.; Andruk, V. Processing of Digital Plates1.2m of Baldone Observatory Schmidt Tele-scope, Open Astronomy, 2017, vol. 26, is.1, p.7
4. Eglitis, I.; Eglite, V.; Andruk, V.; Protsyuk, Yu.; Protsyuk, S.; Kovylianska, O. Baldone 1.2m Telescope Plate Archive - Hidden Reserves of the FON Project, Odessa Astron. Publ., 2018, vol. 31, p. 208
5. Eglitis, I.; Eglite, M.; Shatokhina, S. V.; Andruk, V. M. Obtaining Positions of Asteroids from Digitized Processing of Photographic Observations in Baldone Observatory (Code 069), Odessa Astron. Publ., 2016, vol. 29, p.123
6. Eglitis, I.; Yizhakevych, O.; Shatokhina, S.; Protsyuk, Yu.; Andruk, V., Asteroid Search Results for Digitized Astroplates of 1.2m Telescope in Baldone, Odessa Astron. Publ., 2019, vol. 32, p.189
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Catalog of asteroid positions and magnitudes from digitized photographic observations in Baldone (Latvia)
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All-Sky Compiled Catalogue
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N. V. Kharchenko, L. K. Pakulyak,
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A. E. Piskunov, E. Schilbach
The extremely young open cluster NGC 6611.
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a catalog of absolute proper motions of stars with respect to galaxies.
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a catalog of absolute proper motions of stars with respect to galaxies.
A. I. Yatsenko & S. P. Rybka
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Catalogue of 2.2 million
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S. P. Rybka & A. I. Yatsenko
Compiled catalogue of
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S. P. Rybka & A. I. Yatsenko
Compiled catalogue of proper motions
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V. N. Andruk
Photometric survey near
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V. N. Andruk, V. G. Parusimov,
T. B. Dudnik, D. E. Ostrovskij
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Cross-identifications
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