Access to Astronomical Catalogues

← Click to display the menu
J/other/PSS/134.96  2007-2016 Pulkovo Uranian satellites obs.   (Ershova+, 2017)

Astrometric observations of the main Uranian satellites at the Pulkovo Observatory in 2007-2016. Ershova A.P., Roshchina E.A., Izmailov I.S. <Planetary and Space Science, 134, 96-99> =2017P&SS..134...96E (SIMBAD/NED BibCode)
ADC_Keywords: Minor planets ; Positional data Keywords: CCD astrometry - Uranian satellites - planets and satellites: individual: Ariel, Umbriel, Titania, Oberon Abstract: We present the results of the observations of the Uranian satellites made with the 26-inch refractor at the Pulkovo Observatory in 2007-2016. During this time we got 17 normal positions of Ariel, 43 normal positions of Umbriel, 112 normal positions of Titania and 122 normal positions of Oberon. The observations were performed every year from the end of august to the beginning of January. Our results show a good quality of contemporary theories of Uranian satellites' and planets' motion. Published positions of the Uranian satellites can be useful for construction of future theories. Almost 7000 CCD frames were analyzed and reduced using the UCAC4 catalog. Observation processing and coordinate measurement were performed with the IZMCCD software package (izmccd.puldb.ru). Special approach was used to eliminate a scattered halo caused by the bright planet. Description: Observations of the main Uranian satellites were made with the 26-inch refractor (D/F=65cm/1041.3cm) at the Pulkovo Observatory in 2007-2016. The CCD camera FLI Pro Line was used (3056x3056px, each pixel of 12-microns). The field of view -- 12'x12', focal plane scale -- 19.8"/mm, scale on the CCD frames -- 0.24"/px. The UCAC4 catalog was used as a reference. Coordinates' epoch is the J2000.0. Average values of Standart Error of the Mean (SEM) of RA and DEC for each satellite are shown in table below. Satellite RA_SEM DEC_SEM ------------------------------------------------ Ariel (U1) 0.06" 0.06" Umbriel (U2) 0.05" 0.07" Titania (U3) 0.02" 0.02" Oberon (U4) 0.02" 0.02" ------------------------------------------------ Coordinates with their errors are shown in the "obsperr.dat" file. The "obs.dat" file was made according to MPC format and contains data in the same order as "obsperr.dat". Both files contain date of observation and satellite index so sit is easy to compare strings. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file obs.dat 81 301 Data in MPC-like format obsperr.dat 81 301 Same data as in ob.sdat file with corresponding errors of coordinates
See also: http://www.puldb.ru/db/sdb.php : Pulkovo Database of Observations of Planets and Their Satellites Byte-by-byte Description of file: obs.dat obsperr.dat
Bytes Format Units Label Explanations
1 A1 --- Planet [U] Planet identifier 2 I1 --- Sat [1/4] Satellite number 4 A1 --- S [S] 6 A1 --- N1 [H] label H for hand measurement of CCD image 7 A1 --- N2 [C] label C for CCD 9- 28 A20 "date" Obs.date Date of observation (YYYY/MM/DD.ddddd) 29- 30 I2 h RAh Right ascension (J2000) 32- 33 I2 min RAm Right ascension (J2000) 35- 41 F7.4 s RAs Right ascension (J2000) 42 A1 --- DE- Declination sign (J2000) 43 I1 deg DEd Declination (J2000) 45- 46 I2 arcmin DEm Declination (J2000) 48- 53 F6.3 arcsec DEs Declination (J2000) 55- 57 I3 --- Obscode Observatoy's code 59- 63 F5.3 arcsec s_RAs ? Root mean square (RMS) of RA 65- 69 F5.3 arcsec s_DEs ? Root mean square (RMS) of DE 71- 75 F5.3 arcsec e_RAs ? Standart error (SEM) of RA 77- 81 F5.3 arcsec e_DEs ? Standart error (SEM) of DE
Acknowledgements: Anastasiia Ershova, vveyzaa(at)gmail.com
(End) Patricia Vannier [CDS] 03-Nov-2016
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact