J/other/PSS/210.1 Astrometry of the 5 largest Uranian sat. (Camargo+, 2022)
The five largest satellites of Uranus: Astrometric observations spread over 29
years at the Pico dos Dias Observatory.
Camargo, J.I.B., Veiga, C.H., Vieira-Martins, R., Fienga, A., Assafin, M.
<Planetary and Space Science, 210, 105376 (2022)>
=2022P&SS..21005376C 2022P&SS..21005376C (SIMBAD/NED BibCode)
ADC_Keywords: Solar system ; Planets ; Positional data ; Ephemerides
Keywords: astrometry - Catalogs - Ephemerides - Uranian satellites
Abstract:
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 are those from the Gaia Early Data Release 3 (Gaia EDR3)
allowing, in addition to a higher accuracy, a larger number of
positions of the largest satellites as compared to our previous works.
From 1982 to 1987, positions were obtained from photographic plates.
From 1989 to 2011, CCDs were used. On average, we obtained
Δαcosδ=-11(±52) milli-arcseconds and
δδ=-14 (±43) milli-arcseconds for the differences in the
sense observation minus ephemerides (DE435+ura111). Comparisons with
different ephemerides (DE440, INPOP21a, INPOP19a and NOE-7-2013-MAIN)
and results from stellar occultations indicate a possible offset in
the (Solar System) barycentric position of the Uranian system
barycenter. Overall, our results are useful to improve dynamical
models of the Uranian largest satellites as well as the orbit of
Uranus.
Description:
Positions of Miranda, Ariel, Umbriel, Titania and Oberon from
observations spread over 29 years at the Pico dos Dias Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
miranda.dat 86 1680 Positions of Miranda
ariel.dat 86 3485 Positions of Ariel
umbriel.dat 86 3666 Positions of Umbriel
titania.dat 86 4442 Positions of Titania
oberon.dat 86 4456 Positions of Oberon
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See also:
J/A+AS/107/559 : Position of Uranian satellites (Veiga+, 1994)
J/A+AS/113/557 : Uranian satellites (Veiga+, 1995)
J/A+AS/138/247 : Uranian satellites 1995-1998 (Veiga+, 1999)
J/A+A/391/775 : Uranian satellites in 1995/97 (Shen+, 2002)
J/A+A/454/683 : Position of Uranian satellites (Veiga+, 2006)
J/other/PSS/134.96 : 2007-2016 Pulkovo Uranian satellites obs. (Ershova+, 2017)
Byte-by-byte Description of file: *.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (ICRF)
4- 5 I2 min RAm Right ascension (ICRF)
7- 13 F7.4 s RAs Right ascension (ICRF)
16 A1 --- DE- Declination sign (ICRF)
17- 18 I2 deg DEd Declination (ICRF)
20- 21 I2 arcmin DEm Declination (ICRF)
23- 28 F6.3 arcsec DEs Declination (ICRF)
31- 49 A19 "datime" Date Date of observation (YYYY/MM/DD.ddddd) (UTC)
52- 67 F16.8 d JD Julian Day (UTC)
70- 77 F8.3 arcsec DX Satellite apparent position, in the plane of
the sky, with respect to Uranus. Differential
coordinates in RA (1)
79- 86 F8.3 arcsec DY Satellite apparent position, in the plane of
the sky, with respect to Uranus. Differential
coordinates in DEC (2)
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Note (1): DX = (RAsat - RAUranus)*cos(DECUranus)
Note (2): DY = (DECsat - DECUranus)
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Acknowledgements:
Julio I.B. Camargo, camargo(at)on.br
(End) Julio Camargo [ON/MCTI, Brazil], Patricia Vannier [CDS] 14-Dec-2021