J/A+A/391/775 Uranian satellites in 1995/97 (Shen+, 2002)
Astrometry of five Uranian satellites in 1995 and 1997
Shen K.X., Qiao R.C., Harper D., Hadjifotinou K.G., Liu J.R.
<Astron. Astrophys. 391, 775 (2002)>
=2002A&A...391..775S 2002A&A...391..775S
ADC_Keywords: Planets ; Positional data
Keywords: planets and satellites: general
Description:
In this paper, we publish measurements of 864 positions of the major
satellites of Uranus made in 1995-1997 using CCD (1024"*1024")
detectors attached to the 1.56-metre Astrometric Telescope at the
Sheshan station near Shanghai. Analysis of the data as inter-satellite
positions shows that the observations of Ariel, Umbriel, Titania and
Mirand relative to Oberon have root-mean-square residuals of
0.03"-0.05", except for the innermost and faintest satellite Miranda,
whose residuals exceeded 0.08" due to the proximity of Uranus.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 50 566 Observations made on 1995-1997
table2.dat 85 11 Calibration parameters for each night of
observations
fig4-1.ps 132 3850 Spectra
fig4-2.ps 132 3850 Spectra (continued)
fig4-3.ps 132 3838 Spectra (continued)
fig4-4.ps 132 3857 Spectra (continued)
fig4-5.ps 132 3909 Spectra (continued)
fig4-6.ps 132 3897 Spectra (continued)
fig4-7.ps 132 3641 Spectra (continued)
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See also:
J/A+AS/130/77 : Astrometry of Satellites of Uranus (Jones+ 1998)
J/A+AS/121/65 : 1990-1994 Saturn's satellites astrometry (Harper+ 1997)
J/A+AS/139/305 : Position of Saturn's satellites (1982-1988) (Veiga+, 1999)
J/A+AS/139/47 : 1995 Saturnian satellites mutual events (Emelianov+, 1999)
J/A+A/383/296 : Saturnian Satellites positions (1996-2000) (Peng+, 2002)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Obs.date U.T.C. time of the middle of the exposure
12- 13 I2 h Obs.h Hour of the observation
15- 16 I2 min Obs.m Minute of the observation
18- 19 I2 s Obs.s Second of the observation
23 I1 --- Nsat Satellite number (1)
26- 31 F6.2 pix Xpos Measured (X) row coordinate (2)
34- 39 F6.2 pix Ypos Measured (Y) column coordinate (2)
42- 45 F4.2 pix resXpos Residuals in (X) row coordinate (2)
48- 50 F3.2 pix resYpos Residuals in (Y) column coordinate (2)
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Note (1): Satellite number:
1: Ariel, 2: Umbriel, 3: Titania, 4: Oberon, 5: Miranda
Note (2): The coordinates of the satellites are given in units of pixels,
relative to the axes of the CCD device. In order to convert them to
differential coordinates referred to the Earth's true equator and
equinox of date, you must use the calibration parameters given in
table2.dat
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Dataset Dataset (date)
12- 18 F7.4 deg DP ΔP from Numerical integration
20- 25 F6.4 deg e_DP rms uncertainty on DP
27- 34 F8.6 arcsec/pix rho rho from Numerical integration
36- 43 F8.6 arcsec/pix e_rho rms uncertainty on rho
45- 51 F7.4 deg DPG ΔP from GUST86
53- 58 F6.4 deg e_DPG rms uncertainty on DPG
60- 67 F8.6 arcsec/pix rhoG rho from GUST86
69- 76 F8.6 arcsec/pix e_rhoG rms uncertainty on rhoG
78- 79 I2 --- Ariel Number of calibration satellites
(Ariel) (1)
81- 82 I2 --- Umbriel Number of calibration satellites
(Umbriel) (1)
84- 85 I2 --- Titania Number of calibration satellites
(Titania) (1)
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Note (1): Oberon was the reference satellite
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Acknowledgements: K.X. Shen
References:
Qiao et al., 1999A&AS..137....1Q 1999A&AS..137....1Q, 1994-1996 CCD astrometric observations of
Saturn's satellites and comparison with theories
(End) Patricia Bauer [CDS] 19-Jun-2002