J/A+A/437/1147 Amalthea and Thebe CCD astrometric obs. (Veiga+, 2005)
CCD astrometric observations of Amalthea and Thebe.
Veiga C.H., Vieira Martins R.
<Astron. Astrophys., 437, 1147-1150 (2005)>
=2005A&A...437.1147V 2005A&A...437.1147V
ADC_Keywords: Planets ; Positional data
Keywords: astrometry - Jupiter satellites - Amalthea and Thebe
Abstract:
This paper presents the results of observations of Jupiter's
satellites Amalthea and Thebe made in 1995, 1996 and 2001 at the
Laboratorio Nacional de Astrofisica (LNA), Brazil. The observations
were made in visible light wavelengths with a 1.6m reflector telescope
and the light of Jupiter was covered by a mask placed near the CCD
surface. The already published positions for 1995, whose astrometric
reduction used the Galilean satellites, are now reduced using the
stars in the CCD fields like the new positions of 1996 and 2001. The
2001 data are much better than those obtained in 1995, and that those
from 1996 show large residuals. Considering the 310 frames observed,
the mean residual is about 0.01" and the standard deviation is about
0.15".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 91 332 Topocentric observed positions of Amalthea and Thebe
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See also:
J/other/KFNT/15.483 : Positions of Thebe and Amalthea (Ledovskaya+ 1999)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 15 F15.7 d JD Instant of observation in Julian date and fractions
17- 18 I2 h RAh Amalthea observed right ascension (J2000)
20- 21 I2 min RAm Amalthea observed right ascension (J2000)
23- 29 F7.4 s RAs Amalthea observed right ascension (J2000)
31 A1 --- DE- Amalthea observed declination sign (J2000)
32- 33 I2 deg DEd Amalthea observed declination (J2000)
35- 36 I2 arcmin DEm Amalthea observed declination (J2000)
38- 44 F7.4 arcsec DEs Amalthea observed declination (J2000)
46- 47 I2 h RATh Thebe observed right ascension (J2000)
49- 50 I2 min RATm Thebe observed right ascension (J2000)
52- 58 F7.4 s RATs Thebe observed right ascension (J2000)
60 A1 --- DET- Thebe observed declination sign (J2000)
61- 62 I2 deg DETd Thebe observed declination (J2000)
64- 65 I2 arcmin DETm Thebe observed declination (J2000)
67- 73 F7.4 arcsec DETs Thebe observed declination (J2000)
75- 82 F8.4 arcsec x x=Δαcosδ
84- 91 F8.4 arcsec y y=Δδ
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Acknowledgements: Carlos Veiga, cave(at)mail.on.br
(End) Patricia Vannier [CDS] 15-Jul-2005