ADC/CDS Standard Document for Catalog:/journal_tables/A+AS/136/257/
ADC/CDS Standard Document for Catalog:| 1. Use the ADC Data Viewer Suite to visualize the data. |
|
| 2. Get the data files via anonymous FTP. (See Note.) |
|
J/A+AS/136/257 Saturn's satellites in 1995/97 (Harper+ 1999)
================================================================================
CCD astrometry of Saturn's satellites in 1995 and 1997
Harper D., Beurle K.,I.P.Williams, Murray C.D., Taylor D.B.,
Fitzsimmons A., Cartwright I.M.
<Astron. Astrophys. Suppl. Ser. 136, 257 (1999)>
=1999A&AS..136..257H (SIMBAD/NED BibCode)
================================================================================
ADC_Keywords: Planets ; Positional data
Keywords: planets and satellites: satellites of Saturn - astrometry
Description:
In this paper, we publish measurements of 1514 positions of the major
satellites of Saturn made in 1995 and 1997 using CCD detectors
attached to the 1-metre Jacobus Kapteyn Telescope on the island of La
Palma. Analysis of the data as inter-satellite positions shows that
the observations of Tethys, Dione, Rhea and Titan have
root-mean-square residuals of 0.08 arc-seconds in 1995 and 0.10
arc-seconds in 1997.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table6.dat 162 110 Observations made in 1995 (1)
table7.dat 162 90 Observations made on 1997 October 21-22 (1)
table8.dat 162 69 Observations made on 1997 October 22-23 (1)
table9.dat 162 35 Observations made on 1997 October 23-24 (1)
--------------------------------------------------------------------------------
Note (1): The coordinates of the satellites in Tables 6--9 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 formulae given in Sec.3
of the paper and the calibration coefficients given in Table 4.
--------------------------------------------------------------------------------
See also:
J/A+AS/121/65 : 1990-1994 Saturn's satellites astrometry (Harper+ 1997)
J/A+AS/120/107 : 1989-1994 CCD observations of Triton (Veiga+ 1996)
J/A+AS/131/291 : 1995-1997 CCD positions of Triton (Veiga+ 1998)
J/A+AS/136/445 : CCD observations of Nereid (Veiga 1999)
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+AS/143/405 : Astrometric observations of Helene (Veiga+, 2000)
Byte-by-byte Description of file: table6.dat table7.dat table8.dat table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 yr OBS.Y Year of the observation (1)
6- 7 I2 "month" OBS.M Month of the observation (1)
9- 17 F9.6 d OBS.D Day of the observation (1)
19- 23 F5.1 s Exp Length of the exposure (2)
25- 32 8I1 --- Flags [0/1] Boolean flags indicating presence (1)
or absence (0) of each satellite in the image
33- 40 F8.2 pix xiMimas ? Mimas {xi} column coordinate, if present
41- 48 F8.2 pix etaMimas ? Mimas {eta} row coordinate, if present
49- 56 F8.2 pix xiEnc ? Enceladus {xi} column coordinate, if present
57- 64 F8.2 pix etaEnc ? Enceladus {eta} row coordinate, if present
65- 72 F8.2 pix xiTethys ? Tethys {xi} column coordinate, if present
73- 80 F8.2 pix etaTethys ? Tethys {eta} row coordinate, if present
81- 88 F8.2 pix xiDione ? Dione {xi} column coordinate, if present
89- 96 F8.2 pix etaDione ? Dione {eta} row coordinate, if present
97-104 F8.2 pix xiRhea ? Rhea {xi} column coordinate, if present
105-112 F8.2 pix etaRhea ? Rhea {eta} row coordinate, if present
113-120 F8.2 pix xiTitan ? Titan {xi} column coordinate, if present
121-128 F8.2 pix etaTitan ? Titan {eta} row coordinate, if present
129-137 F9.2 pix xiHyp ? Hyperion {xi} column coordinate, if present
138-146 F9.2 pix etaHyp ? Hyperion {eta} row coordinate, if present
147-154 F8.2 pix xiIap ? Iapetus {xi} column coordinate, if present
155-162 F8.2 pix etaIap ? Iapetus {eta} row coordinate, if present
-------------------------------------------------------------------------------
Note (1): U.T.C. time of the start of the exposure
Note (2): Add half of this value to the start date to obtain the
mid-exposure time
--------------------------------------------------------------------------------
Acknowledgements: David Harper <david@obliquity.u-net.com>
================================================================================
(End) Patricia Bauer [CDS] 06-Apr-1999