Contents.
planet: 6 - Saturn
satellites: S1-Mimas : 54
S2-Enceladus: 161
S3-Tethys : 145
S4-Dione : 161
S5-Rhea : 145
S7-Hiperion : 121
S8-Iapetus : 126
total number: 913
type: relative
dates: 1996-2000
observatory: 286 - Yunnan Observatory
Reference.
Peng Q., Vienne A., Shen K.X.
Positional measuring procedure and CCD observations
for Saturnian satellites.
Astronomy and Astrophysics. V. 383. P. 296-301.
2002A&A___383__296P
Informations.
relative to: S5-Rhea : 216
S6-Titan : 697
reference frame: astrometric
centre of frame: geocentre
epoch of equinox: J2000
time scale: UTC
reduction: see reference
coordinates: X, Y
diff. refraction: no information
receptor: CCD
telescope: Reflector, D = 1 m.
observers: Peng Q., Vienne A., Shen K.X.
data included in standard data file: no
Comments.
The calibrated parameters of the CCD scale and orientation are
determined by the comparison of their measurement coordinates
with computed positions of four bright satellites of
Tethys, Dione, Rhea and Titan.
Analysis of
the data as inter-satellite positions shows that these observations of
the above mentioned four satellites have root-mean-square residuals of
0.04 arcsec in the sense of (O-C) (Observed minus Computed).
Format.
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Bytes Format Units Label Explanations
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1- 3 I3 --- Opp *Opposition number
5- 8 I4 yr Obs.Y *The year for observations
10- 11 I2 "month" Obs.M *Month for observations
13- 22 F10.7 d Obs.D *UTC date of observations
24- 29 F6.3 s TT-UTC TT-UTC difference
31- 33 A3 --- Obs [286] Observatory code from Minor Planet Center
35- 37 A3 --- Ref [302] Reference code of the catalog (here 302)
39 I1 --- ObsType *[0/1] Observation type
42- 43 A2 --- Obj *Subject satellite, reference satellite
45- 46 A2 --- Note *[0/1] The flag of presence of both coordinates
49- 60 F12.7 arcsec ObsRA The observed coordinates in Right Ascension
63- 74 F12.7 arcsec ObsDE The observed coordinates in Declination
76 I1 --- RefSys *[0/2] The reference system
78 I1 --- Frame [1] The reference frame. Here, 1=geocentric
80- 86 F7.3 arcsec O-CRA ?=999.999 Residuals of observations in
Right Asension
88- 94 F7.3 arcsec O-CDE ?=999.999 Residuals of observations in
Declination
97 I1 --- Rsat Reference satellite when o-c is computed
100 I1 --- --- [0] Index reserved
103 I1 --- NSer *The number of the series
105-113 F9.3 pix Xpos *?=99999.999 Original coordinate in X direction
115-123 F9.3 pix Ypos *?=99999.999 Original coordinate in Y direction
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Note on Opp:
Oppsition number. 119 for 1996 to 123 for 2000
Note on Obs.Y, Obs.M, Obs.D:
The date is not light time corrected for the UTC
Note on ObsType:
0 = alpha, delta
1 = Delta(alpha)cos(delta), Delta(delta)
Note on Obj:
0 for Saturn, 1 to 8 for S1 to S8
* when there is no reference satellite that is for observation
type 0, C for the center of the plate which is not a physical object
Note on Note:
0 = observation absent
1 = observation present
Note on RefSys:
0 = mean equator and equinox B1950
1 = true equator and equinox of date of observation
2 = mean equator and equinox J2000
Note on NSer:
1,2,3 and 4 is for 1996, 1997, 1999 and 2000 series respectively. The scale
and orientation are the same for all the observations of one series
Note on Xpos, Ypos:
Difference in raw pixel coordinate between subject satellite and reference
satellite in X- anf Y-direction
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