J/AJ/136/2214 Positions of Saturn and its satellites in 2002-2006 (Peng+, 2008)
CCD positions of Saturn and its major satellites from 2002-2006.
Peng Q.Y., Vienne A., Wu X.P., Gan L.L., Desmars J.
<Astron. J., 136, 2214-2221 (2008)>
=2008AJ....136.2214P 2008AJ....136.2214P
ADC_Keywords: Planets ; Positional data
Keywords: astrometry - planets and satellites: general -
techniques: image processing
Abstract:
This paper presents 2154 precise positions of Saturn and its major
satellites from 359 CCD exposures taken with the 1m telescope at the
Yunnan Observatory during the years 2002-2006.
Description:
During the period of 2002-2006, more than 1000 CCD exposures for
Saturn and its major satellites were made with the 1m telescope at the
Yunnan Observatory (geographical longitude: E102°47.3', latitude:
N25°1.5', and altitude: 2000m). The Johnson I-type filter was used
while observing.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 59 14 Distributions and solved parameters of our
observations
table4.dat 106 2872 The observations at Yunnan Observatory
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See also:
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+A/422/377 : 1997-2000 Saturn's satellites astrometry (Qiao+, 2004)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Set Data set
7 A1 --- m_Set [ab] Multiplicty index on Set
9- 18 A10 "YYYY/MM/DD" ObsDate Observation date
20- 21 I2 --- N Number of exposures corresponding to
the data set
23- 25 I3 min Per Period of time for each data set during
observing
27- 33 F7.5 arcsec/pix Scale1 Scale factor (solved parameter)
35- 41 F7.5 arcsec/pix Scale2 Scale factor (solved parameter)
43- 50 F8.3 deg Ori1 Orientation (solved parameter)
52- 59 F8.3 deg Ori2 Orientation (solved parameter)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Set Set identification from Table 2
7 A1 --- m_Set [ab] Multiplicty index on Set
9- 11 I3 --- ID Exposure identification
13- 30 A18 "datime" ObsDate Date of Observation, in
YYYY/MM/DD.ddddddd units (1)
32- 34 I3 --- Obs [286] IAU observatory code (2)
36 I1 --- t [0/1] Observation type (3)
38- 39 A2 --- Obj Subject satellite and reference satellite (4)
41- 48 F8.3 arcsec Obs1 First coordinate (5)
50- 57 F8.3 arcsec Obs2 Second coordinate (5)
59- 62 F4.2 arcsec e_Obs1 Estimated error in obs1 (6)
64- 67 F4.2 arcsec e_Obs2 Estimated error in obs2 (6)
69 I1 --- s [1] Reference system (7)
71 I1 --- f [0/1] Reference frame (8)
73- 78 F6.3 --- O-C1 ?=99.999 Residual of first observation (9)
80- 85 F6.3 --- O-C2 ?=99.999 Residual of second observation (9)
87 I1 --- r [0] Number of satellite or Saturn use as
reference in the computation of (O-C) (10)
89- 90 I2 --- se [1/14] Number of series (11)
92- 98 F7.2 pix Xpix ?=9999.99 Original X coordinate (12)
100-106 F7.2 pix Ypix ?=9999.99 Original Y coordinate (12)
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Note (1): UTC and not light-time corrected.
Note (2): From the Minor Planet Center.
Note (3): Observation type as follows:
0 = α,δ
1 = Δαcos(δ),Δδ
Note (4): Subject satellite and reference satellite as follows:
0 = Saturn
1-6 = S1-S6
C = center of the frame that is not a physical object
Note (5): Note that obs1 and obs2 for obj = C* mean the positions (unit: degree)
in the celestial coordinate system for the center point of a CCD frame.
Note (6): Errors from both pixel positions and calibration parameters are
taken into account. In the lines of Obj = C* and C0, e_obs1 and e_obs2
are all designed 0.00.
Note (7): Reference system:
1 = true equator and equinox of date of observation.
Note (8): Reference frame as follows:
1 = Geocentric
0 = Topocentric
Note (9): In arcsec when JPL ephemeris is referred. When obj = C* the
center's O-C1 and O-C2 are designed 99.999 in two directions, and
9999.99 for its two pixel coordinates. When Obj = C0 the O-C1 and O-C2
is designed 0.000 in two directions.
Note (10): 0 = Saturn.
Note (11): For the scale factor and orientation corresponding to each
series, look in Table 2.
Note (12): In the sense of xs - xr and ys - yr.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 20-May-2011