J/other/SoSyR/45.523 CCD observations of saturnian satellites (Grosheva+, 2011)
CCD observations of saturnian satellites with 26-inch refractor.
Grosheva E.A., Izmailov I.S., Kiseleva T.P.
<Solar System Research, 45, 523 (2011)>
=2011SoSyR..45..523G 2011SoSyR..45..523G
ADC_Keywords: Planets; Solar system; Positional data
Abstract:
The astrometric positions of seven saturnian satellites are presented.
Positions were derived from more then 5000 CCD frames taken with
26-inch Zeiss refractor at Pulkovo from Jan 2008 to may 2009.
Astrometric reduction algorithm is based on Turner's method with using
UCAC2 catalog as reference one. Observed positions were compared with
theoretical ones from TASS 1.7 (Viennel & Duriez,
1995A&A...297..588V 1995A&A...297..588V). The accuracy is about 0.05 arcsec. Also
positions of Saturn were obtained from observations of satellites 2-6.
Description:
All observations were carried out with 26-inch Zeiss
refractor(D=650mm, F=10413mm, scale is 19.80"/mm) at Pulkovo
(code is 084). CCD camera FLI Pro Line 09000 (3056x3056pix) was used.
Scale per pixel is 0.24" and field observed with this camera is
12'x12'. Time of exposures is 1.5s. All presented positions are
topocentric. Ephemerides for comparison are given by web-server
"Natural Satellites Ephemeride Server MULTI-SAT" developed by N.V.
Emelyanov (http://lnfm1.sai.msu.ru/neb/nss/nssephmr.htm).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sat01.dat 87 183 Positions of saturnian satellites (2-7)
sat02.dat 78 355 Differences of saturnian satellites coordinates
sat03.dat 91 34 Positions of Saturn (corrected version)
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See also:
J/A+A/493/1183 : Saturn major satellites obs. (1874-2007) (Desmars+, 2009)
J/A+AS/139/305 : Position of Saturn's satellites (1982-1988) (Veiga+, 1999)
J/A+AS/121/65 : 1990-1994 Saturn's satellites astrometry (Harper+ 1997)
J/A+A/400/1095 : 1995-1999 CCD obs. of Saturnian satellite (Veiga+, 2003)
J/A+AS/139/47 : 1995 Saturnian satellites mutual events (Emelianov+, 1999)
J/A+A/383/1054 : Astrometry of Pluto and Saturn in 1995-2001 (Rapaport+, 2002)
J/A+AS/136/257 : Saturn's satellites in 1995/97 (Harper+ 1999)
J/A+A/422/377 : 1997-2000 Saturn's satellites astrometry (Qiao+, 2004)
J/A+A/391/767 : CCD observations of Phoebe in 1998-1999 (Fienga+, 2002)
J/A+A/485/293 : Events of Saturn satellites during 2009 equinox (Arlot+, 2008)
J/AJ/103/983 : Stellar occultation candidates of Saturn (Bosh+, 1992)
J/other/KFNT/15.483 : Positions of Thebe and Amalthea (Ledovskaya+ 1999)
J/AJ/136/2214 : 2002-2006 positions of Saturn and its satellites (Peng+, 2008)
Byte-by-byte Description of file: sat01.dat
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Bytes Format Units Label Explanations
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1 I1 --- sat [2/8] Number of saturnian satellite (G1)
3- 6 I4 yr Obs.Y Year of observation
8- 9 I2 --- Obs.M Month of observation
11- 21 F11.8 d Obs.D Moment of observation (UTC)
23- 24 I2 h RAh Right Ascension (J2000.0) (2)
26- 27 I2 min RAm Right Ascension (J2000.0) (2)
29- 35 F7.4 s RAs Right Ascension (J2000.0) (2)
37 A1 --- DE- Declination sign (J2000.0) (2)
38- 39 I2 deg DEd Declination (J2000.0) (2)
41- 42 I2 arcmin DEm Declination (J2000.0) (2)
44- 49 F6.3 arcsec DEs Declination (J2000.0) (2)
51- 56 F6.3 arcsec (O-C)RA O-C residuals in Right Ascension (3)
58- 63 F6.3 arcsec (O-C)DE O-C residuals in Declination (3)
65- 69 F5.3 arcsec e_(O-C)RA Error of mean O-C in Right Ascension
71- 75 F5.3 arcsec e_(O-C)DE Error of mean O-C in Declination
77- 81 F5.3 arcsec s(O-C)RA Sigma of O-C in Right Ascension
83- 87 F5.3 arcsec s(O-C)DE Sigma of O-C in Declination
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Note (2): topocentric equatorial coordinates of Saturnian satellites.
Note (3): residuals "Observed-Calculated" by TASS 1.7.
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Byte-by-byte Description of file: sat02.dat
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Bytes Format Units Label Explanations
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1 I1 --- s1 [3/8] First satellite in pair (G1)
2 A1 --- --- [-]
3 I1 --- s2 [2/7] Second satellite in pair (G1)
5- 8 I4 yr Obs.Y Year of observation
10- 11 I2 "month" Obs.M Month of observation
13- 23 F11.8 d Obs.D Moment of observation (UTC)
25- 32 F8.3 arcsec DRA Difference in Rigth Ascension (J2000) (1)
34- 40 F7.3 arcsec DDE Difference in Declination (J2000) (2)
42- 47 F6.3 arcsec (O-C)DRA O-C residuals in Right Ascension
49- 54 F6.3 arcsec (O-C)DDE O-C residuals in Declination
56- 60 F5.3 arcsec e_(O-C)DRA Error of mean O-C in Right Ascension
62- 66 F5.3 arcsec e_(O-C)DDE Error of mean O-C in Declination
68- 72 F5.3 arcsec s(O-C)DRA σ of O-C in Right Ascension
74- 78 F5.3 arcsec s(O-C)DDE σ of O-C in Declination
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Note (1): Differences in Rigth Ascension was multiplied by
cosinus of Declination, DRA*cosDE.
Note (2): Residuals "Observed-Calculated" for mutual satellites distances
by TASS 1.7.
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Byte-by-byte Description of file: sat03.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- sats [36/23456] Numbers of saturnian satellites (1)
7- 10 I4 yr Obs.Y [2008/2009] Year of observation
12- 13 I2 --- Obs.M Month of observation
15- 25 F11.8 d Obs.D Moment of observation (UTC)
27- 28 I2 h RAh Saturn Right Ascension (J2000.0) (2)
30- 31 I2 min RAm Saturn Right Ascension (J2000.0) (2)
33- 39 F7.4 s RAs Saturn Right Ascension (J2000.0) (2)
41 A1 --- DE- Saturn Declination sign (J2000.0) (2)
42- 43 I2 deg DEd Saturn Declination (J2000.0) (2)
45- 46 I2 arcmin DEm Saturn Declination (J2000.0) (2)
48- 53 F6.3 arcsec DEs Saturn Declination (J2000.0) (2)
55- 60 F6.3 arcsec (O-C)RA O-C residuals in Right Ascension (3)
62- 67 F6.3 arcsec (O-C)DE O-C residuals in Declination (3)
69- 73 F5.3 arcsec e_(O-C)RA Error of mean O-C in Right Ascension
75- 79 F5.3 arcsec e_(O-C)DE Error of mean O-C in Declination
81- 85 F5.3 arcsec s(O-C)RA Sigma of O-C in Right Ascension
87- 91 F5.3 arcsec s(O-C)DE Sigma of O-C in Declination
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Note (1): The digits give the numbers of the satellites which observations
were used for deriving positions of Saturn (see the "Note (G1)" below)
Note (2): Topocentric positions of Saturn obtained from observations of
satellites and its saturnocentric ephemerides by TASS 1.7.
Note (3): "Observed-Calculated" residuals by TASS 1.7.
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Global notes:
Note (G1): Satellite numbers as follows:
2 = Enceladus
3 = Tethys
4 = Dione
5 = Rhea
6 = Titan
7 = Hyperion
8 = Iapetus
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Acknowledgements:
Elena Grosheva <star-fox (at) yandex.ru>
History:
* 17-Oct-2011: Original version
* 09-Jan-2012: Insert into VizieR
* 20-Aug-2014: sat03.dat coordinates corrected by the author.
(End) Elena Grosheva, Veta Avedisova [INASAN] 17-Oct-2011