J/other/SoSyR/50.344 Galilean moons & Jupiter positions (Narizhnaya, 2016)
Observations of the Galilean moons of Jupiter in 2013-2015 at Pulkovo.
Narizhnaya N.V.
<Solar System Res., 50, 344 (2017)>
=2017SoSyR..50..344N 2017SoSyR..50..344N (SIMBAD/NED BibCode)
ADC_Keywords: Solar system ; Planets ; Positional data
Keywords: Galilean moons of Jupiter - astrometry - CCD observations -
exact positions - theory of satellite motion - theory of planets
Abstract:
Observational results are presented for Jupiter and its Galilean moons
from the Normal Astrograph at Pulkovo Observatory in 2013-2015. The
following data are obtained: 154 positions of the Galilean satellites
and 47 calculated positions of Jupiter in the system of the UCAC4
(ICRS, J2000.0) catalogue; the differential coordinates of the
satellites relative to one another are determined. The mean errors of
the satellites normal places in right ascension and declination over
the entire observational period are, respectively: (eps)RA=0.0065" and
(eps)DE=0.0068", and their standard deviations are (sigm)RA=0.0804"
and (sigm)DE=0.0845". The equatorial coordinates are compared with
planetary and satellite motion theories. The average (O-C) residuals
in the two coordinates relative to the motion theories are 0.05" or
less. The best agreement with the observations is achieved by a
combination of the EPM2011m and V. Lainey-V.2.0|V1.1 motion theories;
the average (O-C) residuals are 0.03" or less. The (O-C) residuals for
the features of the positions of Io and Ganymede are comparable with
measurement errors. Jupiter's positions calculated from the
observations of the satellites and their theoretical jovicentric
coordinates are in good agreement with the motion theories. The (O-C)
residuals for Jupiter's coordinates are, on average, 0.027" and
-0.025" in the two coordinates.
Description:
Our observations were carried out with the Normal Astrograph
(D/F=330mm/3467mm) at Pulkovo (code is 084). A (SBIG ST-L-11K 3) CCD
camera was used as a detector (with a field of view of 35'x25' and a
scale of 0.530"/pixel). The CCD_frames with object image were obtained
by series including 10-20 images, depending on exposures of 10, 5 and
0.5 s, respectively. The IZMCCD software package developed by Izmailov
I.S. (2005, http://iznccd.puldb.ru/ izmccdrus) was used in processing
the CCD images. Astrometric reduction algorithm is based on Turner's
method with using UCAC4 catalog as reference one. 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). Three catalogue are
presented: 154 normal positions of Galilean satellites, 77
differential mutual coordinates of Galilean satellites and 47 Jupiter
positions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
satsdat.dat 83 154 Positions of Galilean satellites
(1-Io, 2- Europa, 3-Ganymede, 4-Callisto)
satsatdt.dat 76 148 Differential mutual coordinates of
Galilean satellites
jovedat.dat 62 47 Positions of Jupiter
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See also:
J/A+A/314/312 : Galilean satellites mutual events in 1997 (Arlot 1996)
J/A+A/383/719 : Galilean Satellites mutual events 2002-2003 (Arlot, 2002)
J/A+A/427/371 : Galilean satellites ephemerides (Lainey+, 2004)
J/A+A/437/705 : Observations of PHEMU97 & PHEMU03 at Ukkel (Pauwels+, 2005)
J/A+A/493/1171 : Galilean satellites mutual phenomena PHEMU03 (Arlot+, 2009
J/A+A/532/A36 : Galilean satellites mutual events in 2009 (Zhang, 2011)
J/A+AS/125/399 : Mutual phenomena of the Galilean satellites (Arlot+ 1997)
J/other/SoSyR/49.383 : Galilean sat. & Jupiter positions (Narizhnaya, 2015)
Byte-by-byte Description of file: satsdat.dat
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Bytes Format Units Label Explanations
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1 I1 --- SatNo [1/4] Identification number of galilean
satellite (1)
3- 19 A17 "date" Obs.Date Mean observation date (YYYY/MM/DD.dddddd)
21- 22 I2 h RAh Right ascension (J2000.0) (2)
24- 25 I2 min RAm Right ascension (J2000.0) (2)
27- 32 F6.3 s RAs Right ascension (J2000.0) (2)
34 A1 --- DE- Declination sign (J2000.0) (2)
35- 36 I2 deg DEd Declination (J2000.0) (2)
38- 39 I2 arcmin DEm Declination (J2000.0) (2)
41- 45 F5.2 arcsec DEs Declination (J2000.0) (2)
47- 52 F6.3 arcsec (O-C)RA (O-C) residual in right ascension (3)
54- 59 F6.3 arcsec (O-C)DE (O-C) residual in declination (3)
61- 65 F5.3 arcsec e_(O-C)RA Error of mean O-C in right ascension
67- 71 F5.3 arcsec e_(O-C)DE Error of mean O-C in declination
73- 77 F5.3 arcsec s_(O-C)RA Standard deviation of O-C in right ascension
79- 83 F5.3 arcsec s_(O-C)DE Standard deviation of O-C in declination
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Note (1): Satellite number as follows:
1 = Io
2 = Europa
3 = Ganymede
4 = Callisto
Note (2): topocentric equatorial coordinates of Galilean satellites, J2000.0.
Note (3): "Observed-Calculated" residuals by web-sever "MULTI-SAT", calculated
from ephemerides within the INPOP13C and V.Lainey-V.2.0|V1.1 theories
-------------------------------------------------------------------------------
Byte-by-byte Description of file: satsatdt.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Sats Idenficiation numbers of galilean
satellites (1)
4- 20 A17 "date" Obs.Date Mean observation date (YYYY/MM/DD.dddddd)
22- 29 F8.3 arcsec dRAs Differential Right ascension (J2000.0) (2)
31- 38 F8.3 arcsec dDEs Differential Declination (J2000.0) (2)
40- 45 F6.3 arcsec (O-C)RA (O-C) residual in right ascension (3)
47- 52 F6.3 arcsec (O-C)DE (O-C) residual in declination (3)
54- 58 F5.3 arcsec e_(O-C)RA Error of mean O-C in right ascension
60- 64 F5.3 arcsec e_(O-C)DE Error of mean O-C in declination
66- 70 F5.3 arcsec s_(O-C)RA Standard deviation of O-C in right ascension
72- 76 F5.3 arcsec s_(O-C)DE Standard deviation of O-C in declination
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Note (1): Identification numbers of satellites which observations were used for
deriving differential mutual satellites coordinates relative to each other.
Note (2): Differential coordinates of Galilean satellites (J2000.0) relative
each other.
Note (3): "Observed-Calculated" residuals by web-sever "MULTI-SAT", calculated
from ephemerides within the INPOP13C and V.Lainey-V.2.0|V1.1 theories
-------------------------------------------------------------------------------
Byte-by-byte Description of file: jovedat.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Sats Idenficiation numbers of galilean
satellites (1)
6- 22 A17 "date" Obs.Date Mean observation date UTC (YYYY/MM/DD.dddddd)
24- 25 I2 h RAh Jupiter right ascension (ICRS, J2000.0) (2)
27- 28 I2 min RAm Jupiter right ascension (ICRS, J2000.0) (2)
30- 35 F6.3 s RAs Jupiter right ascension (ICRS, J2000.0) (2)
37 A1 --- DE- Jupiter declination sign (ICRS, J2000.0) (2)
38- 39 I2 deg DEd Jupiter declination (ICRS, J2000.0) (2)
41- 42 I2 arcmin DEm Jupiter declination (ICRS, J2000.0) (2)
44- 48 F5.2 arcsec DEs Jupiter declination (ICRS, J2000.0) (2)
50- 55 F6.3 arcsec (O-C)RA (O-C) residual in right ascension (3)
57- 62 F6.3 arcsec (O-C)DE (O-C) residual in declination (3)
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Note (1): Identification numbers of satellites which observations were used for
deriving positions of Jupiter.
Note (2): topocentric positions of Jupiter obtained from observations of
galilean satellites and its Jove-centric ephemerides by "MULTI-SAT" service,
2000.0 (http://Infm1.sai.msu.ru/neb/nss/nssephmr.htm) by Emelyanov N.V.
Note (3): "Observed-Calculated" residuals by web-sever "MULTI-SAT" (INPOP13C).
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Acknowledgements:
Natalia Narizhnaya, nnat(at)gao.spb.ru, Narizhnaya.nat(at)yandex.ru
References:
Izmailov I.S., Izmccd software for astrometric processing of numerical images
of the celestial objects, 2005, http://iznccd.puldb.ru/izmccdrus
Narizhnaya N.V.,Observations of the Galilean Satellites of UJupiter with
Pulkovo Normal Astrograph during 2009-2011, Solar System Reserch,2015,V.49,
No.6, pp.383-390
(End) Natalia Narizhnaya [GAO, Russia], Patricia Vannier [CDS] 24-May-2017