2013A&A...551A.129T

Query : 2013A&A...551A.129T

2013A&A...551A.129T - Astronomy and Astrophysics, volume 551A129-129 (2013/3-1)

Astrometric reduction of Cassini ISS images of the Saturnian satellites Mimas and Enceladus.

TAJEDDINE R., COOPER N.J., LAINEY V., CHARNOZ S. and MURRAY C.D.

Abstract (from CDS):

We provide astrometric observations of two of Saturn's main satellites, Mimas and Enceladus, using high resolution Cassini ISS Narrow Angle Camera images. We developed a simplified astrometric reduction model for Cassini ISS images as an alternative to the one proposed by the Jet Propulsion Labratory (JPL). The particular advantage of the new model is that it is easily invertible, with only marginal loss in accuracy. We also describe our new limb detection and fitting technique. We provide a total of 1790 Cassini-centred astrometric observations of Mimas and Enceladus, in right ascension (α) and declination (δ) in the International Celestial Reference Frame (ICRF). Mean residuals compared to JPL ephemerides SAT317 and SAT351 of about one kilometre for Mimas and few hundreds of metres for Enceladus were obtained, in αcosδ and δ, with a standard deviation of a few kilometres for both satellites. A frequency analysis of the residuals revealed some periodic variability in the right ascension for Mimas. An additional analysis of Mimas' mean longitude suggests that some short-period terms are missing in the TASS orbital model.

Abstract Copyright: ∼

Journal keyword(s): astrometry - planets and satellites: individual: Mimas - planets and satellites: individual: Enceladus - methods: observational

VizieR on-line data: <Available at CDS (J/A+A/551/A129): table4.dat>

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	NGC 2168	OpC	06 09 07.5	+24 20 15						~	604	0

Query : 2013A&A...551A.129T

Basic data :

NGC 2168 -- Open Cluster
Other object types:	`OpC (2013A&A,OCl)`, `Cl* (2020A&A,C,...)`, `As* (2019AJ,[KC2019])`
ICRS coord. (ep=J2000) :	`06 09 07.5 +24 20 15 (Optical) [ ] E 2023A&A...674A..37G`
FK4 coord. (ep=B1950 eq=1950) :	`06 06 03.5 +24 20 48 [ ]`
Gal coord. (ep=J2000) :	`186.6121 +02.2381 [ ]`
Proper motions mas/yr :	`2.2784 -2.9336 [0.0052 0.0050 90] B` `2018A&A...616A..10G`
Radial velocity / Redshift / cz :	`V(km/s) -6.37 [0.14] / z(spectroscopic) -0.000021 [0.000000] / cz -6.37 [0.14] (NIR) A 2019A&A...623A..80C`
Parallaxes (mas):	`1.1301 [0.0013] B` `2018A&A...616A..10G`
Angular size (arcmin):	`38.3 38.3 0 (Opt) D` `2020A&A...633A..99C`

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`M 35`	`NGC 2168`	`[KC2019] Theia 203`	`[KPS2012] MWSC 0754`
`C 0605+243`	`OCl 466.0`	`[KPR2004b] 87`

References (604 between 1850 and 2026) (Total 604)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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NGC 2168

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