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I/152 Lick Jupiter-Voyager Reference Star Catalogue (Klemola+ 1978)
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Lick Jupiter-Voyager Reference Star Catalogue
Klemola A.R., Morabito L., Taraji H.
<Lick Obs., U. California, Santa Cruz. (1978)>
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ADC_Keywords: Positional data ; Zodiacal regions
Description:
The catalog was prepared for purposes of determining up-to-date,
reasonably accurate equatorial coordinates for reference stars in a
band of sky against which cameras of the Voyager spacecraft were
aligned for observations of Jovian satellites during the Jupiter
flyby. The catalog contains accurate equatorial coordinates for
equinox 1950.0, epoch 1978.27, photographic and visual magnitudes,
AGK3 identifications and proper motions for 4983 stars. All of the
reference stars are in the range 6h00m to 8h04m in right ascension
(1950), declination zones +16 to +23 degrees, and 8h31m to 8h57m,
zones +08 to +14 degrees. Mean errors of the positions are about 0.4
second of arc.
Introduction:
The Lick Jupiter-Voyager Reference Star Catalogue. Klemola et al. (1978)
was prepared for purposes of determining up-to-date, reasonably
accurate, equatorial coordinates for reference stars in a band of sky
against which cameras of the Voyager spacecraft were aligned for
observations of Jovian satellites during the Jupiter flyby. The
requirements were a surface density of three to four reference stars per
observation frame of 24 sq. arcmin. of the cameras - somewhat greater
than that provided by the AGK3 catalog (Dieckvoss et al. 1975) - and a
positional accuracy approximately 0.5. Visual magnitudes were also
required. The completed catalog contains 4983 stars in the right
ascension ranges 6h00m to 8h04m, declination zones +16 deg. to +23
deg., and 8h31m to 8h57m, declination zones +08 deg. to +14 deg.. Mean
errors of the positions, as derived from least squares solutions against
the AGK3 reference stars, are about 0.4"; however, individual residuals
are fairly numerous in the range 0.6" to 0.8" with some in the range
1.0" to 1.3" The accidental error of one measurement, as deduced from a
tabular histogram given in the original catalog publication (referenced
below), is about 0.11". Apparent photographic and visual magnitudes were
derived from iris photometer measurements, m(v). being approximated from
a derived color-index relation using the AGK3 reference stars. The
resulting magnitudes appear to have mean errors of at least 0.2 mag
while very blue and very red stars (C.I..le.0 mag, and C.I..ge.1.5,
respectively) are less certain. The magnitudes are considered to be only
approximate (residuals of approximately 0.5 mag are fairly common).
For additional information concerning the observations and reductions,
the original publication (available from A. R. Klemola) should be
consulted. A copy of this document should be transmitted to any
recipient of the machine-readable catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 56 4983 The catalogue
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See also:
I/125 : Combined Lick-Voyager Reference Star Catalogue (Dunham 1986)
I/153 : Lick Saturn-Voyager Reference Star Catalogue (Klemola+, 1979)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1-4 I4 --- Seq *[1/1402] Running star number
5-8 I4 --- plate Plate number
9-10 I2 h RAh *Right ascension (1950.0), Epoch=1978.27
11-12 I2 min RAm *Right ascension (1950.0) minutes
13-18 F6.3 s RAs *Right ascension (1950.0) seconds
19 A1 --- DE- *Sign of declination zone
20-21 I2 deg DEd *Declination (1950.0), Epoch=1978.27
22-23 I2 arcmin DEm *Declination (1950.0) arcminutes
24-28 F5.2 arcsec DEs *Declination (1950.0) arcseconds
29-33 F5.2 mag Pmag *? Photographic magnitude
34-38 F5.2 mag Vmag *Visual magnitude
39-46 A8 --- AGK3 AGK3 (catalog <I/69>) designation
47-51 F5.1 10mas/a pmRA *? Centennial Proper motion in RA
52-56 F5.1 10mas/a pmDE *? Centennial Proper motion in DE
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Note on Seq:
A running star number denoting the order in which stars were selected
for measurement on each plate.
Note on RAh, RAm, RAs, DE-, DEd, DEm, DEs:
Equatorial coordinates given for Equinox 1950, Epoch 1978.27
Note on Pmag:
Apparent photographic magnitude, m(pg), as determined from iris
photometry.
Note on Vmag:
Apparent visual magnitude, m(v), approximated from m(pg) and a derived
color-index relation using the AGK3 reference stars.
Note on pmRA, pmDE:
The centennial proper motions (pmRA, pmDE). These data are taken from
the AGK3 catalog. The proper motions in right ascension are given as
the great circle measures (pmRA*cos(declination)).
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Acknowledgments:
Appreciation is expressed to A. R. Klemola for providing the magnetic
tape of the catalog and for reviewing the modifications made to the
data. Dr. Klemola also kindly reviewed a draft copy of this document
before its completion and printing.
The work of W. M. (Bill) Owen, Jr., in correcting and updating the
earlier version of the catalog, is gratefully acknowledged, as are his
comments on the statistical accuracy of the positions and the revised
documentation.
References:
Dieckvoss W., Kox H., Guenther A., and Brosterhus E. 1975, AGK3.
Star catalogue of positions and proper motions north of -2.5 deg.
declination, derived from plates taken at Bergedorf and Bonn in the
years 1928-1932 and 1956-1963., Hamburger Sternwarte, Hamburg-Bergedorf.
(see catalogue <I/69>)
Klemola A. R. (Lick Obs.), Morabito L., and Taraji H. (Jet Propulsion
Lab.) 1978, Lick Jupiter-Voyager Reference Star Catalogue., Lick
Observatory, University of California, Santa Cruz.
Klemola A. R. (Lick Obs.), Morabito L., and Taraji H. (Jet Propulsion
Lab.) 1979, Lick Jupiter-Voyager Reference Star Catalogue., Lick
Observatory, University of California, Santa Cruz.
Lopez C. E. 1988, Pub. Astron. Soc. Pacific. 100, 1273. (1988PASP..100.1273L)
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(End) [ADC/SSDOO] 31-Aug-1995 (revised J.A. Watko [SSDOO/ADC] 26-Apr-1996)