J/A+AS/146/73 Nuclear magnitudes of Jupiter family comets (Tancredi+, 2000)
A catalog of observed nuclear magnitudes of Jupiter family comets.
Tancredi G., Fernandez J.A., Rickman H., Licandro J.
<Astron. Astrophys. Suppl. Ser. 146, 73 (2000)>
=2000A&AS..146...73T 2000A&AS..146...73T
ADC_Keywords: Comets
Keywords: comets: general - catalogs - techniques: photometric
Abstract:
A catalog of a sample of 105 Jupiter family (JF) comets (defined as
those with Tisserand constants T>2 and orbital periods P<20yr) is
presented with our ``best estimates'' of their absolute nuclear
magnitudes HN=V(1,0,0). The catalog includes all the nuclear
magnitudes reported after 1950 until August 1998 that appear in the
International Comet Quarterly Archive of Cometary Photometric Data,
the Minor Planet Center (MPC) data base, IAU Circulars, International
Comet Quarterly, and a few papers devoted to some particular comets,
together with our own observations. Photometric data previous to 1990
have mainly been taken from the Comet Light Curve Catalogue (CLICC)
compiled by Kamel (1991, The comet light curve catalogue/atlas. I. The
compiled observations. Uppsala Univ. Reprocentralen HSC). Most
absolute nuclear magnitudes are found in the range 15-18, with no
magnitudes fainter than HN∼19.5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 60 105 Absolute nuclear magnitudes and radii
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See also:
VII/91 : IRAS Asteroid and Comet Survey (Veeder+ 1986)
J/A+AS/120/301 : Comae of six comets (Sanzovo+ 1996)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 30 A30 --- Name Name of the comet
32- 36 F5.3 AU q Perihelion distance
39- 42 F4.2 AU rmax Largest heliocentric distance at which a
nuclear magnitude was observed
44- 45 I2 --- Npas Number of perihelion passages during which
the comet was observed
48- 51 F4.1 mag HN Adopted absolute nuclear magnitude (1)
54 I1 --- q_HN [1/4] Quality class (2)
57- 60 F4.1 km R Effective nuclear radius assuming a
geometric albedo pv=0.04.
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Note (1): A nuclear magnitude corresponds to the total flux
coming from the solid nucleus of the comet.
Note (2): Quality classes:
1: These are our best nuclear magnitudes for which we have many
observations spread along a wide range of heliocentric distances
and from more than one observer. The uncertainty in the adopted
nuclear magnitude is less than or about ±0.3mag.
2: These are fairly good estimates based on several observations
spread throughout a wide range of r, or few observations but made
at very large r. The uncertainty is estimated to be between
~±0.3 and ±0.6mag.
3: These are estimates made at different r with a somewhat larger
scatter than for the previous class. The uncertainty should be
between ~±0.6 and ±1mag.
4: These are poor estimates, either because they rely upon old data,
or upon very few observations, or because the observations show a
large scatter. Some of them can only be considered as a lower
limit to the nuclear magnitude (i.e., the true magnitude of the
comet nucleus is fainter than the quoted value). The uncertainty
is generally well above +/1mag.
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History: Copied at http://www.fisica.edu.uy/~gonzalo/catalog/
(End) Patricia Bauer [CDS] 26-Jul-2000