urn:nasa:pds:compil-comet:nuc_properties:best_radii
1.0
Properties of Comet Nuclei - Best Radii
1.11.0.0
Product_Observational
Barnes, T.F.; M.F. A'Hearn; and L. Kolokolova
2019
This file contains best-available radii values for cometary nuclei.
2015-08-10
1.0
Migration from PDS3
2012-02-15Z
Science
Derived
Cometary Nuclei Radii
Small Bodies
Physical Properties
None
Other Investigation
urn:nasa:pds:context:investigation:individual.none
data_to_investigation
Literature Search
Literature Search
Multiple Cometary Nuclei
Comet
Marsden, B.G. and G.V. Williams, "Catalogue of Cometary Orbits 2008, 17th Edition",
Minor Planet Center/Central Bureaufor Astronomical Telegrams, Cambridge, MA, 2008.
Tisserand invariant parameter with respect to Jupiter.
Rounded value calculated using most recent data as reported in
Marsden and Williams (2008). Value only to be used as an estimation.
best_radii.tab
10332
164
0
164
This table contains the currently 'best' available value, according to
Michael A'Hearn, of the spherical volume radius (in the case of existing
shape models) or the rough maximum cross section radius or another
'best value' radius for each comet's nucleus.
Carriage-Return Line-Feed
7
0
63
Periodic Number
1
1
ASCII_String
3
%3s
Periodic number of the Comet. A blank has been used to represent those which do not have a Periodic Number.
Comet Type
2
4
ASCII_String
1
%-1s
Single letter indicating comet type. P = periodic,
C = non-periodic, D = defunct (believed to have disintegrated).
Comet Name
3
6
ASCII_String
23
%-23s
Name of the Comet.
Discovery ID
4
31
ASCII_String
10
%-10s
Discovery ID assigned by the MPC. These are provided
only for non-periodic comets. This may be an asteroid ID if the comet
was not obviously active when first discovered.
A blank has been used to represent those which do not have a Discovery ID.
Comet Class
5
43
ASCII_String
3
%-3s
Dynamic classification of the comet; either 'EC', for
ecliptic comets; or 'NIC' for nearly-isotropic comets.
If T[j] is the Tisserand parameter with respect to Jupiter, then
ecliptic comets (EC) are those with 2 <= T[j] <= 3 and a period of
less than about 20 year. Nearly isotropic comets (NIC) are those
with T[j] < 2.
Tisserand Jupiter
6
47
ASCII_Real
6
%6.2f
Tisserand invariant parameter with respect to Jupiter.
Rounded value calculated using most recent data as reported in
Marsden and Williams (2008). Value only to be used as an estimation.
-99.99
Best Radius
7
57
ASCII_Real
5
%5.2f
Kilometer
Spherical radius of comet nuclues' volume.
-.99