A catalog of observed  Defining our ``best estimates''

The adopted nuclear magnitudes and radii

From the analysis of the 138 plots shown in Section  we assign nuclear magnitudes to 105 JF comets, out of which 9 belong to QC 1, 18 to QC 2, 37 to QC 3, and 41 to QC 4. We discarded 33 JF comets, for which we were not able to adopt or even approach a reasonable estimate of a nuclear magnitude, either because there are very few data (in many cases a single nuclear magnitude), or because a major coma contamination in the reported magnitudes is strongly suspected. The discarded JF comets are shown in Table 3.
 
 

Table 3: Discarded JF comets

85P/Boethin	140P/Bowell-Skiff	108P/Ciffréo
54P/de Vico-Swift	79P/du Toit-Hartley	D/1978R1 (Haneda-Campos)
D/1952B1 (Harrington-Wilson)	P/1987Q3 (Helin)	127P/Holt-Olmstead
59P/Kearns-Kwee	P/1997B1 (Kobayashi)	104P/Kowal 2
P/1996R2 (Lagerkvist)	P/1997T3 (Lagerkvist-Carsenty)	93P/Lovas 1
P/1986W1 (Lovas 2)	115P/Maury	18D/Perrine-Mrkos
80P/Peters-Hartley	83P/Russell 1	92P/Sanguin
106P/Schuster	102P/Shoemaker 1	P/1986A1 (Shoemaker 3)
121P/Shoemaker-Holt 2	129P/Shoemaker-Levy 3	P/1991T1 (Shoemaker-Levy 5)
D/1977C1 (Skiff-Kosai)	69P/Taylor	D/1978C2 (Tritton)
D/1960S1 (van Houten)	63P/Wild 1	114P/Wiseman-Skiff

 

There are in addition 27 JF comets discovered through 1997 with no plots, because they do not have any reported nuclear magnitudes. The JF comets of Marsden & Williams' ([1997]) catalogue that appear neither in Table 3 nor in the plots of Section are shown in Table 4.
 
 

Table 4: JF comets without observed nuclear magnitudes

D/1884O1 (Barnard 1)	D/1892T1 (Barnard 3)	3D/Biela
D/1819W1 (Blanpain)	D/1886K1 (Brooks 1)	5D/Brorsen
D/1894F1 (Denning)	72P/Denning-Fujikawa	66P/Du Toit
34D/Gale	P/1988V1 (Ge-Wang)	D/1896R2 (Giacobini)
D/1766G1 (Helfenzrieder)	D/1984H1 (Kowal-Mrkos)	D/1770L1 (Lexell)
P/1994P1-A (Machholz 2)	P/1992G3 (Mueller 4)	25D/Neujmin 2
D/1783W1 (Pigott)	D/1984W1 (Shoemaker 2)	P/1990V1 (Shoemaker-Levy 1)
P/1991V1 (Shoemaker-Levy 6)	D/1993F2 (Shoemaker-Levy 9)	D/1918W1 (Schorr)
D/1895Q1 (Swift)	11D/Tempel-Swift	107P/Wilson-Harrington

 

Table 5 contains the list of our 105 JF comets with assigned nuclear magnitudes.
We present:

1. name of the comet
2. perihelion distance (q)
3. largest heliocentric distance at which a nuclear magnitude was observed (r_max)
4. number of perihelion passages during which the comet was observed (N. pas.)
5. adopted absolute nuclear magnitude (H_N)
6. quality class (QC)
7. effective nuclear radius (R) assuming a geometric albedo p_v = 0.04.

 
 

Table 5: Absolute nuclear magnitudes and radii

Comet	q (AU)	rmax (AU)	N. pas.	HN	QC	R (km)
50P/Arend	1.821	2.50	4	15.2	4	3.0
49P/Arend-Rigaux	1.386	4.79	8	15.1	1	3.2
47P/Ashbrook-Jackson	2.311	5.33	7	15.3	1	2.9
19P/Borrelly	1.395	5.62	5	15.2	1	3.0
P/1992Q1 (Brewington)	1.601	3.26	1	16.8	4	1.5
16P/Brooks 2	1.950	2.66	5	16.5	3	1.7
87P/Bus	2.183	3.78	2	17.1	3	1.3
101P/Chernykh	2.568	4.17	1	15.9	3	2.2
67P/Churyumov-Gerasimenko	1.285	4.98	4	15.6	1	2.5
71P/Clark	1.560	4.01	4	17.1	2	1.3
32P/Comas-Sola	1.772	3.87	6	15.6	3	2.5
33P/Daniel	1.382	2.87	3	17.9	4	0.9
6P/D'Arrest	1.163	4.86	5	16.7	2	1.5
57P/Du-Toit-Neujmin-Delporte	1.305	3.29	1	16.6	4	1.6
2P/Encke	0.336	4.09	11	17.0	3	1.3
4P/Faye	1.692	4.41	7	15.9	2	2.2
15P/Finlay	0.998	3.65	3	17.9	4	0.9
37P/Forbes	1.528	3.59	5	17.6	3	1.0
90P/Gehrels 1	2.935	3.35	2	15.4	4	2.8
78P/Gehrels 2	2.348	3.70	3	16.0	3	2.1
82P/Gehrels 3	3.424	4.08	3	16.1	2	2.0
P/1997C1 (Gehrels)	3.565	5.45	1	15.8	3	2.3
21P/Giacobini-Zinner	0.931	4.83	7	17.7	2	1.0
84P/Giclas	1.627	2.18	2	16.9	4	1.4
26P/Grigg-Skjellerup	0.732	4.93	4	17.1	1	1.3
65P/Gunn	3.306	4.73	7	14.2	2	4.8
51P/Harrington	1.694	2.35	3	16.9	4	1.4
52P/Harrington-Abell	1.774	3.02	7	17.4	4	1.1
100P/Hartley 1	1.540	1.86	1	17.0	4	1.3
103P/Hartley 2	0.952	4.73	3	14.7	4	3.8
110P/Hartley 3	2.454	4.64	3	16.2	2	1.9
P/1993K2 (Helin-Lawrence)	3.090	5.02	1	14.3	4	4.6
117P/Helin-Roman-Alu 1	3.707	5.21	2	14.9	2	3.5
132P/Helin-Roman-Alu 2	1.930	1.97	1	17.8	4	0.9
111P/Helin-Roman-Crockett	3.470	4.54	2	16.7	3	1.5
17P/Holmes	2.141	3.25	5	16.1	3	2.0
45P/Honda-Mrkos-Pajdu$\breve{s}$áková	0.559	1.95	2	19.3	4	0.5
88P/Howell	1.916	3.29	4	17.4	3	1.1
58P/Jackson-Neujmin	1.463	2.06	3	18.7	4	0.6
P/1995A1 (Jedicke)	4.083	5.53	1	15.2	3	3.0
P/1996A1 (Jedicke)	4.055	6.52	1	14.1	2	5.0
48P/Johnson	2.248	3.98	6	15.9	2	2.2
68P/Klemola	1.763	3.87	3	15.9	3	2.2
75P/Kohoutek	1.568	3.82	3	16.3	3	1.8
70P/Kojima	1.631	3.77	3	17.3	3	1.2
22P/Kopff	1.699	4.72	9	16.3	2	1.8
99P/Kowal 1	4.660	6.12	2	14.2	3	4.8
134P/Kowal-Vávrová	2.609	3.70	1	16.9	3	1.4
P/1994A1 (Kushida)	1.367	2.55	1	17.3	3	1.2
P/1993X1 (Kushida-Muramatsu)	2.745	3.81	1	15.8	3	2.3
P/1997V1 (Larsen)	3.293	3.40	1	14.8	4	3.6
77P/Longmore	2.402	4.09	4	15.7	4	2.4
130P/McNaught-Hughes	2.125	4.00	2	16.5	3	1.7
97P/Metcalf-Brewington	1.631	3.67	1	17.0	4	1.3
P/1997G1 (Montani)	4.217	4.80	1	15.6	4	2.5
124P/Mrkos	1.411	3.58	2	16.6	2	1.6
120P/Mueller 1	2.747	3.15	2	18.1	3	0.8
131P/Mueller 2	2.083	2.44	1	18.2	4	0.8
136P/Mueller 3	2.998	3.38	2	16.2	4	1.9
P/1993W1 (Mueller 5)	4.250	4.95	1	16.0	4	2.1
28P/Neujmin 1	1.529	8.97	1	12.8	1	9.1
42P/Neujmin 3	2.042	2.52	3	18.7	4	0.6
39P/Oterma	3.389	4.54	2	12.8	4	9.1
119P/Parker-Hartley	3.026	4.18	2	15.6	4	2.5
7P/Pons-Winnecke	0.772	3.55	5	16.8	3	1.5
30P/Reinmuth 1	1.860	3.39	6	17.1	3	1.3
44P/Reinmuth 2	1.867	4.09	6	16.8	4	1.5
89P/Russell 2	2.159	3.07	2	17.4	3	1.1
91P/Russell 3	2.510	3.73	3	17.1	4	1.3
94P/Russell 4	2.125	3.54	2	16.2	3	1.9
24P/Schaumasse	1.226	2.75	4	18.0	4	0.8
29P/Schwassmann-Wachmann 1	5.495	7.26	4	12.0	2	13.2
31P/Schwassmann-Wachmann 2	2.090	4.59	7	15.1	1	3.2
73P/Schwassmann-Wachmann 3	1.011	3.03	2	17.7	4	1.0
61P/Shajn-Schaldach	2.234	2.84	3	17.5	3	1.1
P/1994J3 (Shoemaker 4)	2.944	3.14	1	15.0	4	3.3
128P/Shoemaker-Holt 1	3.053	3.77	2	16.1	4	2.0
137P/Shoemaker-Levy 2	1.844	4.84	2	15.3	2	2.9
118P/Shoemaker-Levy 4	2.019	3.96	1	16.5	3	1.7
138P/Shoemaker-Levy 7	1.630	1.75	2	18.0	4	0.8
135P/Shoemaker-Levy 8	2.711	4.14	2	16.8	3	1.5
105P/Singer-Brewster	1.955	3.02	2	17.7	4	1.0
56P/Slaughter-Burnham	2.544	3.66	3	16.7	3	1.5
74P/Smirnova-Chernykh	3.546	4.78	4	13.7	4	6.0
125P/Spacewatch	1.544	3.03	2	18.0	2	0.8
113P/Spitaler	1.816	2.25	1	17.4	4	1.1
64P/Swift-Gehrels	1.358	3.63	3	16.4	4	1.7
98P/Takamizawa	1.595	3.78	2	15.7	4	2.4
9P/Tempel 1	1.562	4.69	6	15.8	1	2.3
10P/Tempel 2	1.344	4.74	9	15.3	2	2.9
62P/Tsuchinshan 1	1.486	2.37	2	18.1	4	0.8
60P/Tsuchinshan 2	1.769	2.31	4	18.2	3	0.8
41P/Tuttle-Giacobini-Kresák	1.140	2.32	4	18.5	3	0.7
112P/Urata-Niijima	1.449	2.87	2	18.4	4	0.7
40P/Väisälä 1	1.762	3.03	3	16.7	3	1.5
53P/Van Biesbroeck	2.414	6.04	4	14.7	3	3.8
123P/West-Hartley	2.129	2.75	1	15.9	4	2.2
76P/West-Kohoutek-Ikemura	1.398	3.60	3	17.1	3	1.3
36P/Whipple	2.484	4.12	6	15.8	2	2.3
81P/Wild 2	1.491	4.42	2	15.9	3	2.2
86P/Wild 3	2.288	3.43	3	17.8	3	0.9
116P/Wild 4	1.989	4.14	1	14.9	3	3.5
46P/Wirtanen	1.635	4.62	4	18.4	1	0.7
14P/Wolf	1.572	3.14	6	17.0	4	1.3
43P/Wolf-Harrington	2.428	3.87	7	16.3	2	1.8

 

2000-03-07