Secular brightness curves of 272 comets | Astronomy & Astrophysics (A&A)

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Table 8

Statistics of global curves k₁ and m₁ samples.

Pre-perihelion global curves
	k₁ statistics			m₁ statistics

	New	Intermediate	Old	New	Intermediate	Old

N	85	71	42	85	71	42
Mean ± SE	13.40 ± 0.67	14.03 ± 0.71	15.51 ± 0.87	7.53 ± 0.55	8.02 ± 0.58	10.23 ± 0.68
25%	9.55	9.74	10.86	5.59	6.69	7.57
Median	12.30	12.75	14.84	8.28	8.96	11.58
75%	15.26	16.82	19.41	10.57	11.08	13.42

Pre-perihelion global curves
	k₁ statistics			m₁ statistics
	New	Intermediate	Old	New	Intermediate	Old

N	54	58	36	54	58	36
Mean ± SE	13.33 ± 1.22	13.96 ± 1.07	13.31 ± 0.85	7.33 ± 1.15	8.93 ± 0.54	11.35 ± 0.54
25%	9.35	10.03	9.53	6.90	6.79	9.68
Median	11.54	12.66	13.21	8.75	9.71	11.57
75%	14.41	15.38	16.03	10.48	11.51	13.43

Notes. Statistics of global curve k₁ and m₁ samples grouped by Oort group (new, intermediate and old) and orbital arc (pre- and post-perihelion). N is the number of comets. Mean, standard error on the mean (SE), median and 25% and 75% quartiles are in units of mag/log au.

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