Plots of Absolute Nuclear Magnitude (V(1,1,0))

vs

heliocentric distance (r)

 

Following we present plots of  the absolute nuclear magnitude (V(1,1,0)) vs the heliocentric distance (r) for the 220 comets for which data is available. The vertical lines indicate the perihelion and aphelion distances. The horizontal line corresponds to the adopted nuclear magnitude. Different symbols are assigned to selected observers and observational categories according to Table 2'. The observations are classified using the following groups:

• CCD - observations taken by professional astronomers using medium- and large-sized telescopes (1.5 m aperture or bigger) with CCDs.
• Roemer - E. Roemer and her collaborators' reports of nuclear magnitudes.
• Scotti nuclear - Observations by J. Scotti reported as nuclear magnitudes.
• Scotti total - J. Scotti's reports of total magnitudes, including those at $r \le 3$ AU.
• Lamy et al. - Observations by P. Lamy and his group made with the HST
• General - Nuclear reports by any other observer not included in the previous groups; most of the observers are amateur astronomers.
• Total - Reports of total magnitudes taken at r > 3 AU by any observer except J. Scotti.

 

Table 2': Symbols and codes used for data points

Observer	symbol	Code
	(pre - empty ; post - full)	pre / post
General	circle -	1 / 2
CCD	pentagon -	2 / 3
Roemer	upward triangle -	4 / 5
Scotti (nuclear)	diamond -	6 / 7
Scotti (total)	square -	10 / 11
Lamy et al.	downward triangle -	12 / 13
Total r > 3 AU	pre - cross -	8
	post - chicken-foot -	9

 

The plots

• Comets sorted by MPC number
• Pages including many comets In numerical order

 

  
 
2005-11-01