Spectra of Planetary Nebula NGC 2440

It is computed and plotted in your browser by a Java program which reads a file containing a list of emission line wavelengths and their corresponding strenghts.

Note: This program generates deep 24 bit color plots, therefore you may need to increase the color depth of your system to view subtle details in these spectra.

There may be a small delay as each Applet loads its element emission line file and computes the spectra...

NGC 2440

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Here is a lower quality jpeg of the spectra:

Spectra in Two Parts:

from 4000 to 5500 Ångstroms

and from 5500 to 7000 Ångstroms

Images of NGC 2440 at different wavelengths ( from Zhang)
H alpha	[O III ]	[N II ]

Hubble Space Telescope Photo