perhaps not exhaustive. In addition to the relatively low S/N of these lines, the moderate wavelength resolution is not sufficient to differentiate between the several possible identifications for each line.

The PNe spectra are separated into four groups that share common characteristics. These are recombination line-dominated, recombination line + 2 emission, 2 – dominated, and continuum-dominated. A fifth group of objects is included that contains two objects that were at one time classified as PNe, but are now generally regarded as being regions (M 1–78 and K 4–45; Acker et al.1992). We do not discuss these objects further, but include them for comparison. Within each group, the NGC objects are listed first, followed by the remaining PNe in alphanumeric order. The morphological classifications are given according to Balick (1987), unless otherwise noted.

 - line dominated
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The line emission in these PNe is dominated by lines of and . In the J-band, the Paschen $\beta$ () line is the most intense, with contributions from lines of , \[\], and . In the H band, the Brackett series of dominate, with emission at 1.7002  and \[\] emission at 1.6440   present in some PNe. In the K band, the brightest line is 