Table 8: Parameters representing the final model.
Parameter Value

Ionizing source

Model atmosphere Rauch

$T_{\rm eff}$ 171 500 K

Log g 6.2

Luminosity 6800 $L_{{\odot}}$

+

Cosmic ray background ${\rm H}^0$ ionization rate = $2.5 \times 10^{-17}~S^{-1}$

${\rm H}_2$ ionization rate = $5 \times 10^{-17}~S^{-1}$

Nebular lobe

Density n(H) See Fig. 2

Abundance H cm He cm C cm N

12.000cm 11.121cm 8.875cm 9.130

O cm Ne cm Na cm Mg

8.898 cm 8.188cm 6.556 cm 7.292

Si cm S cm Cl cm Ar

7.079 cm 7.146cm 5.570 cm 6.820

Fe

6.079

Size $7{\hbox{$^{\prime\prime}$ }}$ (radial extent)

Distance 3.20 kpc

Dust Grains Silicates of radius $0.010~\mu$ m (Fig. 2)

inner radius 1.436e16 cm ( $\sim$ 0.00465 pc, 0.3 $^{\prime \prime }$ )

outer radius 3.351e17 cm ( $\sim$ 0.108 pc, 7 $^{\prime \prime }$ )

Filling factor 1.0

**Table 8:** Parameters representing the final model.
Parameter	Value
Ionizing source
Model atmosphere	Rauch
$T_{\rm eff}$	171 500 K
Log g	6.2
Luminosity	6800 $L_{{\odot}}$
+
Cosmic ray background	${\rm H}^0$ ionization rate = $2.5 \times 10^{-17}~S^{-1}$
	${\rm H}_2$ ionization rate = $5 \times 10^{-17}~S^{-1}$

Nebular lobe
Density n(H)	See Fig. 2
Abundance	H cm He cm C cm N
	12.000cm 11.121cm 8.875cm 9.130
	O cm Ne cm Na cm Mg
	8.898 cm 8.188cm 6.556 cm 7.292
	Si cm S cm Cl cm Ar
	7.079 cm 7.146cm 5.570 cm 6.820
	Fe
	6.079
Size	$7{\hbox{$^{\prime\prime}$ }}$ (radial extent)
Distance	3.20 kpc
Dust Grains	Silicates of radius $0.010~\mu$ m (Fig. 2)
inner radius	1.436e16 cm ( $\sim$ 0.00465 pc, 0.3 $^{\prime \prime }$ )
outer radius	3.351e17 cm ( $\sim$ 0.108 pc, 7 $^{\prime \prime }$ )
Filling factor	1.0

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