Table 4: Parameters of shock excitation models.
Object $v_{\rm s}$ $n_{\rm H}^{a}$ Age Radiation field

km s^-1 cm^-3 yr

HH72A 31 10⁴ 185 Yes

HH26A 52 10⁴ 70 Yes

HH320A 41 10⁴ 475 No

HH25C¹ 45 10⁴ >260 Yes

HH25C² 27 10⁵ >680 Yes

**Table 4:** Parameters of shock excitation models.
Object	$v_{\rm s}$	$n_{\rm H}^{a}$	Age	Radiation field
	km s^-1	cm^-3	yr
HH72A	31	10⁴	185	Yes
HH26A	52	10⁴	70	Yes
HH320A	41	10⁴	475	No
HH25C¹	45	10⁴	>260	Yes
HH25C²	27	10⁵	>680	Yes

Notes: ^a $n_{\rm H} = n$ (H) + 2n(H₂).
^1,2Models 1 and 2 of HH25C.

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