We present Hubble Space Telescope near-infrared camera and multiobject spec
trometer observations of the reflection nebulosity associated with the T Ta
uri star HH 30. The images show the scattered-light pattern characteristic
of a highly inclined, optically thick disk with a prominent dust lane whose
width decreases with increasing wavelength. The reflected nebulosity exhib
its a lateral asymmetry in the upper lobe on the opposite side to that repo
rted in previously published Wide Field Planetary Camera 2 images. The radi
ation transfer model that most closely reproduces the data has a flared acc
retion disk with dust grains larger than standard interstellar medium grain
s by a factor of approximately 2.1. A single hot spot on the stellar surfac
e provides the necessary asymmetry to fit the images and is consistent with
previous modeling of the light curve and images. Photometric analysis resu
lts in an estimated extinction of A(V) greater than or similar to 80; howev
er, since the photometry measures only scattered light rather than direct s
tellar flux, this a lower limit. The radiative transfer models require an e
xtinction of A(V) = 7900.