  We give results of a low-resolution optical spectroscopic study of the bright
nebulous stars conforming the tight stellar trapezium embedded in
IRAS06548-0815, of the exciting star of IRAS06547-0810, and of the stars
associated with reflection nebulae (R-or N-stars) NJ065703.0-081421,
NJ065714.1-081016, IRAS06548-0815 D and IRAS06548-0815 G, all objects scarcely
observed and apparently pertaining to the dark cloud LDN 1655. Our results
given here combined with the corresponding 2MASS near infrared photometry
enables us to estimate a photometric distance to LDN1655 of 1.9 kpc and to
locate the trapezium stars on the (log Lstar/Lsun, logTeff) or HR diagram in an
attempt to disclose about their true nature. The spectroscopy of IRAS06548-0815
revealed two classic T Tauri, two Herbig Ae/Be stars, four weak-line T Tauri
stars, and two probable lithium-rich stars. Additionally, we found that the
R-star IRAS06547-0810 is excited by a single B1(V) star, that IRAS06548-0815 D
is excited by a SpT. B2/B3(V) star, NJ065703.0-081421 and NJ065714.1-081016 are
excited by a B3/B4(V) emission star and an A6(V) star, respectively. The
brightest near infrared source of the trapezium, IRS1, has an infrared
luminosity comparable to a highly reddened O8(V) star (Av of 29m). The second
brightest near infrared source of the trapezium, IRAS06548-0815 C is,
optically, a single classical T Tauri star of spectral type K4/K5, but is a
resolved binary in the 2MASSKs band, both components being of about the same
brightness.
