The plotting of an Hipparcos light curve from the Internet is similar to the plotting of an ASAS-3 or ZTF light curve, both of which are explained in detail in this User Guide.  

The Plot light curve from Hipparcos dialog box consists of two sections: the upper one is labeled Star name, and allows to enter the Hipparcos Identifier (HIP), AAVSO VSX or SIMBAD name of the star to be plotted, or its (J2000.0) RA and Decl coordinates. Both values have to be separated with a semi-colon. RA and Decl need to be in sexagesimal format with values separated by spaces. So, a valid entry would be: 04 59 13.57; -69 35 43.3. Or its (J2000.0) RA and Decl coordinates, expressed in degrees and separated with a semi-colon. Example: 76.80654; -69.595361.

The fields in the Additional fields section are identical to the ones found in the ASAS-3 and ZTF descriptions.

Peranso uses the VizieR1 catalogue access tool to access the Hipparcos and Tycho Catalogues (ESA 1997) I/239/hip_main for its Internet light curve plotting. 

(1) CDS, Strasbourg, France (DOI : 10.26093/cds/vizier). The original description of the VizieR service was published in 2000, A&AS 143, 23