Oral title: GLIMPSE-C01: the most massive intermediate-age star cluster in the Galaxy

Oral abstract: The heavily obscured (Av~15) star cluster GLIMPSE-C01 has been the subject of 
several studies with a variety of conflicting results regarding its age, with estimates widely varying 
between 500 Myr up to 12 Gyr. Using deep FourStar JK data we reach for the first time the MSTO of 
the cluster, ruling out any ages below 1 Gyr, and placing it close to 5 Gyr. Structural parameters 
place the cluster mass slightly above 10^5 solar masses. This age/mass combination is unheard-of 
for the MW star clusters, but rather common in the Magellanic Clouds. Additionally, I will present first 
results about the cluster proper motion and orbit based on further FourStar data, plus the first 
abundances study using IGRINS high resolution NIR spectra. This aggregate dataset will tell us 
whether GLIMPSE-C01 is disc-borne of halo-borne cluster crossing the disc, together with exploring 
for the first time the age threshold for self-enrichment in our Galaxy, only studied in detail so far in 
star clusters in the MCs