I sent an email to question@simbad.u-strasbg.fr regarding use of applet Aladin generated sky plots. Pierre.Fernique@astro.unistra.fr stated, "There is absolutely no problem to use them for Wikipedia pages. A citation of Aladin would be appreciated."
Legend: blue oval - galaxy, red * - star, X - X-ray source, red diamond - IR object, blue triangle - HI region, red + - HII region, gammaBurst - gamma-ray burst source, HV Cld - high-velocity cloud, LMXB - low-mass X-ray binary, Pulsar - visual pulsar, QSO - quasar.
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{{Information |Description ={{en|1=Sky plot of all astronomical objects within the ±2° error circle of Centaurus XR-4. Credit: Aladin at SIMBAD.}} |Source =Me, using Aladin at SIMBAD, url=http://simbad.u-strasbg.fr/simbad/. |Author =M