Light Echoes From Red Supergiant Star V838 Monocerotis - December 2002
The star is ~20,000 light-years (~6 kiloparsecs) away.
The top image is 82 arcseconds (7.8 light-years or 2.4 parsecs) wide.
These data are from the HST program 10392: K. Noll, H. Bond, C. Christian, L. Frattare, F. Hamilton, Z. Levay, M. Mutchler, and T. Royle (STScI).
F435W (B), F606W (V), F814W (I)
NASA, ESA and H.E. Bond (STScI)
Blue: F435W (B)
Green: F606W (V)
Red: F814W (I)