The three systems detected prior to 1994 each have a drawback, with Gamma Cephei b being unconfirmed until 2002; while the PSR B1257+12 planets orbit a pulsar.
DH Tauri b and GQ Lupi b were confirmed as companions within about three month in 2005.
May be a sub-brown dwarf instead of a planet, depending on formation mechanism and definitions chosen.
[22] Any of the earlier Direct imaging exoplanets, e.g. 2M1207 b, DH Tauri b or GQ Lupi b have spatially resolved spectroscopic observations, but the objects need confirmation to be of planetary origin.
[38][39][40] Possibly a "Saharan dust event over the La Palma observatory in 2008 August".