P/2008 Y12 = P/2014 K3 (SOHO) is a very interesting object. Unfortunately, interesting doesn't = easily observable.
P/2008 Y12 has only been observed for a day or two around its 2008 and 2014 perihelia. I'm not sure why it hasn't been given a number (like 321P/SOHO), perhaps SOHO comets require being observed at more than 2 (or 3) returns.
P/2008 Y12 is a member of the 'Machholz Complex'. This complex is made up of related objects that most likely originated from a single progenitor some time in the past. In addition to P/2008 Y12, the Machholz complex also consists of an asteroid (now 2003 EH1, but may have been an active comet in the past and observed as C/1490 Y1), lots of meteor showers (Quadrantids, daytime Arietids, Northern δ-Aquariids, Southern δ-Aquariids, November ι-Draconids, December α-Draconids, daytime λ-Taurids, θ-Carinids, κ-Velids) and other comets (96P/Machholz and all of the Marsden and Kracht comet groups). P/2008 Y12 has an orbit that closely matches the Southern δ-Aquariids meteors.
P/2008 Y12 has a perihelion distance of 0.065 AU. Since it has only been seen when at its closest to the Sun, we have no real idea how bright it is when further from the Sun. I have been seeing quite a few sites listing this comet as currently bright and observable. I believe that many are using the MPC magnitude parameters which are probably not valid. Astro-Vanbuitenen is probably closer to reality though even its much fainter current magnitude may be too bright. This is a good apparition and hopefully someone will observe it inbound to the Sun but it will likely require a large telescope + CCD though you never know.
While it may reach naked eye brightness, it will be near perihelion at that time and much too close (within a few degrees) to the Sun to be seen from the ground. Hopefully we'll be able to watch it in the SOHO coronagraphs.