FYI -- Schwarzschild radius ~ 1000 AU ~ 139 light-hours ~ 5.8 light-days ~ 1 light-week. So, this black hole is bigger than our solar system almost out to the Oort cloud. http://hyperphysics.phy-astr.gsu.edu/hbase/Astro/blkhol.html http://arxiv.org/pdf/1511.08502v2.pdf How Big Can a Black Hole Grow? Andrew King Department of Physics & Astronomy, University of Leicester, Leicester LE1 7RH UK Astronomical Institute Anton Pannekoek, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, The Netherlands 10 December 2015 ABSTRACT I show that there is a physical limit to the mass of a black hole, above which it cannot grow through luminous accretion of gas, and so cannot appear as a quasar or active galactic nucleus. The limit is Mmax ~ 5×10^10 Msun for typical parameters, but can reach Mmax ~ 2.7×10^11 Msun in extreme cases (e.g. maximal prograde spin). The largest black hole masses so far found are close to but below the limit. The Eddington luminosity ~ 6.5 × 10^48 ergs^-1 corresponding to Mmax is remarkably close to the largest AGN bolometric luminosity so far observed.