The presence of a brown dwarf companion to our Sun has long been suspected, but until recently there has been no direct evidence that could convince astronomers. Originally, only circumstantial evidence (newspaper articles, ancient artifacts and even extraterrestrial alien contacts) have support its existence. This web site has proposed its mass and orbital parameters based on multi-source data. Apparently, it forms comet swarms with a 3:2 orbital period resonant (Vulcan - 4969 years):(comet - 3312.7 years) ratio. Now, the computation of giant comet CR105's average orbital period has shown it to be statistically certain that it is in just such a predicted resonant relationship. This is the elusive astronomical evidence that reveals Vulcan's existence and is tantamount to discovering Vulcan.
CR105 is one of about 19 'Scatter Disk' objects whose aphelion is between Vulcan's perihelion (134 AU) and aphelion (448 AU). Actually, it is a member of the even more exclusive Extended Scattered Disk club containing only a few objects whose perihelion too far away from Neptune to be influenced by it. Including Vulcan's mass (about 141 - 165 Earth masses) and orbit in the solar system, CR105's average period is 3319.3 years (3316.7 years without Vulcan) implying Vulcan's period to be 4979.0 years. There may be at least three other Vulcan related planetoids. A similar average period of these has not been evaluated, but the initial values are within the range expected when Vulcan is included in computer simulations. Specifically, 2001 FP185 (3433.7 years) and 2002 GB332 (3234.2 years) appear to be in a similar 3:2 resonance and 1999 DP8 (1246 years) in a 4:1 resonance with Vulcan.
Long ago, giant comets were drawn into similar 3:2 Sun grazing orbits. They crumbled rounding the Sun producing comet swarms. Some impacted Earth causing weather changes. However, CR105 offers a simple and uncluttered way to verify Vulcan's period because it employs simple astronomical measurements rather than arguable geo-climatological data. Furthermore, the known planets never distort its orbit because it never comes near them. CR105's period is so close to the predicted 3:2 resonate period (overlap probability 77% - 83%) that they are definitely related. Astounding implications accompany this discovery.