Trigarium on February 27 and March 14, also celebrated for Mars, may have been held at the Trigarium as well, and possibly events for the "ludi tarentini", which became the Saecular Games. The area may, however, have been only a practice field for these events. An underground altar to the divine couple Dis Pater and Proserpina was located in the Tarentum, near or adjacent to the Trigarium. Dis was the Roman equivalent of the Greek god Plouton (Latinized as Pluto), who abducted Proserpina (Greek Persephone or Kore "the Maiden") in his chariot to the underworld to become his bride and queen.
90482 Orcus with the normal object naming procedures. Vanth was found at 0.25 arcsec from Orcus with magnitude difference of . Estimates made in 2009 by Mike Brown show that the apparent magnitude of Vanth is which is magnitudes fainter than Orcus. Assuming equal albedos this would mean a diameter of 280 km, or 2.9 times smaller than the primary. However, the dissimilar colors of Orcus (neutral) and Vanth (red) suggest that Vanth could have an albedo a factor of two lower than Orcus. Should Vanth have an albedo of only 0.12, Vanth could be as large as 380 km with Orcus