The periapsis of 101 Helena, which has the epoch date of 31 December 2006, is 331683000.0 km.
Above the Veil, written by Garth Nix is available in hardcover and has the ISBN number 0-439-17685-9.
101 Helena | periapsis | 331683000.0 (kilometres) 101 Helena | epoch | 2006-12-31 Above the Veil | author | Garth Nix Above the Veil | isbn number | 0-439-17685-9 Above the Veil | media type | Hardcover