KPL/PCK In the absence of verifiable values to put in place for the body constants for the moons of Pluto, this kernel was prepared to accommodate basic calculations that are made possible by the SPICE toolkit. The values contained with this kernel will be replaced as better information is made available. The choices made for the constants were made by Hal Weaver and Olivier Barnouin in conjunction with the development of the Small Body Mapping Tool. The NAIF body ids of the moons of the Pluto system are repeated below as a benefit to the consumers of this kernel: CHARON 901 NIX 902 HYDRA 903 KERBEROS 904 STYX 905 Russell Turner Howard Taylor JHU/APL 2015-07-16 Temporary Frame definition for NIX to connect PCK and SPK data. The body id used was arbitrarily selected as 1500000. This is not visible generally and is only used to associate the specific frame with the source ephemeris and planetary constants. Expect this id to change once the project or the NAIF team release an updated frame definition for this body. \begindata FRAME_IAU_NIX = 1500000 FRAME_1500000_NAME = 'IAU_NIX' FRAME_1500000_CLASS = 2 FRAME_1500000_CLASS_ID = 902 FRAME_1500000_CENTER = 902 \begintext The following direction has been provided from Hal Weaver in an email to Olivier Barnouin and Howard Taylor on 2015-07-17 at 3pm EDT. As a first guess for the shape, you might choose body radii of 20 x 14 x 14 km, for both Nix and Hydra. As a placeholder for the pole direction, use a vector that points in the direction of Pluto's pole (despite the contrary evidence presented in today's SPM). As a placeholder for the rotational period, use 1.8 days for now. The values below have been computed with these intentions in mind. \begindata BODY902_RADII = ( 20. 14. 14. ) BODY902_POLE_RA = ( 132.993 0. 0. ) BODY902_POLE_DEC = ( -6.163 0. 0. ) BODY902_PM = ( 0. 200. 0. ) BODY902_LONG_AXIS = ( 0. ) \begintext Temporary Frame definition for HYDRA to connect PCK and SPK data. The body id used was arbitrarily selected as 1500001. This is not visible generally and is only used to associate the specific frame with the source ephemeris and planetary constants. Expect this id to change once the project or the NAIF team release an updated frame definition for this body. \begindata FRAME_IAU_HYDRA = 1500001 FRAME_1500001_NAME = 'IAU_HYDRA' FRAME_1500001_CLASS = 2 FRAME_1500001_CLASS_ID = 903 FRAME_1500001_CENTER = 903 \begintext \begindata BODY903_RADII = ( 20. 14. 14. ) BODY903_POLE_RA = ( 132.993 0. 0. ) BODY903_POLE_DEC = ( -6.163 0. 0. ) BODY903_PM = ( 0. 200. 0. ) BODY903_LONG_AXIS = ( 0. ) \begintext