Cassini's Titan Tour

Prime INMS Flybys

Trajectory Segments:

Close Up On Titan Trajectories-

The trajectories are consistent with spice kernel 040622BP_SCPSE_04122_08222.

Cassini trajectory data in TITAN Solar Orbital (TSO) coordinates in units of TITAN radii and degrees. TITAN centered coordinate system, Z is parallel to the upward normal of the solar orbital plane of Saturn, the X-Z plane contains the TITAN-Sun line, & Y completes the right-handed set and points opposite to Saturn's motion about the Sun. R is the TITAN -> S/C distance, Zenith angle is the 3-body (S/C - TITAN -Sun) and Local time is the projection of the 3-body angle into the orbital plane, measured counterclockwise the TITAN anti-solar line. Rt = 2575 km.

• March 31, 2005 Titan T5(xy view) Titan T5 (3d view) Titan T5 (yz view)
• October 11, 2006 Titan T17 (xy view) Titan T17 (3d view) Titan T17 (yz view)
• September 23, 2006 Titan T18 (xy view) Titan T18 (3d view) Titan T18 (yz view)
• February 27, 2006 Titan T21 (xy view) Titan T21 (3d view) Titan T21 (yz view)
• July 2, 2006 Titan T25 (xy view) Titan T25 (3d view) Titan T25 (yz view)
• June 13, 2007 Titan T32 (xy view) Titan T32 (3d view) Titan T32 (yz view)
• December 28, 2006 Titan T36 (xy view) Titan T36 (3d view) Titan T36 (yz view)
• January 13, 2007 Titan T37 (xy view) Titan T37 (3d view) Titan T37 (yz view)
• February 22, 2007 Titan T39 (xy view) Titan T39 (3d view) Titan T39 (yz view)
• April 10, 2007 Titan T42 (xy view) Titan T42 (3d view) Titan T42 (yz view)

Extended View On Titan Trajectories-

The trajectories are consistent with spice kernel 040622BP_SCPSE_04122_08222.

Cassini trajectory data in Saturn Solar System or Saturn Solar Equatorial (SSEq) (AKA as Saturn Geographic) coordinates in units of Saturn radii and degrees. Saturn centered coordinate system, Z along spin axis, X-Z plane contains the Sun, and Y completes the right-handed set. R is the Saturn -> S/C distance. Saturn -> S/C distance. (Rs = 62,268km).

• Titan T5(xy view) Titan T5 (3d view) Titan T5 (yz view)
• Titan T17 (xy view) Titan T17 (3d view) Titan T17 (yz view)
• Titan T18 (xy view) Titan T18 (3d view) Titan T18 (yz view)
• Titan T21 (xy view) Titan T21 (3d view) Titan T21 (yz view)
• Titan T25 (xy view) Titan T25 (3d view) Titan T25 (yz view)
• Titan T32 (xy view) Titan T32 (3d view) Titan T32 (yz view)
• Titan T36 (xy view) Titan T36 (3d view) Titan T36 (yz view)
• Titan T37 (xy view) Titan T37 (3d view) Titan T37 (yz view)
• Titan T39 (xy view) Titan T39 (3d view) Titan T39 (yz view)
• Titan T42 (xy view) Titan T42 (3d view) Titan T42 (yz view)

Titan Tori Density Plot:

• H.Todd Smith1,Robert E. Johnson1, Marykutty Michael1, Valery Shematovich2 and Edward Sittler3

(Multiple peaks are due to another pass through)

• Titan Neutral Nitrogen Tori T5
• Titan Neutral Nitrogen Tori T17
• Titan Neutral Nitrogen Tori T18
• Titan Neutral Nitrogen Tori T21
• Titan Neutral Nitrogen Tori T25
• Titan Neutral Nitrogen Tori T32
• Titan Neutral Nitrogen Tori T36
• Titan Neutral Nitrogen Tori T37
• Titan Neutral Nitrogen Tori T39
• Titan Neutral Nitrogen Tori T42

Titan's Exosphere Density Plots:

(Sharp edges in the plots are due to the models limits. Altitude range is 1600-8000km.)

CH4- T5 T17 T18 T21 T25 T32 T36 T37 T39 T42

H- T5 T17 T18 T21 T25 T32 T36 T37 T39 T42

H2- T5 T17 T18 T21 T25 T32 T36 T37 T39 T42

N- T5 T17 T18 T21 T25 T32 T36 T37 T39 T42

N2- T5 T17 T18 T21 T25 T32 T36 T37 T39 T42

Titan's Atmosphere Density Plots:

(The ion models assume the ionospheric density on the nightside is equal to the terminator ion density. It may be much lower, or may transition to a magnetospheric/ram source ionosphere.)

Fox-Yelle Model of Neutrals

• Fox-Yelle model (personal communication, 1997) also see (GRL 24, p 2179, 1997)

Paper- Linked Here

T21- N2, CH4, C2H2 C2H4, C2H6, C4H2 H, H2, C CH, CH2, 1CH2 CH3, C2H, C2H3 C2H5, C4H3, N N2D, NH, NH2 NH3, CN, HCN H2CN, CNN, CHCN C2N2, HC2N2, C3N C2HCN, H2C3N, CH3CN METAM, C4N2, C2H3CN C2H5CN, H2O, O CO

T25- N2, CH4, C2H2 C2H4, C2H6, C4H2 H, H2, C CH, CH2, 1CH2 CH3, C2H, C2H3 C2H5, C4H3, N N2D, NH, NH2 NH3, CN, HCN H2CN, CNN, CHCN C2N2, HC2N2, C3N C2HCN, H2C3N, CH3CN METAM, C4N2, C2H3CN C2H5CN, H2O, O CO

T32- N2, CH4, C2H2 C2H4, C2H6, C4H2 H, H2, C CH, CH2, 1CH2 CH3, C2H, C2H3 C2H5, C4H3, N N2D, NH, NH2 NH3, CN, HCN H2CN, CNN, CHCN C2N2, HC2N2, C3N C2HCN, H2C3N, CH3CN METAM, C4N2, C2H3CN C2H5CN, H2O, O CO

T36- N2, CH4, C2H2 C2H4, C2H6, C4H2 H, H2, C CH, CH2, 1CH2 CH3, C2H, C2H3 C2H5, C4H3, N N2D, NH, NH2 NH3, CN, HCN H2CN, CNN, CHCN C2N2, HC2N2, C3N C2HCN, H2C3N, CH3CN METAM, C4N2, C2H3CN C2H5CN, H2O, O CO

T37- N2, CH4, C2H2 C2H4, C2H6, C4H2 H, H2, C CH, CH2, 1CH2 CH3, C2H, C2H3 C2H5, C4H3, N N2D, NH, NH2 NH3, CN, HCN H2CN, CNN, CHCN C2N2, HC2N2, C3N C2HCN, H2C3N, CH3CN METAM, C4N2, C2H3CN C2H5CN, H2O, O CO

T39- N2, CH4, C2H2 C2H4, C2H6, C4H2 H, H2, C CH, CH2, 1CH2 CH3, C2H, C2H3 C2H5, C4H3, N N2D, NH, NH2 NH3, CN, HCN H2CN, CNN, CHCN C2N2, HC2N2, C3N C2HCN, H2C3N, CH3CN METAM, C4N2, C2H3CN C2H5CN, H2O, O CO

T42- N2, CH4, C2H2 C2H4, C2H6, C4H2 H, H2, C CH, CH2, 1CH2 CH3, C2H, C2H3 C2H5, C4H3, N N2D, NH, NH2 NH3, CN, HCN H2CN, CNN, CHCN C2N2, HC2N2, C3N C2HCN, H2C3N, CH3CN METAM, C4N2, C2H3CN C2H5CN, H2O, O (no densities to be had) CO

Yung Model of Neutrals

• Yung et al. model (ApJ Suppl. v55, p465, 1984)

Paper- Linked Here

T5- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T17- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T18- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T21- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T25- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T18- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T36- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T37- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T39- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

T42- N2, CH4, H2 HCN, C2H2, C2H4 C2H6, N, NH H

Fox-Yelle Model of Ions

• Fox-Yelle model (personal communication 1997)

(Sharp edges in the plots are due to the models limits. Altitude range is 600-3000km.)

T5- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T17- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T18- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T21- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T25- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T32- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T36- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T37- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T39- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

T42- H+, H2+, H3+ C+, CH+, CH2+ CH3+, CH4+, CH5+ C2+, C2H+, C2H2+ C2H3+,, C2H4+, C2H5+ C2H6+, C2H7+, C4H3+ CXHY+, N+, NH+ NH2+, NH3+, NH4+ HCN+, HCNH+, CN+ C2N+, C2NZ+, N2+ N2H+, O+, CO+ HCO+, NO+, Ne

Keller-Cravens Model of Ions with out Ram at Night

• Keller, Cravens, Gan model (JGR v97, p12117, 1992)

(This model is SZA dependent. It also gives the electron temperature for a single nominal SZA only (at this time). The electron temperature is used here to compute thermal pressure assuming Ti=2Te. altitude range is 725-3015 km, except for Te and pressure which go to 2525 km only.)




T5- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

T17- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

T18- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

T21- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4 CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

T25- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ (no densities to be had) C2H3+, C2H2+, C2H+ (no densities to be had) Z+ (no densities to be had)

T32- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

T36- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

T37- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

T39- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

T42- ne, H2CN+, CxHy+ C2H5+, CH5+, H3+ H2+, H+, NH+ N2H+, N2+, N+ CN+, HCN+, CH4+ CH3+, CH2+, CH+ C+, C2H6+, C2H4+ C2H3+, C2H2+, C2H+ Z+

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