NASA_IgnisDivineth

 == NASA PROJECT ==

$ ftp = ssd.jpl.nasa.gov


>EXACT< name search [SPACE sensitive]:
            Horizons> Vesta;     (or "ASTNAM = Vesta;" for faster s
            Horizons> DES=AN10*; (Objects whose designation contain
...             Horizons> 45;        (Numbered asteroid "45 Eugenia")
            Horizons> ;          (Enter your own osculating element



COMMANDS:
  Program information:
    MB .............. Show planet/natural­satellite (major­body) ID
    SB .............. Show small­body search­field names & meanings
    NEWS ............ Display program news (new capabilities, updat
    ?! .............. Extended help ('?' for brief help).



  Program controls:
    LIST ............ Toggle display of small­body match­parameter
    PAGE ............ Toggle screen paging (scrolling) on or off.
    EMAIL {X} ....... Set your email address to {X} for output deli
    TTY {R} {C}...... Check or reset screen size; "tty" or "tty 24
    X ............... Exit JPL on­line system (also "QUIT" or "EXIT
    ­ ............... Return to the previous prompt (back­up!).



  Storing format default settings:
    LOAD {macro} .... Load previously SAVED output­format {macro}.
    SAVE {macro} .... Save/replace output­format macro with current
    DELETE {macro} .. Delete previously saved output­format macro.



project NASA
  C       NAME ...... Asteroid OR comet name fragment
  C       DES ....... Object designation
  R       EPOCH ..... Julian Date of osculating elements
  R       CALEPO .... Calendar date of osc. elements; YYYYMM
  R       A ......... Semi­major axis (AU)
  R       EC ........ Eccentricity
  R       IN ........ Inclination of orbit plane (DEG) wrt e
  R       OM ........ Longitude of Ascending Node (DEG) wrt
  R       W ......... Argument of Perihelion (DEG) wrt eclip
  R       TP ........ Perihelion Julian Date
  R       CALTP ..... Perihelion calendar date; YYYYMMDD.fff
  R       MA ........ Mean anomaly (DEG)
  R       PER ....... Orbital period (YRS)
  R       RAD ....... Object radius (KM)
  R       GM ........ Object GM (KM^3/S^2), only a few are k
  R       QR ........ Perihelion distance (AU)
  R       ADIST ..... Aphelion distance (AU)
  R       ANGMOM .... Specific angular momentum (AU^2/DAY)
  R       N ......... Mean motion (DEG/DAY)
  R       DAN ....... Heliocentric dist. (AU) of ascending n
  R       DDN ....... Heliocentric dist. (AU) of descending
  R       L ......... Ecliptic longitude of perihelion (DEG)
  R       B ......... Ecliptic latitude of perihelion (DEG)
  I       NOBS ...... Number of astrometric determinations in solution



The next parameters are ASTEROID SPECIFIC. If one or more is used, the search
will conclude faster by examining asteroids only. For example, including
something like 'H > ­10;' will limit the search to asteroids only:



  C       ASTNAM .... Asteroid name fragment (designation if unnamed)
  R       B­V ....... B­V color (asteroid)
  R       H ......... Absolute magnitude parameter (asteroid)
  R       G ......... Magnitude slope parameter; can be < 0 (asteroid)
  R       ROTPER .... Rotational period, hrs (asteroid)
  R       ALBEDO .... Geometric albedo (asteroid)
  C       STYP ...... Spectral type, Tholen scheme (asteroid)



The next parameters are COMET SPECIFIC. If one or more is used, the search
will conclude faster by examining comets only. For example, including something
like "M1 > ­10;' will limit the search to comets only:
  C       COMNAM .... Comet name fragment (designation if unnamed)
  I       COMNUM .... Comet number
  R       M1 ........ Total absolute magnitude (comet)
  R       M2 ........ Nuclear absolute magnitude (comet)
  R       K1 ........ Total magnitude scaling factor (comet)
  R       K2 ........ Nuclear magnitude scaling factor (comet)
  R       PHCOF ..... Phase coefficient for k2=5 (comet)
  R       A1 ........ Radial non­grav accel (comet), 10^­8 AU/DAY^2
  R       A2 ........ Transverse non­grav accel (comet), 10^­8 AU/DAY^2
  R       A3 ........ Normal non­grav accel (comet), AU/d^2
  R       DT ........ Non­grav lag/delay parameter (comet), days.



  Only 1 of the 4 keywords 'ASTNAM', 'COMNAM', 'NAME', or 'DES' may
be specified on a given search.



Directives:
­­­­­­­­­­­
There are 3 directives that may be used to limit or control searches:



     Directive  Description
     ­­­­­­­­­  ­­­­­­­­­­­
     COM .....  Limit search to comets only
     AST .....  Limit search to asteroids only
     LIST ....  Display parameter values for matched objects. (This may be
                set as a default for all subsequent searches by typing "LIST"
                at the main system prompt, "Horizons>".)



For example,



    "A < 2.5; IN > 10; AST;"        match parameters against asteroids ONLY.
    "A < 2.5; IN > 10; AST; LIST;"  match AND display values of the parameters
telnet ssd.jpl.nasa.gov :6775
email: Jon.Giorgini@jpl.nasa.gov  /pub/ssd/