• MPC Preparation (Info)
  • NEAObs: NEA Observation Planning Aid

    Use the form below to prepare a list of NEAs suitable for observation according to user-specified criteria that are to be selected from the options below.

    You must enable cookies in your browser if you wish the system to remember the values you enter below.

    If you choose to set a cookie note that cookies are set only when you "Produce Object List" (we do not use Javascript to set cookies!).

    Note that if you specify the R.A. limits with signed values, the values are interpreted as the specified range centered on opposition. Otherwise, the R.A. limits are interpreted as absolute. The Decl. limits are always absolute.

    If you wish to report the non-functioning of (or errors in) this service, please use this feedback form.

    If the form seems to be not working for you, confirm that the default form returns some objects. If it does and you have problems when you try and fill in the form with your own values, be sure to report what values you are entering into the form.

    Observing date option:

    Planned date of observation : UT

    Observability options:

    RA range = to

    Decl. range = to

    Magnitude range = to V

    Motion range = to

    Solar elong. = to deg

    Lower galactic latitude limit = deg

    Uncertainty options:

    Current uncertainty = +/- to arcseconds

    Consider uncertainties

    Only show objects not seen in more than days

    Object type options:

    VIs PHAs Atens Apollos Amors

    Object status options:

    Numbered objects
    Multiple-opposition unnumbered objects
    Current opposition 1-opp unnumbered objects
    Previous opposition 1-opp unnumbered objects

    Ignore objects that are brightening at solar elongations greater than deg. and that are currently brighter than V

    Don't display labels in object list

    Result sorting options:

    Sort selected objects by in order

    MPES options:

    Observatory code =

    Number of ephemeris dates = Ephemeris interval =

    Ephemeris units: days hours minutes seconds

    Display positions in: truncated sexagesimal or full sexagesimal or decimal units

    Total motion and direction
    Separate R.A. and Decl. coordinate motions
    Separate R.A. and Decl. sky motions
    Display motions as: "/sec "/min "/hr deg/day

    Return 1-line MPC format elements

    Cookie option:

    Remember these settings