!  File:  1088C.PROP
!  Database:  PEPDB
!  Date:  16-FEB-1994:01:12:23

coverpage:

  title_1:         SMALL SATELLITES IN THE URANIAN SYSTEM
    sci_cat:       SOLAR SYSTEM
    sci_subcat:    SATELLITES, RINGS
    proposal_for:  GTO/HSP
    pi_fname:      ROBERT
    pi_mi:         C.
    pi_lname:      BLESS
    pi_inst:       WISCONSIN, UNIVERSITY OF
    pi_country:    USA
    pi_phone:      608-262-1715
    keywords_1:    URANIAN SATELLITES, SATELLITE ORIBTS
    hours_pri:     7.00
    num_pri:       1
    hsp:           X
! end of coverpage

abstract:

    line_1:        The Voyager investigation of the Saturnian and Jovian ring systems revealed the
    line_2:        intimate relationship between the structure of the rings and small satellites
    line_3:        that orbit within or near the rings. The long term stability of ring systems is
    line_4:        now thought to depend upon a chain of resonances that stabilizes the ring
    line_5:        particle orbits by linking them--though resonances--to small, nearby moons,
    line_6:        whose orbits in turn are stabilized through resonance links to the large, outer
    line_7:        satellites. Establishing these connections depends upon obtaining precise
    line_8:        orbits for the small satellites. To explain the structure of the Uranian
    line_9:        system, most are expecting Voyager to discover several shepherd satellites
    line_10:       within the ring system, and perhaps some in orbit between mirauda and the
    line_11:       epsilon ring. These satellites would have magnitudes within the range +20-+25
    line_12:       and have proven--so far--to be undetectable from Earth. We propose a series of
    line_13:       exposures with one of the cameras to establish the orbits of those satellites
    line_14:       that have important connections with the ring dynamics.

!
! end of abstract

general_form_proposers:

  lname:           ROBINSON
    fname:         EDWARD
    mi:            L.
    inst:          TEXAS, UNIVERSITY OF
    country:       USA

!

  lname:           BLESS
    fname:         ROBERT
    mi:            C.
    inst:          WISCONSIN, UNIVERSITY OF
    country:       USA

!

  lname:           VAN CITTERS
    fname:         G.
    mi:            W.
    inst:          NATIONAL SCIENCE FOUNDATION
    country:       USA

!

  lname:           DOLAN
    fname:         JOSEPH
    mi:            F.
    inst:          NASA, GODDARD SPACE FLIGHT CENTER
    country:       USA

!

  lname:           WHITE
    fname:         RICHARD
    mi:            L.
    inst:          SPACE TELESCOPE SCIENCE INSTITUTE
    country:       USA

!

  lname:           ELLIOT
    fname:         JAMES
    mi:            L.
    inst:          MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        We propose a series of about 20 exposures (with the FOC or WFC/PC, as
    line_2:        appropriate), each about 20 minutes to establish the orbits of several small
    line_3:        satellites. Cycle 1, depending on observations by the wide-field camera team.

!

  question:        4
    section:       1
    line_1:        These satellites are undetectabel with ground-based observations.

!

  question:        7
    section:       1
    line_1:        Data will be reduced and anlyzed at MIT with the VAX 11-750 belonging to the
    line_2:        planetary astronomy group.

!

  question:        10
    section:       1
    line_1:        TBD

!

  question:        13
    section:       1
    line_1:        A series of exposures with one of the cameras would be used to establish
    line_2:        precise orbits of any possible shepherd satellites of uranus that might be
    line_3:        previously discovered by Voyager, HST, or ground-based observations. This
    line_4:        program would be second epoch observations of the satellites, to be intiated
    line_5:        after the wide-field camera team has completed their search for new satellites.
    line_6:        The orbits of these satellites would have important connections with ring
    line_7:        dynamics and long term stability of the ring system.

!
!end of general form text

general_form_address:

  lname:           BLESS
    fname:         ROBERT
    mi:            C.
    category:      PI
    inst:          UNIVERSITY OF WISCONSIN
    addr_1:        DEPARTMENT OF ASTRONOMY
    city:          MADISON
    state:         WI
    zip:           53706
    country:       USA

!

  lname:           ELLIOT
    fname:         JAMES
    mi:            L.
    category:      CON
    inst:          MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    addr_1:        BLDG. 54-422
    city:          CAMBRIDGE
    state:         MA
    zip:           02139
    country:       USA
    phone:         617-253-6308
    telex:         921473 MIT CAM

!
! end of general_form_address records

! No fixed target records found

! No solar system records found

generic_targets:

  targnum_1:       1
    name_1:        URANUS-SAT
    descr_1:       SMALL SATELLITE OF URANUS
    criteria_1:    SMALL SATELLITE OF URANUS THAT HAS DYNAMICAL INFLUENCE ON THE
    criteria_2:    RINGS
    fluxnum_1:     1
    fluxval_1:     V=23+/-3

!
! end of generic targets

exposure_logsheet:

    linenum:       1.000
    targname:      URANUS-SAT
    config:        WFC
    opmode:        IMAGE
    aperture:      ALL-ND
    sp_element:    F606W
    num_exp:       3
    time_per_exp:  20M
    s_to_n:        20
    fluxnum_1:     1
    priority:      1
    req_1:         CYCLE 2/1-3;

!

    linenum:       2.000
    targname:      ^
    config:        ^
    opmode:        ^
    aperture:      ^
    sp_element:    ^
    num_exp:       6
    time_per_exp:  ^
    s_to_n:        ^
    fluxnum_1:     ^
    priority:      2

!

    linenum:       3.000
    targname:      ^
    config:        ^
    opmode:        ^
    aperture:      ^
    sp_element:    ^
    num_exp:       12
    time_per_exp:  ^
    s_to_n:        ^
    fluxnum_1:     ^
    priority:      3
    comment_1:     REPEAT EXP.1 3 TIMES, EXP.2 6 TIMES,
    comment_2:     EXP.3 12 TIMES.

!
! end of exposure logsheet

! No scan data records found