• Preparing MPCs (Info)

  • The Distant Artificial Satellites Observation Page

    This page (formerly titled the Earth-Orbiting Space Junk Tracker Page) allows observers to get ephemerides for man-made objects in orbit around the earth (or a dynamical point associated with the earth) that have been (or could be) confused with natural objects.

    Astrometry of these objects should be reported to both obs@cfa.harvard.edu and pluto@projectpluto.com (with subject line = "ART SAT") in the normal format, with the designation beginning in column 1 and extending no further than column 12 (names that are longer than twelve characters should be truncated). Observations are published in the Distant Artificial Satellites Observation circular.

    Use the FeedBack form to make comments or report problems with this service.

    Select object(s) from the list of available objects:
    2011-037A (SPEKTR-R) Gaia
    2010-050B WIND
    ACE Geotail
    CXO (Chandra) 9O0DC57
    9U01FF6 IMP8
    1969-046F; Vela 5A/5B booster 1983-020A
    1983-020D SA82DAA
    TA29DCF UDA34A3
    TR93D0F UE2A938
    2013-070B 2015-007B

    Ephemeris options:

    Start date (YYYY MM DD.ddddd format, default is now)

    Make start date a multiple of the ephemeris interval

    For daily ephemerides, enter desired offset from 0h UT: hours

    Number of dates to output

    Ephemeris interval: 1 day 12 hours 6 hours 2 hours 1 hour 30 mins 10 mins 1 min

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

    Display motions as: "/sec, "/min, "/hr or °/day.

    Total motion and direction Separate R.A. and Decl. coordinate motions Separate R.A. and Decl. sky motions

    Suppress output if sun above local horizon

    Suppress output if object below local horizon

    Full output Brief output

    Select your viewing point:

    Geocentric Observatory code

    Longitude ° E, latitude °, altitude m.

    Longitudes and latitudes should be entered in decimal degrees.

    Note: When local circumstances are displayed, the azimuths are reckoned westwards from the south meridian.

    Sources of Data

    Ephemeris data used in this service may be obtained from:
    internal MPC calculations,
    the Satellite Situation Center,
    JPL's Horizons
    Bill Gray of Project Pluto
    and Dale Fink (WMAP Operations).

    This service is made possible by the
    Tamkin Foundation Computer Network