For free or paid subscribers we offer a 1 yr. Custom Ephemeris for any of the 1.4 million discovered objects in our Solar System. These include the MPC-numbered objects (720,476 as of this post, not including comet fragments) as well as the unnumbered objects (683,515, not including comet fragments as well). A payment link will be sent by email.
This is a preview for C/2023 A3 (Tsuchinshan-ATLAS), a special bargain 2-yr. Daily Noon Greenwich Ephemeris for the cost of one year! We also have the discovery chart with 734 objects calculated available to paid subscribers.
The two lists below include: SPK-ID, Object Full Name, IAU Name and Orbital Period (years). We recommend selecting the SPK-ID for ordering an ephemeris. Only 3.5% (24,919) of the numbered objects are IAU-named, for which we also have the current list. Most astrologers are only interested in the named ones, but every month the WGSBN is releasing new ones! I’ve been using dozens of unnumbered objects over the years, some of which have been numbered later. A few of those have been named, e.g., 15760 Albion (1992QB1), the FIRST object beyond Neptune to be discovered in 1992 after Pluto, “the granddaddy of us all,” as Jane Luu, the co-discoverer, described him to me back in 2017. As the first cubewano discovered, what astrologer wouldn’t want to track that one from the start?
The Daily Noon or Midnight Greenwich Ephemeris includes: Date, UT, JD Number, AU, RA, DEC, LAT, LON and Rx status. The retrieved results are real-time JPL Horizons API-generated, based upon the latest orbital solutions. For newly-discovered objects like comets, for which the orbits are not well-defined (CC=7-9), the solutions may change from week to week depending on the new observations that become available. Almost all the named objects have well-defined orbital solutions, but objects still get updated - even Chiron who was discovered 48 years ago!
Swiss Ephemeris (SE)-based software products, e.g., Solar Fire, Sirius, Planetdance, Astrolog, etc., do NOT have folder access to the MPC-unnumbered objects, except for a handful, and the files are rarely updated by Astrodienst. We advise to just ignore them! Of the MPC-numbered ones, the user is required to have the asteroid file(s) in an appropriate folder in order to access them with a program, and even many of those haven’t been updated in 10+ yrs! For research astrologers and others who care about accuracy and precision, use only real-time data from JPL Horizons.
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Excel files of Lists:
(Click on: File/Save as/Download a copy) - much quicker!
MPC-numbered list – 720,476
MPC-unnumbered list – 683,515
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