Skip to main content


    Johann Franz Encke Autograph Document Signed "J.F. Encke Prof." in Latin, one page, 6.5" x 3.75". His signature is incorporated in the title at top, "Commilitonibus honoratissinies/J.F. Encke Prof." Not translated but what Encke has written is related to astronomy, mentioning stars, Moon, Mars, Venus, and Jupiter. Johann Franz Encke (1791-1865) learned Latin while he was a student at the College at Hamburg, the Johanneum. Working at the observatory of Seeberg near Gotha, he discovered the orbit of a new comet which bears his name; he became director of the observatory in 1822. In 1835, Encke was appointed the first director of the observatory in Berlin. Two years later, he discovered a gap within a ring of Saturn now called the Encke gap. In 1851, Encke determined a new method of calculating planetary perturbations by means of rectangular coordinates. Four tiny holes in blank perimeter. Fine condition.

    Fees, Shipping, and Handling Description: Flat Material, Small (view shipping information)

    Sales Tax information  |  Terms and Conditions

    Bidding Guidelines and Bid Increments

    Glossary of Terms

    Auction Info

    Auction Dates
    February, 2008
    21st-22nd Thursday-Friday
    Bids + Registered Phone Bidders: 1
    Lot Tracking Activity: N/A
    Page Views: 683

    Buyer's Premium per Lot:
    19.5% of the successful bid (minimum $9) per lot.

    Sold for: Sign-in or Join (free & quick)

    Heritage membership

    Join Now - It's Free

    1. Past Auction Values (prices, photos, full descriptions, etc.)
    2. Bid online
    3. Free Collector newsletter
    4. Want List with instant e-mail notifications
    5. Reduced auction commissions when you resell your
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976
    Only 41 days left to consign to the 2018 June 20 Cartography Signature Auction !

    Learn about consigning with us

    I don’t often do testimonials but in this case I felt truly obligated to thank Heritage Auctions for the extremely professional job your organization did for me.
    Charlie K.,
    Pittsburgh, PA
    View More Testimonials receives more traffic than any other auction house website. (Source:

    Video tutorial

    Getting the most out of search

    Recent auctions

    2018 March 17 Western Americana & Texana Grand Format Auction - Dallas
    2018 March 17 Western Americana & Texana Grand Format Auction - Dallas
    REALIZED SO FAR $325,776