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  2. Numismatic Guaranty Company - Wikipedia

    en.wikipedia.org/wiki/Numismatic_Guaranty_Company

    NGC Cert Lookup verifies all NGC-certified coins and helps combat holder counterfeiting. Using the label serial number, NGC will reveal a coin's date, denomination, grade, photo (if any), and pricing and Census info. NGC Coin Explorer lists key info about many coin issues, such as mintages and values. [15]

  3. List of stars in the New General Catalogue - Wikipedia

    en.wikipedia.org/wiki/List_of_stars_in_the_New...

    NGC 32: Asterism: John Herschel: Pegasus 00 h 11 m: 18° 47′ 14 [4] NGC 33: Double star John Herschel: Pisces: 00 h 11 m: 03° 40′ 15 [5] NGC 44: Double Star John Herschel: Andromeda 00 h 13 m: 31° 18′ 14.6 [6] NGC 46: Star Edward Cooper: Pisces 00 h 21.9 m: 22° 25′ 11.8 [7] NGC 82: Star Guillaume Bigourdan: Andromeda 00 h 21 m 17.5 s ...

  4. Certified Acceptance Corporation - Wikipedia

    en.wikipedia.org/wiki/Certified_Acceptance...

    CAC has evaluated over 650,000 certified coins with a value of over $2.9 billion. The company has over 400 dealer members and over 500 collector members. The firm's website maintains a free serial number verification service, which helps deter CAC sticker counterfeiting, and Population Report, which assists in determining coin rarity. [9] [10 ...

  5. Professional Coin Grading Service - Wikipedia

    en.wikipedia.org/wiki/Professional_Coin_Grading...

    Printed on the front of the blue paper insert is the coin's type, denomination, grade, attribution, pedigree (if any), serial number, Universal Product Code (UPC), and other pertinent information. [11] [12] First-generation PCGS coin holders are smaller and lack the raised stackable edges of later issues. Their insert was printed on plain white ...

  6. Category:NGC objects - Wikipedia

    en.wikipedia.org/wiki/Category:NGC_objects

    Articles with the NGC number in the title use [[Category:NGC objects|####]], dropping the NGC prefix, and using only the number. The number should be padded up to 4 digits using zeroes. Articles without the NGC number in the title use [[Category:NGC objects]]. A redirect containing the NGC number should also be added to the category, sorted as ...

  7. New General Catalogue - Wikipedia

    en.wikipedia.org/wiki/New_General_Catalogue

    Assembling the NGC was a challenge, as Dreyer had to deal with many contradictory and unclear reports made with a variety of telescopes with apertures ranging from 2 to 72 inches. While he did check some himself, the sheer number of objects meant Dreyer had to accept them as published by others for the purpose of his compilation.

  8. Caldwell catalogue - Wikipedia

    en.wikipedia.org/wiki/Caldwell_catalogue

    [1] [4] Entries in the catalogue are designated with a "C" and the catalogue number (1 to 109). Unlike objects in the Messier catalogue, which are listed roughly in the order of discovery by Messier and his colleagues, [ 5 ] the Caldwell catalogue is ordered by declination , with C1 being the most northerly and C109 being the most southerly ...

  9. Wikipedia : Naming conventions (astronomical objects)

    en.wikipedia.org/wiki/Wikipedia:Naming...

    The Messier object number (e.g. Messier 30) The New General Catalogue number (e.g. NGC 6872) Any relatively unusual catalog name that is widely used in general or professional literature and that is more commonly used than the IC or UGC number (e.g. Arp 220, Markarian 501) The Index Catalogue number (e.g. IC 1101)