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Messier Object Cross Reference Table:

Messier Objects are well known "objects to avoid" as compiled by Charles Messier (to avoid confusion with comets). These objects are viewable through any modest telescope. However, several catalogs have been compiled since which result in several catalog designations for one object. For example, there are:

  • Messier Catalog Designation - "M"
  • New General Catalog Designation - "NGC"
  • Index Catalog Designation - "IC"
  • Caldwell Object Designation - "C"
  • A Common Name

This does not include catalog for other 'exotic' objects like pulsars, quasars and gamma ray bursts - which all have their own designation.

The New General Catalog was initially compiled by Astronomer J.L.E. Dreyer to catalog all non-stellar objects with the first catalog published in 1864. Since then there have been numerous supplements. The SEDS website has a good online searchable catalog of NGC/IC objects. The Index Catalog (IC) is simply a compliment - an index - to the New General Catalog.

The Caldwell Catalog is an object list compiled by British Astronomer Sir Patrick Alfred Caldwell-Moore. We know him as the Royal Astronomer Patrick Moore. This object list is 109 objects that encompass both Northern and Southern Hemispheres. It is the "modern" Messier Catalog for amateur astronomers that seek deep sky delights that are both challenging and rewarding; however there are no Messier listings in the Caldwell Catalog.

The table below does not contain all Caldwell, NGC, or IC objects but gives all the designations to our list of Messier Objects. An additional listing is the column "Finest NGC Object" list, a list compiled by Alan Dyer (a 'competitive' list to the Caldwell Catalog). While there are no Caldwell or Finest NGC counterparts to the Messier Objects, the table is filled in for completeness (and so you do not have to search the web to see if there are counterpart entries):

Back to Images: M1 to M24M25 to M51M52 to M75M76 to M96M97 to M110 | The Complete List

Messier Catalog Number: Object Type: Common Name: Caldwell Object Number: Finest NGC Object (Yes/No): NGC/IC Catalog Number:
M1 Supernova Remnant The Crab Nebula No Listing No NGC 1952
M2 Globular Cluster   No Listing No NGC 7089
M3 Globular Cluster   No Listing No NGC 5272
M4 Globular Cluster The Cat's Eye No Listing No NGC 6121
M5 Globular Cluster   No Listing No NGC 5904
M6 Open Cluster The Butterfly Cluster No Listing No NGC 6405
M7 Open Cluster Ptolemy's Cluster No Listing No NGC 6475
M8 Diffuse Nebula The Lagoon Nebula No Listing No NGC 6523
M9 Globular Cluster   No Listing No NGC 6333
M10 Globular Cluster   No Listing No NGC 6254
M11 Open Cluster The Wild Duck Cluster No Listing No NGC 6705
M12 Globular Cluster Gumball Cluster No Listing No NGC 6218
M13 Globular Cluster Great Hercules Globular Cluster No Listing No NGC 6205
M14 Globular Cluster   No Listing No NGC 6402
M15 Globular Cluster Great Pegasus Cluster No Listing No NGC 7078
M16 Emission Nebula Eagle Nebula No Listing No NGC 6611
M17 Diffuse Nebula Omega - Horseshoe - Swan No Listing No NGC 6618
M18 Open Cluster Black Swan No Listing No NGC 6613
M19 Globular Cluster   No Listing No NGC 6273
M20 Diffuse Nebula The Trifid Nebula No Listing No NGC 6514
M21 Open Cluster   No Listing No NGC 6531
M22 Globular Cluster Great Sagittarius Cluster No Listing No NGC 6656
M23 Open Cluster   No Listing No NGC 6494
M24 Star Cloud Milky Way Patch No Listing No NGC 6603
M25 Open Cluster   No Listing No (NGC 4725 is, but that is a galaxy) IC 4725
M26 Open Cluster   No Listing No NGC 6694
M27 Planetary Nebula The Dumbbell Nebula No Listing No NGC 6853
M28 Globular Cluster   No Listing No NGC 6626
M29 Open Cluster   No Listing No NGC 6913
M30 Globular Cluster   No Listing No NGC 7099
M31 Spiral Galaxy The Andromeda Galaxy No Listing No NGC 224
M32 Elliptical Galaxy Satellite Galaxy of M31 No Listing No NGC 221
M33 Spiral Galaxy The Triangulum Galaxy No Listing No NGC 598
M34 Open Cluster   No Listing No NGC 1039
M35 Open Cluster   No Listing No NGC 2168
M36 Open Cluster   No Listing No NGC 1960
M37 Open Cluster   No Listing No NGC 2099
M38 Open Cluster   No Listing No NGC 1912
M39 Open Cluster   No Listing No NGC 7092
M40 Double-Star Double-Star WNC4 - Winnecke 4 No Listing No N/A
M41 Open Cluster   No Listing No NGC 2287
M42 Diffuse Nebula The Great Orion Nebula No Listing No NGC 1976
M43 Diffuse Nebula de Mariran's Nebula (part of Orion Nebula) No Listing No NGC 1982
M44 Open Cluster Praesepe, the Beehive Cluster No Listing No NGC 2632
M45 Open Cluster Subaru, The Pleiades - The Seven Sisters No Listing No No listing
M46 Open Cluster   No Listing No NGC 2437
M47 Open Cluster   No Listing No NGC 2422 / NGC 2478 (same object)
M48 Open Cluster   No Listing No NGC 2548
M49 Elliptical Galaxy   No Listing No NGC 4472
M50 Open Cluster   No Listing No NGC 2323
M51 Spiral Galaxy The Whirlpool Galaxy No Listing No NGC 5194
M52 Open Cluster The Scorpion No Listing No NGC 7654
M53 Globular Cluster   No Listing No NGC 5024
M54 Globular Cluster   No Listing No NGC 6715
M55 Globular Cluster   No Listing No NGC 6809
M56 Globular Cluster   No Listing No NGC 6779
M57 Planetary Nebula The Ring Nebula No Listing No NGC 6720
M58 Spiral Galaxy   No Listing No NGC 4579
M59 Elliptical Galaxy   No Listing No NGC 4621
M60 Elliptical Galaxy   No Listing No NGC 4649
M61 Spiral Galaxy Swelling Spiral No Listing No NGC 4303
M62 Globular Cluster Flickering Globular No Listing No NGC 6266
M63 Spiral Galaxy Sunflower Galaxy No Listing No NGC 5055
M64 Spiral Galaxy Black Eye Galaxy No Listing No NGC 4826
M65 Spiral Galaxy Leo Triplet (along with M66 and NGC 3628) No Listing No NGC 3623
M66 Spiral Galaxy Leo Triplet (along with M65 and NGC 3628) No Listing No NGC 3627
M67 Open Cluster King Cobra No Listing No NGC 2682
M68 Globular Cluster   No Listing No NGC 4590
M69 Globular Cluster   No Listing No NGC 6637
M70 Globular Cluster   No Listing No NGC 6681
M71 Globular Cluster   No Listing No NGC 6838
M72 Globular Cluster   No Listing No NGC 6981
M73 Open Cluster   No Listing No NGC 6994
M74 Spiral Galaxy The Phantom No Listing No NGC 628
M75 Globular Cluster   No Listing No NGC 6864
M76 Planetary Nebula The Little Dumbbell - Cork - Butterfly No Listing No NGC 650 and NGC 651
M77 Spiral Galaxy Cetus A No Listing No NGC 1068
M78 Reflection Nebula   No Listing No NGC 2068
M79 Globular Cluster   No Listing No NGC 1904
M80 Globular Cluster   No Listing No NGC 6093
M81 Spiral Galaxy Bode's Galaxy (Nebula) No Listing No NGC 3031
M82 Irregular Galaxy The Cigar Galaxy No Listing No NGC 3034
M83 Spiral Galaxy The Southern Pinwheel Galaxy No Listing No NGC 5236
M84 Lenticular Galaxy   No Listing No NGC 4374
M85 Lenticular Galaxy   No Listing No NGC 4382
M86 Lenticular Galaxy   No Listing No NGC 4406
M87 Elliptical Galaxy Virgo A No Listing No NGC 4486
M88 Spiral Galaxy   No Listing No NGC 4501
M89 Elliptical Galaxy   No Listing No NGC 4552
M90 Spiral Galaxy   No Listing No NGC 4569
M91 Spiral Galaxy Missing Messier Object No Listing No NGC 4548
M92 Globular Cluster   No Listing No NGC 6341
M93 Open Cluster   No Listing No NGC 2447
M94 Spiral Galaxy Croc's Eye Galaxy No Listing No NGC 4736
M95 Spiral Galaxy   No Listing No NGC 3351
M96 Spiral Galaxy   No Listing No NGC 3368
M97 Planetary Nebula The Owl Nebula No Listing No NGC 3587
M98 Spiral Galaxy   No Listing No NGC 4192
M99 Spiral Galaxy St. Katherine's Wheel No Listing No NGC 4254
M100 Spiral Galaxy The Mirror of M99 No Listing No NGC 4321
M101 Spiral Galaxy The Pinwheel Galaxy No Listing No NGC 5457
M102 Lenticular Galaxy Spindle Galaxy No Listing NGC 5907 (on the list) is near M102 NGC 5866
M103 Open Cluster   No Listing No NGC 581
M104 Spiral Galaxy The Sombrero Galaxy No Listing No NGC 4594
M105 Elliptical Galaxy   No Listing No NGC 3379
M106 Spiral Galaxy   No Listing No NGC 4258
M107 Globular Cluster   No Listing No NGC 6171
M108 Spiral Galaxy   No Listing No NGC 3556
M109 Spiral Galaxy   No Listing No NGC 3992
M110 Elliptical Galaxy Satellite Galaxy of M31 No Listing No NGC 205

Back to Images: M1 to M24M25 to M51M52 to M75M76 to M96M97 to M110 | The Complete List

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