A Guide of Messier difficulty ratings

 


Object Number Name Con RA Dec Mag Size Type PBRT Difficulty
      1 NGC 1952 Crab Nebula Tau 05:34.5 +22:01 8.4 6×4 SNR   Medium
      2 NGC 7089  Aqr 21:33.5 -00:49 6.5 13 GCL 16.6 3
      3 NGC 5272  CVn 13:42.2 +28:23 6.2 16 GCL 16.8 3
      4 NGC 6121  Sco 16:23.6 -26:32 5.6 26 GCL 18.0 Medium
      5 NGC 5904  Ser 15:18.6 +02:05 5.7 17 GCL 16.6 Easy
      6 NGC 6405 Butterfly Cluster Sco 17:40.1 -32:13 4.0 20 OCL   1
      7 NGC 6475 Ptolemy¹s Cluster Sco 17:53.9 -34:49 3.0 80 OCL   1
      8 NGC 6523 Lagoon Nebula Sgr 18:03.8 -24:23 5.0 50×30 C/N   Medium
      9 NGC 6333  Oph 17:19.2 -18:31 7.7 9.3 GCL 17.8 Medium
     10 NGC 6254  Oph 16:57.1 -04:06 6.6 15 GCL 17.9 Medium
     11 NGC 6705 Wild Duck Cluster Sct 18:51.1 -06:16 5.8 5.8 OCL   Easy
     12 NGC 6218  Oph 16:47.2 -01:57 6.7 6.7 GCL 18.5 Medium
     13 NGC 6205 Hercules Globular Cluster Her 16:41.7 +36:28 5.8 5.8 GCL 16.9 Easy
     14 NGC 6402  Oph 17:37.6 -03:15 7.6 7.6 GCL   Medium
     15 NGC 7078  Peg 21:30.0 +12:10 6.2 6.2 GCL 16.3 4
     16 NGC 6611 Eagle Nebula Cluster Ser 18:18.8 -13:47 6.0 6.0 C/N   Easy
     17 NGC 6618 Omega, Swan, Horseshoe Nebula Sgr 18:20.8 -16:11 6.0 6.0 NEB   Medium
     18 NGC 6613  Sgr 18:19.9 -17:08 6.9 6.9 OCL   Easy
     19 NGC 6273  Oph 17:02.6 -26:16 6.8 6.8 GCL 17.3 Easy
     20 NGC 6514 Trifid Nebula Sgr 18:02.3 -23:02 6.3 6.3 C/N   Medium
     21 NGC 6531  Sgr 18:04.6 -22:30 5.9 5.9 OCL   Easy
     22 NGC 6656  Sgr 18:36.4 -23:54 5.1 5.1 GCL 17.4 1
     23 NGC 6494  Sgr 17:56.8 -19:01 5.5 5.5 OCL   Easy
     24 NGC 6603 Milky Way Patch Sgr 18:16.9 -18:29 3.1 3.1 OTH   Easy
     25 IC 4725 Sgr 18:31.6 -19:15 4.6 4.6 OCL   Easy
     26 NGC 6694  Sct 18:45.2 -09:24 8.0 8.0 OCL   Easy
     27 NGC 6853 Dumbbell Nebula Vul 19:59.6 +22:43 7.3 8.0×5.7 PLN 18.4 Medium
     28 NGC 6626  Sgr 18:24.5 -24:52 6.8 11 GCL 17.0 Medium
     29 NGC 6913  Cyg 20:23.9 +38:32 7.0 7.0 OCL   4
     30 NGC 7099  Cap 21:40.4 -23:11 7.2 11 GCL 17.5 Medium
     31 NGC 224 Andromeda Galaxy And 00:42.7 +41:16 3.4 191×62 GAL 16.6 1
     32 NGC 221 Satellite of M31 And 00:42.7 +40:52 8.1 8.7×6.5 GAL 17.7 Medium
     33 NGC 598 Triangulum/Pinwheel Galaxy Tri 01:33.9 +30:39 5.7 71×42 GAL 20.1 5
     34 NGC 1039  Per 02:42.0 +42:47 5.2 35 OCL   3
     35 NGC 2168  Gem 06:08.9 +24:20 5.1 28 OCL   2
     36 NGC 1960  Aur 05:36.1 +34:08 6.0 12 OCL   2
     37 NGC 2099  Aur 05:52.4 +32:33 5.6 24 OCL   2
     38 NGC 1912  Aur 05:28.4 +35:50 6.4 21 OCL   3
     39 NGC 7092  Cyg 21:32.2 +48:26 4.6 32 OCL   2
     40 Winecke 4 UMa 12:22.3 +58:05 9.1 0.9 OTH   Easy
     41 NGC 2287  CMa 06:46.0 -20:46 4.5 38 OCL   2
     42 NGC 1976 Great Orion Nebula Ori 05:35.4 -05:27 4.0 40×35 C/N   1
     43 NGC 1982 de Mairan¹s Nebula Ori 05:35.6 -05:16 9.0 10 C/N   Medium
     44 NGC 2632 Beehive Cluster (Praesepe) Cnc 08:40.1 +19:59 3.1 95 OCL   1
     45 Pleiades, Subaru, Seven Sisters Tau 03:47.0 +24:07 1.2 100 OCL   1
     46 NGC 2437  Pup 07:41.8 -14:49 6.1 27 OCL   5
     47 NGC 2422  Pup 07:36.6 -14:30 4.4 30 OCL   2
     48 NGC 2548  Hya 08:13.8 -05:48 5.8 30 OCL   4
     49 NGC 4472  Vir 12:29.8 +08:00 8.4 10×8.3 GAL 18.7 Hard
     50 NGC 2323  Mon 07:02.8 -08:21 5.9 16 OCL   2
     51 NGC 5194 Whirlpool Galaxy CVn 13:29.9 +47:12 8.4 11×6.9 GAL 19.3 Medium
     52 NGC 7654  Cas 23:24.2 +61:35 6.9 13 OCL   5
     53 NGC 5024  Com 13:12.9 +18:10 7.6 13 GCL 17.9 Medium
     54 NGC 6715  Sgr 18:55.1 -30:29 7.6 9.1 GCL 16.9 Medium
     55 NGC 6809  Sgr 19:40.0 -30:58 6.3 19 GCL 19.0 Medium
     56 NGC 6779  Lyr 19:16.6 +30:11 8.3 7.1 GCL 18.7 Medium
     57 NGC 6720 Ring Nebula Lyr 18:53.6 +33:02 8.8 1.4×1.0 PLN 17.8 Easy
     58 NGC 4579  Vir 12:37.7 +11:49 9.7 5.9×4.7 GAL 19.4 Hard
     59 NGC 4621  Vir 12:42.0 +11:39 9.6 5.4×3.7 GAL 19.4 Hard
     60 NGC 4649  Vir 12:43.7 +11:33 8.8 7.4×6.0 GAL 18.8 Medium
     61 NGC 4303  Vir 12:21.9 +04:28 9.7 6.5×5.8 GAL 19.9 Hard
     62 NGC 6266  Oph 17:01.2 -30:07 6.5 14 GCL 16.6 Medium
     63 NGC 5055 Sunflower Galaxy CVn 13:15.8 +42:02 8.6 13×7.2 GAL 19.3 Hard
     64 NGC 4826 Blackeye Galaxy Com 12:56.7 +21:41 8.5 10×5.4 GAL 18.9 Medium
     65 NGC 3623  Leo 11:18.9 +13:05 9.3 9.8×2.9 GAL 19.3 Medium
     66 NGC 3627  Leo 11:20.2 +12:59 8.9 9.1×4.2 GAL 19.0 Medium
     67 NGC 2682  Cnc 08:51.6 +11:49 6.9 25 OCL   2
     68 NGC 4590  Hya 12:39.5 -26:45 7.8 12 GCL 18.9 Hard
     69 NGC 6637  Sgr 18:31.4 -32:21 7.6 7.1 GCL 17.5 Medium
     70 NGC 6681  Sgr 18:43.2 -32:18 7.9 7.8 GCL 17.8 Medium
     71 NGC 6838  Sge 19:53.8 +18:47 8.2 7.2 GCL 19.0 Hard
     72 NGC 6981 Aqr 20:53.5 -12:32 9.3 5.9 GCL 19.3 Hard
     73 NGC 6994  Group of 4 stars Aqr 20:59.1 -12:38 9.6 1.0 OTH   Easy
     74 NGC 628 Psc 01:36.7 +15:47 9.4 11×9.6 GAL 20.5 Hard
     75 NGC 6864  Sgr 20:06.1 -21:55 8.5 6.0 GCL 17.8 Medium
     76 NGC 650 Little Dumbbell, Cork, Butterfly Nebula Per 01:42.4 +51:34 10.1 2.7×1.8 PLN 18.6 Medium
     77 NGC 1068 Cetus A Cet 02:42.7 -00:01 8.9 7.1×6.0 GAL 18.4 Hard
     78 NGC 2068  Ori 05:46.7 +00:03 8.0 8×6 NEB   Medium
     79 NGC 1904  Lep 05:24.5 -24:33 7.7 8.7 GCL 17.7 Medium
     80 NGC 6093  Sco 16:17.0 -22:59 7.3 8.9 GCL 17.0 Medium
     81 NGC 3031 Bode¹s Galaxy UMa 09:55.6 +69:04 6.9 27×14 GAL 17.8 4
     82 NGC 3034 Cigar Galaxy UMa 09:55.8 +69:41 8.4 11×4.3 GAL 18.8 Medium
     83 NGC 5236 Southern Pinwheel Galaxy Hya 13:37.0 -29:52 7.5 13×12 GAL 18.6 Medium
     84 NGC 4374  Vir 12:25.1 +12:53 9.1 6.5×5.6 GAL 19.0 Hard
     85 NGC 4382  Com 12:25.4 +18:11 9.1 7.1×5.5 GAL 19.1 Hard
     86 NGC 4406  Vir 12:26.2 +12:57 8.9 8.9×5.8 GAL 19.2 Hard
     87 NGC 4486 Virgo A Vir 12:30.8 +12:24 8.6 8.3×6.6 GAL 18.9 Hard
     88 NGC 4501  Com 12:32.0 +14:25 9.6 6.9×3.7 GAL 19.6 Hard
     89 NGC 4552  Vir 12:35.7 +12:33 9.8 5.1×4.7 GAL 19.3 Hard
     90 NGC 4569  Vir 12:36.8 +13:10 9.5 9.6×4.4 GAL 19.8 Hard
     91 NGC 4548  Com 12:35.4 +14:30 10.2 5.4×4.3 GAL 20.2 Hard
     92 NGC 6341  Her 17:17.1 +43:08 6.4 11 GCL 16.5 Easy
     93 NGC 2447  Pup 07:44.6 -23:52 6.2 22 OCL   3
     94 NGC 4736  CVn 12:50.9 +41:07 8.2 11×9.1 GAL 17.7 Medium
     95 NGC 3351  Leo 10:44.0 +11:42 9.7 7.4×5.0 GAL 19.7 Hard
     96 NGC 3368  Leo 10:46.8 +11:49 9.3 7.6×5.3 GAL 19.2 Hard
     97 NGC 3587 Owl Nebula UMa 11:14.8 +55:01 9.9 3.3 PLN 21.1 Medium
     98 NGC 4192  Com 12:13.8 +14:54 10.1 9.8×2.8 GAL 20.3 Hard
     99 NGC 4254  Com 12:18.8 +14:25 9.9 5.4×4.7 GAL 19.9 Hard
    100 NGC 4321  Com 12:22.9 +15:49 9.4 7.4×6.3 GAL 20.0 Hard
    101 NGC 5457 Pinwheel Galaxy UMa 14:03.2 +54:21 7.9 29×27 GAL 20.3 Hard
    102 NGC 5866 Spindle Galaxy Dra 15:06.5 +55:46 9.9 5.2x2.3 GAL    
    103 NGC 581 Cas 01:33.2 +60:42 7.4 6.0 OCL   2
    104 NGC 4594 Sombrero Galaxy Vir 12:40.0 -11:37 8.0 8.7×6.3 GAL 18.3 Medium
    105 NGC 3379 Leo 10:47.8 +12:35 9.3 5.4×4.8 GAL 18.9 Hard
    106 NGC 4258 CVn 12:19.0 +47:18 8.4 19×7.2 GAL 19.2 Hard
    107 NGC 6171 Oph 16:32.5 -13:03 7.9 10 GCL 19.2 Medium
    108 NGC 3556 UMa 11:11.5 +55:40 10.0 8.7×2.2 GAL 19.8 Hard
    109 NGC 3992 UMa 11:57.6 +53:23 9.8 7.6×4.7 GAL 20.4 Hard
    110 NGC 205 Satellite of M31 And 00:40.4 +41:41 8.1 22×11 GAL 19.8 Hard