Data of Messier Objects from: Brent A. Archinal and Steven J. Hynes, Star Clusters. Willmann-Bell, Inc., 2003. Open Clusters and Diffuse Nebula M NGC/IC d/ly d/ly Ty RA (J2000.0) Dec Con Trump Diam m_v #st bst vsur d/pc #S #2U R ours M 6 N 6405 2.0 1.584 cl 17:40:17 -32:15.5 Sco II3r 33.0 4.2 331 5.5 11.8 486 22 164 52 M6. Variable in brightness. Brightest star is BM Scorpii = HD 160371, V=5.5 to 7. Aliases: Cr 341, Lund 769, M6, Mel 178, OCl 1030, Raab 122, vdB-Ha 242, C1736-321 M 7 N 6475 0.8 0.78 cl 17:53:46 -34:47.1 Sco I3r 75.0 3.3 80 7.0 12.7 239 22 164 52 M7. Brightest star is HD 162587, center star is HD 162587. 50' diameter, 75' diameter with outliers. Aliases: Cr 354, Lund 791, M7, Mel 183, OCl 1028, Raab 125, vdB-Ha 254, C1750-348 M 8 N 6523 5.2 4.98 cl 18:04:25 -24:23.2 Sgr II2m n 15.0 4.6 113 6.0 10.5 1528 22 145 8 See notes. M8. Lagoon nebula and cluster. Position (that of HD 164906) and size for cluster only. 35 bright stars, > 100 stars total. Aliases: M8, H V.13, h 3722, h 3725, NGC 6530, NGC 6533, Cr 362, OCl 18, OCl 19, Lund 807, (5) C1800-243, Mrk 36, C1801-243 M 11 N 6705 6.0 5.46 cl 18:51:04 -06:16.2 Sct I2r 11.0 5.8 682 11.0 11.0 1675 16 125 52 See notes. M11, Wild Duck cluster. Very rich,much greater than 200 stars. Aliases: Cr 391, Lund 865, M11, Mel 213, OCl 76, C1848-063 M 16 N 6611 7.0 8.978 cl 18:18:45 -13:47.9 Ser II3m n 8.0 6.0 543 11.0 10.5 2754 15 126 52 M16, the Eagle nebula and cluster. Includes HD 168137 and HD 168075. About 90 stars total. Aliases: Cr 375, Lund 825, M16, Mel 198, OCl 54, Mrk 40, C1816-138 M 17 N 6618 5.0 4.9 cl 18:21:09 -16:10.6 Sgr III3m n 27.0 6.0 660 9.28 13.2 1500 15 126 52 M17, Omega (or Checkmark) cluster and nebula. Nebula on west central side. About 150 stars. Aliases: Cr 377, Lund 827, M17, OCl 44, Mrk 41, C1817-162 M 18 N 6613 4.9 3.919 cl 18:20:00 -17:05.9 Sgr II3p n 7.0 6.9 40 8.65 11.1 1202 15 126 52 M18. 30 bright stars, about 80 stars total. Aliases: Cr 376, Lund 826, M18, OCl 40, C1817-171 M 20 N 6514 5.2 5.2 cl 18:02:31 -23:00.7 Sgr n 30.0 6.3 70 6.0 13.7 1600 22 145 52 See notes. M20. Trifid nebula and cluster. Trifid double star (HD 164492) on west. HD 164514 on north. Aliases: M20, Cr 360, Mrk 34, Trifid nebula cl, OCl 23, Lund 803, C1759-230 M 21 N 6531 4.25 4.01 cl 18:04:13 -22:30.0 Sgr I3r 16.0 5.9 100 8.0 11.9 1230 22 145 52 M21. Central star HD 164883. Includes HD 164863. Aliases: Cr 363, Lund 806, M21, Mel 188, Ocl 26, Raab 128, Mrk 37, C1801-225 M 23 N 6494 2.15 2.08 cl 17:56:56 -19:00.7 Sgr II2r 25.0 5.5 150 10.0 12.5 637 15 146 52 M23. Aliases: Cr 356, Lund 793, M23, Mel 184, OCl 30, Raab 126. C1753-190 M 24 I 4715 10.0 MW 18:17 -18:36 Sgr 120.0 2.5 12.9 15 145 99 See notes. M24, Small Sagittarius star cloud. About 120' long by 60' wide, SW to NE. Includes NGC 6603, B92, B93, B304, B307. Alias: M24 M 24 >N 6603 10.0 9.4 cl 18:18:28 -18:24.4 Sgr I2r 4.0 11.1 100 14.0 14.1 2880 15 145 8 See notes. Cluster in M24 (this is NOT M24). Over 100 stars. Aliases: Mel 197, Raab 129, Cr 374, OCl 36, Lund 824, (2) M24, C1615-184 M 25 I 4725 2.0 2.318 cl 18:31:45 -19:07.2 Sgr III3m 26.0 4.6 601 8.0 11.7 711 15 145 52 See notes. M25. About 80 stars. Aliases: Cr 382, Lund 839, M25, Mel 204, OCl 38, Raab 131, C1823-192 M 26 N 6694 5.0 4.952 cl 18:45:15 -09:23.1 Sct II3m 10.0 8.0 120 11.0 13.0 1519 16 125 52 M26. HD 173348 is brightest star, on southwest side. About 100 stars. Aliases: Cr 389, Lund 858, M26, Mel 212, Ocl 67, Raab 136, C1842-094 M 29 N 6913 4.0 4.378 cl 20:24:06 +38:29.6 Cyg II3m n 10.0 6.6 81 9.0 11.6 1343 9 48 52 M29. Position is for HD 229239. 30 broght stars, about 100 total. Aliases: Cr 422, Lund 952, M29, OCl 168, Mrk 46, C2022+383 M 34 N 1039 1.4 1.454 cl 02:42:08 +42:45 Per II3r 25.0 5.2 60 9.0 12.2 446 4 43 4 See notes. DSFG: M34. Skiff: Large. Aliases: Cr 31, Lund 91, M34, Mel 17, OCl 382, Raab 13, C0238+425 M 35 N 2168 2.8 2.781 cl 06:09.0 +24:21 Gem III3r 25.0 5.1 434 8.0 12.1 853 5 76 4 See notes. DSFG: M35. Skiff: Very large. Aliases: Cr 82, Lund 207, M35, Mel 41, OCl 466, Raab 31, C0605+243 M 36 N 1960 4.1 4.010 cl 05:36:18 +34:08.4 Aur I3r 10.0 6.0 60 9.0 11.0 1230 5 59 4 DSFG: M36. Aliases: Cr 71, Lund 191, M36, Mel 37, OCL 445, Raab 27, C0532+341 M 37 N 2099 4.4 4.378 cl 05:52:19 +32:33.2 Aur I2r 15.0 5.6 1842 11.0 11.5 1343 5 59 4 DSFG: M37. Skiff: Central star is HD 39183. Aliases: Cr 75, Lund 115, M37, Mel 38, OCl 451, Raab 28, C0549+325 M 38 N 1912 4.2 4.023 cl 05:28:43 +35:51.3 Aur II2r 15.0 6.4 160 8.0 12.3 1234 5 59 4 DSFG: M38. Aliases: Cr 67, Lund 181, M38, Mel 36, OCl 433, Raab 26, C0525+358 M 39 N 7092 0.825 0.952 cl 21:31:52 +48:25.5 Cyg III2m 31.0 4.6 25 7.0 12.1 292 9 32 52 M39. Position is of HD 205210. 25 bright stars with rich Milky Way background. Aliases: Cr 438, Lund 994, M39, Mel 236 OCl 211, C2130+482 M 41 N 2287 2.3 2.093 cl 06:46.1 -20:46 CMa I3r 39.0 4.5 80 8 12.5 642 19 154 3 See notes. M41. Aliases: Cr 118, Lund 256, M41, Mel 52, OCl 597, Raab 40, C0644-206 M 42 N 1976 1.6 1.483 cl 05:35:16 -05:23.4 Ori n 47.0 455 11 116 4 See notes. M42, the "Trapezium" star cluster and Great Orion Nebula. Skiff: = Theta-1 Orionis cluster. Aliases: M42, Trapezium, OCl 528, Lund 188, Mrk 14, 2E 1366, 2E 0532.6-0526, 1ES 0532-05.4, Theta 1 Ori, ADS 4186, STF 748, C0532-054 M 43 N 1982 1.6 [1.5] M 44 N 2632 0.577 0.515 cl 08:40:22 +19:40.2 Cnc II3m 70.0 3.1 161 6.0 12.3 158 12 74 4 See notes. M44. "Praesepe" or "Beehive cluster." Skiff: = HD 73710 = HR 3428 (SIMBAD/Lynga center [= 39 Cnc = HD 73665] is too far N). Aliases: Cr 189, Lund 468, M44, Mel 88, OCl 507, Praesepe, Raab 75, C0837+201 M 45 0.38 0.408 cl 03:47:29 +24:06.3 Tau I3r n 120.0 1.5 100 3.0 11.9 125 4 78 54 M45. Skiff: Center star is Alcyone. Aliases: M45, Mel 22, Cr 42, OCl 421, Lund 117, HEAO 0346+24, C0344+239 M 46 N 2437 5.4 5.337 cl 07:41:47 -14:48.6 Pup II2r 20.0 6.1 186 10.0 12.6 1637 12 135 4 DSFG: M46. The planetary nebula NGV 2438 lies in front of this cluster. Aliases: Cr 159, Lund 373, M46, Mel 75, OCl 601, Raab 62, C0739-147 M 47 N 2422 1.6 1.545 cl 07:36:36 -14:29.0 Pup I3m 25.0 4.4 117 5.0 11.4 474 12 135 4 See notes. DSFG: M47. Includes approximate combined magnitude for ADS 6216, centrally located in the cluster. Skiff: = HD 60997/8. Aliases: Cr 152, Lund 356, M47, Mel 68, OCl 596, Raab 55, NGC 2478, C0734-143 M 48 N 2548 1.5 2.047 cl 08:13:44 -05:45.0 Hya I3r 30.0 5.8 80 8.0 13.2 628 12 134 4 DSFG: M48. Aliases: Cr 179, Lund 439, M48, Mel 85, OCl 584, Raab 72, C0811-056 M 50 N 2323 3.0 3.335 cl 07:02:47.8 -08:22:33 Mon II3r 15.0 5.9 80 9.0 11.8 1023 12 135 52 See notes. M50. Skiff: Center star is BD -08 1700. Aliases: Cr 124, Lund 283, M50, Mel 58, OCl 559, Raab 45, C0700-082 M 52 N 7654 5.0 5.101 cl 23:24:51 +61:36.0 Cas II2r 16.0 6.9 173 11.0 12.9 1565 3 18 52 M52. 12' diameter condensed central portion with 16' outer diameter. Rich, much greater than 100 stars. Aliases: Cr 455, Lund 1043, M52, Mel 243, OCl 260, Raab 150, C2322+634 M 67 N 2682 2.7 2.579 cl 08:51:24 +11:49 Cnc II3r 25.0 6.9 324 9.0 13.9 791 12 94 4 See notes. DSFG: M67. Skiff: Okay. Aliases: Cr 204, Lund 490, M67, Mel 94, OCl 549, Raab 81, C0847+120 M 73 N 6994 2.0 ast 20:58:56 -12:38.0 Aqr IV1p 1.4 9.7 4 10.4 10.4 16 124 52 See notes. M73, which B Skiff has recently shown is an asterism of 4 stars. Stars are GSC 05778-00802, -00492, -00509, -00594. Aliases: Cr 426, Lund 972, M73, OCl 89, C2056-128 M 78* N 2068 1.6 1.3 cl 05:46:40 +00:06.4 Ori n 7.0 192 400 11 116 8 Infrared cluster in M78 = NGC 2068. Position is for cluster. Aliases: (3) LDN 1630; (4) NGC 2068 M 93 N 2447 3.6 3.557 cl 07:44:30 -23:51.2 Pup I3r 10.0 6.2 80 9.0 11.2 1091 19 153 4 DSFG: M93. Aliases: Cr 160, Lund 376, M93, Mel 76, OCl 649, Raab 63, C0742-237 M103 N 581 8.5 8.127 cl 01:33:22 +60:39.5 Cas II2m 6.0 7.4 172 9.0 11.3 2493 1 17 4 DSFG: M103. Aliases: Cr 14, Lund 46, M103, Mel 8, OCl 326, Raab 4, C0129+604 * M78: [LDEG91] 3, cluster in M78 Open clusters in M24 Mrk 38 3.3 cl 18:15:16.6 -18:59:33 Sgr I1p 2.0 1000 15 145 99 Aliases: Bi 5, Lund 816, OCl 33, C1812-190 Cr 469 4.6 cl 18:16:33.7 -18:18:42 Sgr IV1p 2.6 9.1 51 11.2 1400 15 145 99 Archinal: Small group on the SW side of Barnard 93 (on the north side of M24). Confirmed against Collinder photograph. Aliases: Lund 818, OCl 35, C1813-182 M24 >N 6603 10.0 9.4 cl 18:18:28 -18:24.4 Sgr I2r 4.0 11.1 100 14.0 14.1 2880 15 145 8 See notes. Cluster in M24 (this is NOT M24). Over 100 stars. Aliases: Mel 197, Raab 129, Cr 374, OCl 36, Lund 824, (2) M24, C1615-184 Globular Clusters M NGC/IC d/ly d/ly Ty RA (J2000.0) Dec Con Trump Diam m_v v_HB bst vsur d/pc #S #2U R ours M 2 N 7089 37.5 38.8 gcl 21:33:27.0 -00:49:12 Aqr 16.0 6.6 16.1 13.1 12.6 11900 17 103 99 M2. Archinal: Position measured from DSS. Aliases: M2, Mel 235, EQ 2130-010, C2130-010 M 3 N 5272 33.9 32.9 gcl 13:42:11.2 +28:22:32 CVn 18.0 6.3 15.6 12.7 12.6 10100 7 71 55 M3. Aliases: M3, Mel 119, EQ 1339+286, 1E 1339.8+2837, C1339+286 M 4 N 6121 7.2 6.5 gcl 16:23:35.5 -26:31:31 Sco 36.0 5.4 13.4 10.8 13.2 2000 22 147 55 M4. Aliases: M4, Mel 144, EQ 1620-264, C1620-264 M 5 N 5904 24.5 24.8 gcl 15:18:33.8 +02:04:58 Ser 23.0 5.7 15.0 12.2 12.5 7600 14 108 55 M5. Aliases: M5, Mel 133, EQ 1516+022, C1516+022 M 9 N 6333 25.8 24.45 gcl 17:19:11.8 -18:30:59 Oph 12.0 7.8 16.2 13.5 13.2 7500 15 146 55 M9. Aliases: M9, Mel 167, EQ 1716-184, C1716-184 M 10 N 6254 14.3 14.0 gcl 16:57:08.9 -04:05:58 Oph 20.0 6.6 15.1 12.0 13.1 4300 15 107 55 M10. Aliases: M10, Mel 157, C1654-040 M 12 N 6218 16.0 18.3 gcl 16:47:14.5 -01:56:62 Oph 16.0 6.1 14.7 12.0 12.1 5600 15 107 55 M12. Aliases: M12, Mel 151, EQ 1644-018, C1644-018 M 13 N 6205 25.1 23.5 gcl 16:41:41.5 +36:27:37 Her 20.0 5.8 15.0 11.9 12.3 7200 8 50 55 See notes. M13. Aliases: M13, Mel 150, EQ 1639+365, C1639+365 M 14 N 6402 30.3 32.9 gcl 17:37:36.1 -03:14:45 Oph 11.0 7.6 17.2 14.0 12.8 10100 15 106 55 M14. Aliases: M14, Mel 175, EQ 1735-032, C1735-032 M 15 N 7078 33.6 34.2 gcl 21:29:58.3 +12:10:01 Peg 18.0 6.3 15.9 12.6 12.6 10500 16 83 55 See notes. M15. Contains planetary nebula Pease 1 = K 648. For chart, see Skiff (1992). Aliases: M15, (2) Pease 1, Mel 234, C2127+119 M 19 N 6273 28.0 35.2 gcl 17:02:37.7 -26:16:05 Oph 17.0 6.8 17.0 14.0? 13.0 10800 22 146 55 M19. Aliases: M19, Mel 160, EQ 1659-262, C1659-262 M 22 N 6656 10.4 9.8 gcl 18:36:24.2 -23:54:12 Sgr 32.0 5.2 14.2 10.7 12.7 3000 22 145 55 See notes. M22. Aliases: M22, Mel 208, EQ 1833-239, 1E1833.3-2357, C1833-239 M 28 N 6626 18.3 19.2 gcl 18:24:32.9 -24:52:12 Sgr 13.8 6.9 15.7 12.0 12.6 5900 22 145 55 M28. Aliases: M28, Mel 200, C1821-249 M 30 N 7099 26.1 24.1 gcl 21:40:22.0 -23:10:45 Cap 12.0 6.9 15.1 12.1 12.3 7400 23 143 55 M30. Aliases: M30, Mel 237, EQ 2137-234, C2137-234 M 53 N 5024 58.0 60.3 gcl 13:12:55.3 +18:10:09 Com 13.0 7.7 16.9 13.8 13.3 18500 14 71 55 M53. Aliases: M53, Mel 117, C1310+184 M 54 N 6715 87.4 69.1 gcl 18:55:03.3 -30:28:42 Sgr 12.0 7.7 18.2 15.2 13.1 21200 22 163 55 See notes. M54. This may be the nucleus of the Sagittarius Dwarf Galaxy as well as a Galactic globular cluster. Aliases: M54, Mel 216, EQ 1851-305, C1851-305 M 55 N 6809 17.3 15.6 gcl 19:39:59.4 -30:57:44 Sgr 19.0 6.3 14.4 11.2 12.7 4800 22 162 55 M55. Aliases: M55, Mel 221, EQ 1936-310, C1936-310 M 56 N 6779 32.9 31.9 gcl 19:16:35.5 +30:11:05 Lyr 8.8 8.4 16.3 13.2 13.1 9800 8 49 55 M56. Aliases: M56, Mel 220, EQ 1914+300, C1914+300 M 62 N 6266 22.5 17.9 gcl 17:01:12.6 -30:06:44 Oph? 15.0 6.4 16.3 13.2 12.3 5500 22 164 55 M62. Aliases: vdB-Ha 210, M62, Mel 159, EQ 1658-300, C1658-300 M 68 N 4590 33.3 30.3 gcl 12:39:28.0 -26:44:34 Hya 11.0 7.3 15.6 12.6 12.5 9300 21 150 55 M68. Aliases: M68, Mel 113, EQ 1236-264, C1236-264 M 69 N 6637 29.7 32.9 gcl 18:31:23.2 -32:20:53 Sgr 9.8 7.7 15.9 13.7 12.7 10100 22 163 55 See notes. M69. Aliases: M69, NGC 6634, Mel 202, EQ 1828-323, C1828-323 M 70 N 6681 29.3 30.0 gcl 18:43:12.7 -32:17:31 Sgr 8.0 7.8 15.6 13.0 12.3 9200 22 163 55 M70. Aliases: M70, Mel 211, EQ 1840-323, C1840-323 M 71 N 6838 13.0 12.7 gcl 19:53:46.1 +18:46:42 Sge 8.4 14.5 12.1 3900 16 66 6 See notes. M71. Aliases: Cr 409, M71, Mel 226, OCl 117, GCRV 12241, EQ 1951+186, CSI+18-19515, C1951+186 M 72 N 6981 55.4 59.0 gcl 20:53:27.9 -12:32:13 Aqr 6.6 9.2 16.9 14.2 13.3 18100 16 124 55 M72. Aliases: M72, Mel 233, EQ 2050-127, C2050-127 M 75 N 6864 67.5 60.3 gcl 20:06:04.8 -21:55:17 Sgr 6.8 8.6 17.5 14.6 12.8 18500 23 144 55 M75. Aliases: M75, Mel 228, EQ 2003-220, C2003-220 M 79 N 1904 42.1 42.4 gcl 05:24:10.6 -24:31:27 Lep 9.6 7.7 16.2 13.1 12.6 13000 19 155 55 M79. Aliases: M79, Mel 34, EQ 0522-245, 1E 0522.1-2433, C0522-245 M 80 N 6093 32.6 27.4 gcl 16:17:02.5 -22:58:30 Sco 10.0 7.3 16.2 12.5 12.3 8400 22 147 55 M80. Aliases: M80, Mel 142, EQ 1614-228, C1614-228 M 92 N 6341 26.7 24.45 gcl 17:17:07.3 +43:08:11 Her 14.0 6.5 15.2 12.1 12.2 7500 8 34 55 M92. Aliases: M92, Mel 168, EQ 1715+432, C1715+432 M107 N 6171 20.9 20.9 gcl 16:32:31.9 -13:03:13 Oph 13.0 7.8 15.6 13.0 13.4 6400 15 127 55 M107. Aliases: M107, Mel 148, EQ 1629-129, C1629-129 Ref 3 Archinal Monograph (1993) 4 B Skiff cluster measurements 6 Djorgowski and Meylan globular cluster catalog [1993] 8 Misc updates and corrections by Archinal 52 Corrections to the DSFG 1e 54 Corrections to SIMBAD 55 Corrections to Djorgovski and Meylan globular Cluster catalog 99 Final corrections and additional clusters based on DSS images and other checkings