List of open clusters

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Template:Short description

File:M45- The Pleiades (noao-m45denton).jpg
Image of open cluster Pleiades also known as Messier 45

This is a list of open clusters located in the Milky Way. An open cluster is an association of up to a few thousand stars that all formed from the same giant molecular cloud. There are over 1,000 known open clusters in the Milky Way galaxy, but the actual total may be up to ten times higher.[1] The estimated half-lives of clusters, after which half the original cluster members will have been lost, range from 150 million to 800 million years, depending on the original density.[2]

Table

Milky Way

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Template:TDMCA

Known and candidate Milky Way open clusters
Cluster
identifier 		Image Epoch J2000 Constellation Distance
(Light-years) 		Age
(Myr) 		Diameter Apparent
magnitude 		Notes
R. A. Dec.
Hyades File:Hyades cluster.jpg Template:RA Template:DEC Taurus 153 625 330' 0.5 [3]
Coma Star Cluster File:ASY-MB0124-Coma-Star-Cluster.jpg Template:RA Template:DEC Coma Berenices 280 400–500 120' 1.8 [4]
Coronet Cluster File:An infrared view of the region around the Coronet star cluster (eso2307f).jpg Template:RA Template:DEC Corona Australis 420–550
Messier 45 (Pleiades) File:Pleiades large.jpg Template:RA Template:DEC Taurus 444 125 120' 1.2 [5]
IC 2602 (Southern Pleiades) File:The Southern Pleiades (IC 2602).jpg Template:RA Template:DEC Carina 486 30 100' 1.9 [6]
Alpha Persei Cluster File:Alpha Perse - star.png Template:RA Template:DEC Perseus 570 50 300' 1.2 [7]
IC 2391 (Omicron Velorum Cluster) File:O Velorum Cluster iTelescope.png Template:RA Template:DEC Vela 574 30 60' 2.5 [6]
NGC 2451 A File:NGC 2451.png Template:RA Template:DEC Puppis 600 50 45' 2.8 [8][9]
Messier 44 (Beehive Cluster) File:M44-Star-Cluster.png Template:RA Template:DEC Cancer 610 830 70' 3.1 [10][11]
Melotte 186 File:Mel 186.png Template:RA Template:DEC Ophiuchus 652 100 240' 3.0 [12]
Blanco 1 Template:RA Template:DEC Sculptor 850+160
−130 		100 90' 4.5 [6]
Messier 7 (Ptolemy's Cluster) File:The star cluster Messier 7.jpg Template:RA Template:DEC Scorpius 980 ± 33 224 80' 3.3 [8][13]
Messier 39 (Pyramid Cluster) File:M39 Mazur.jpg Template:RA Template:DEC Cygnus 1,010 280 30' 4.6 [1][8]
IC 348 File:Perseus' Stellar Neighbors.jpg Template:RA Template:DEC Perseus 1,028 44 7' 7.3 [1]
NGC 6633 File:Ngc6633.jpg Template:RA Template:DEC Ophiuchus 1,040 660 20' 4.6 [14]
Pi Puppis Cluster File:Pi Puppis Cluster.PNG Template:RA Template:DEC Puppis 1,040.5 50' 2.1 [15]
NGC 2232 File:NGC 2232.png Template:RA Template:DEC Monoceros 1,060 53 45' 3.9 [1][8]
Trumpler 10 File:Trumpler10.png Template:RA Template:DEC Vela 1,100 35 14' 4.6 [1][8]
IC 4665 (Summer Beehive Cluster) File:IC 4665.png Template:RA Template:DEC Ophiuchus 1,120 43 70' 4.2 [1]
NGC 2547 File:Star cluster NGC 2547.jpg Template:RA Template:DEC Vela 1,190 38 25' 4.7 [8]
Collinder 140 Template:RA Template:DEC Canis Major 1,226 35 42' 3.5 [1][8]
Sigma Orionis Cluster File:Sigma orionis cluster.jpg Template:RA Template:DEC Orion 1,263
IC 4756 (Graff's Cluster) File:Open star clusters IC 4756 and NGC 6633.jpg Template:RA Template:DEC Serpens 1,300 500 40' 4.6 [1][8]
NGC 2516 (Southern Beehive Cluster) File:NGC 2516.jpg Template:RA Template:DEC Carina 1,300 141 30' 3.8 [8][13]
Lambda Orionis Cluster File:Collinder 69.jpg Template:RA Template:DEC Orion 1,300 5 2.8 [16]
NGC 3532 (Wishing Well Cluster) File:Eso1439a.jpg Template:RA Template:DEC Carina 1,321 316 50' 3.0 [8][13]
Trapezium Cluster File:Trapezium cluster optical and infrared comparison.jpg Template:RA Template:DEC Orion 1,344 ± 20 0.3 0.783' 4.0 [17]
NGC 752 File:NGC 752.png Template:RA Template:DEC Andromeda 1,470 1,700–2,000 75' 5.7 [18]
Messier 34 (Spiral Cluster) File:M34 Mazur.jpg Template:RA Template:DEC Perseus 1,500 180 36' 5.2 [1][13]
Messier 6 (Butterfly Cluster) File:Messier 6 - The Butterfly Cluster.jpg Template:RA Template:DEC Scorpius 1,590 94 20' 4.2 [1]
Messier 47 File:Noao-m47.jpg Template:RA Template:DEC Puppis 1,600 73 25' 4.4 [1]
NGC 6281 (Moth Wing Cluster) File:NGC 6281 DECaPS DR2.jpg Template:RA Template:DEC Scorpius 1,611 220 8' 5.4 [1]
NGC 1980 (The Lost Jewel of Orion) File:The Orion Nebula M42.jpg Template:RA Template:DEC Orion 1,793 4.7 14' 2.5 [19]
Messier 25 File:M025.jpg Template:RA Template:DEC Sagittarius 2,000 92 30' 4.6 [1]
Messier 23 File:M23 Open Star Cluster.png Template:RA Template:DEC Sagittarius 2,050 300 30' 5.5 [1][13]
NGC 5662 File:NGC 5662 DSS.jpg Template:RA Template:DEC Centaurus 2,170 70 30' 5.5 [1][13]
NGC 225 File:NGC225HunterWilson.jpg Template:RA Template:DEC Cassiopeia 2,200 130 12' 7.0 [1]
NGC 5460 File:NGC 5460.png Template:RA Template:DEC Centaurus 2,350 160 36' 5.6 [1][13]
NGC 2264 File:NGC 2264.jpg Template:RA Template:DEC Monoceros 2,350 ± 52 1.5 40' 3.9 [20]
Messier 41 File:M41-noao.jpg Template:RA Template:DEC Canis Major 2,360 240 40' 4.5 [1][13]
NGC 6025 File:NGC 6025 DECaPS DR2.jpg Template:RA Template:DEC Triangulum Australe 2,410 130 14' 5.1 [1][13]
Messier 48 File:M48 Mazur.jpg Template:RA Template:DEC Hydra 2,500 400 30' 5.8 [1]
IC 5146 File:Ic5146s.jpg Template:RA Template:DEC Cygnus 2,500±100 1 9' 7.2 [1]
Messier 67 (King Cobra Cluster/Golden Eye Cluster) File:M67 Mazur.jpg Template:RA Template:DEC Cancer 2,610 – 2,930 4,000 25' 6.9 [1][13]
NGC 2301 File:NGC 2301 PanS.jpg Template:RA Template:DEC Monoceros 2,840 165 12' 6.0 [21]
Messier 50 (Heart-shaped Cluster) File:M50 Mazur.jpg Template:RA Template:DEC Monoceros 2,870 130 14' 5.9 [22]
IC 4651 File:The rich star cluster IC 4651.jpg Template:RA Template:DEC Ara 2,900 1,900 10' 6.9 [1][13]
NGC 7822 (Berkeley 59) File:Cederblad 214 and NGC 7822 Nebulae - Davidedemartin 6.jpg Template:RA Template:DEC Cepheus 2,900 2 180' [23]
Messier 35 (Shoe-Buckle Cluster) File:M35atlas.jpg Template:RA Template:DEC Gemini 2,970 180 25' 5.0 [22]
NGC 3114 File:NGC 3114 Eguivar-crop.jpg Template:RA Template:DEC Carina 2,970 124 36' 4.2 [1]
NGC 381 File:NGC 381 PanS.jpg Template:RA Template:DEC Cassiopeia 3,120 ± 300 320 7' 9.3 [1]
Messier 93 (Critter Cluster) File:M93 Eguivar.jpg Template:RA Template:DEC Puppis 3,380 390 10' 6.2 [1]
NGC 1502 (Golden Harp Cluster) File:NGC 1502 2MASS.jpg Template:RA Template:DEC Camelopardalis 3,452 10 8' 5.7 [1]
Messier 38 (Starfish Cluster) File:M38 Open Cluster.jpg Template:RA Template:DEC Auriga 3,480 316 20' 6.4 [1]
NGC 6087 (S Normae Cluster) File:NGC 6087 full.png Template:RA Template:DEC Norma 3,500 70 14' 5.4 [1][13]
NGC 6204 File:NGC 6204 DECaPS DR2.jpg Template:RA Template:DEC Ara 3,540 79 6' 8.2 [1]
Collinder 121 Template:RA Template:DEC Canis Major 3,590 ± 0.72 50' 2.6 [24]
NGC 2169 File:NGC 2169.jpg Template:RA Template:DEC Orion 3,600 12 5' 5.9 [1]
NGC 2360 (Caroline's Cluster) File:NGC2360 - SDSS DR14 (panorama).jpg Template:RA Template:DEC Canis Major 3,700 1,000 13' 7.2 [1][13]
Messier 21 (Webb's Cross) File:Trifid and Lagoon Nebulae Excerpt- Messier 21 (noirlab2521ag).jpg Template:RA Template:DEC Sagittarius 3,930 12 14' 5.9 [1]
Bochum 14 File:Trifid and Lagoon Nebulae Excerpt- Bochum 14 (noirlab2521ai).jpg Template:RA Template:DEC Sagittarius ~4,000
NGC 189 File:NGC 0189 DSS.jpg Template:RA Template:DEC Cassiopeia 4,200 10 3.7' 8.8 [1]
Messier 18 (Black Swan Cluster) File:Messier 18.jpg Template:RA Template:DEC Sagittarius 4,230 17 5' 6.9 [1]
Messier 36 (Pinwheel Cluster) File:M36-pinwheel-cluster.png Template:RA Template:DEC Auriga 4,340 ± 0.87 25 10' 6.0 [1]
NGC 6242 File:NGC 6242 DECaPS DR2.jpg Template:RA Template:DEC Scorpius 4,350 ± 0.53 50 9' 6.4 [1][13]
Messier 37 (Salt and Pepper Cluster) File:M37 Mazur full.jpg Template:RA Template:DEC Auriga 4,500 347 14' 5.6 [1]
Messier 52 (Scorpion Cluster) File:M52atlas.jpg Template:RA Template:DEC Cassiopeia 4,600 160 15' 6.9 [1]
NGC 6067 File:NGC 6067 DECaPS DR2.jpg Template:RA Template:DEC Norma 4,621 170 14' 5.6 [1][13]
NGC 2362 (Tau Canis Majoris Cluster) File:NGC 2362 NASA.jpg Template:RA Template:DEC Canis Major 4,830 ± 0.97 4–5 5' 4.1 [25]
Messier 46 File:Messier 46 - NGC 2437.jpg Template:RA Template:DEC Puppis 4,920 ± 980 250 20' 6.1 [1]
Messier 26 File:Messier 26.jpg Template:RA Template:DEC Scutum 5,160 85 7' 8.0 [1]
NGC 2244 (Satellite Cluster) File:Rosette Nebula in Monoceros.jpg Template:RA Template:DEC Monoceros 5,200 1.9 30' 4.8 [1]
NGC 2355 File:NGC2355 - SDSS DR14 (panorama).jpg Template:RA Template:DEC Gemini 5,380 955 5' 9.7 [1][13]
NGC 188 (Polarissima Cluster) File:C1 = NGC 188.jpg Template:RA Template:DEC Cepheus 5,400 6,600 17' 8.1 [13][26]
NGC 129 File:NGC 0129 DSS.jpg Template:RA Template:DEC Cassiopeia 5,450 76 21′ 6.5 [27]
NGC 3766 (Pearl Cluster) File:Star cluster NGC 3766.jpg Template:RA Template:DEC Centaurus 5,500 14 12' 5.3
NGC 6231 (Baby Scorpion Cluster) File:NGC 6231 and ζ Sco AOFPK.jpg Template:RA Template:DEC Scorpius 5,600 ± 400 6 14' 2.6 [1][13]
Messier 16 (Eagle Nebula) File:Eagle Nebula from ESO.jpg Template:RA Template:DEC Serpens 5,700 ± 400 1.3 6' 6.0 [1]
Messier 11 (Wild Duck Cluster) File:Eso1430a.jpg Template:RA Template:DEC Scutum 6,120 250 13' 5.8 [1][13][28]
NGC 2175 File:Monkey Head Nebula (49545230921).jpg Template:RA Template:DEC Orion 6,350 8.9 5' 6.8 [1]
NGC 6756 File:NGC 6756 PanS.jpg Template:RA Template:DEC Aquila 6,363 62 4' 4.5 [1]
NGC 4755 (Jewel Box) File:A Snapshot of the Jewel Box cluster with the ESO VLT.jpg Template:RA Template:DEC Crux 6,500 14 10' 4.2 [1][13]
NGC 6200 File:NGC 6200.png Template:RA Template:DEC Ara 6,700 8.5 12' 7.4 [29]
NGC 6031 File:NGC 6031 DECaPS DR2.jpg Template:RA Template:DEC Norma 6,800 ± 2.3 117 3' 8.5 [1][30]
NGC 663 File:NGC663HunterWilson.jpg Template:RA Template:DEC Cassiopeia 6,850 25 14' 7.1 [1]
NGC 637 File:NGC 0637 DSS.jpg Template:RA Template:DEC Cassiopeia 7,045 ± 1.409 10 4.2' 8.2 [1]
NGC 2129 File:NGC2129 - SDSS DR14 (panorama).jpg Template:RA Template:DEC Gemini 7,200 10 5' 6.7 [1][31]
NGC 869 (h Persei) File:H and χ Persei.jpg Template:RA Template:DEC Perseus 7,460 12 18' 3.7 [1]
NGC 1931 File:NGC1931HunterWilson.jpg Template:RA Template:DEC Auriga 7,500 10 3' 10.1 [1]
NGC 884 (χ Persei) File:Double Cluster.jpg Template:RA Template:DEC Perseus 7,600 14 18' 3.8 [1][13]
NGC 7789 (White Rose Cluster) File:Ngc 7789 carolines rose 2024 10 04 95x180s iso640 bortle4.jpg Template:RA Template:DEC Cassiopeia 7,600 1,700 16' 6.7 [32]
NGC 457 (Dragonfly Cluster) File:NGC457WIKIcropped.jpg Template:RA Template:DEC Cassiopeia 7,922 21 20' 6.4 [33]
Collinder 261 Template:RA Template:DEC Musca 8,150 8,000 9' 10.7 [34][35]
NGC 659 (Yin-Yang Cluster) File:NGC 659.png Template:RA Template:DEC Cassiopeia 8,200 35 5' 7.9 [1]
NGC 3293 File:Eso1422a.jpg Template:RA Template:DEC Carina 8,400 8 8' 4.7
Trumpler 15 File:Trumpler15.jpg Template:RA Template:DEC Carina 8,600
Trumpler 14 File:Trumpler 14 by Hubble.jpg Template:RA Template:DEC Carina 8,980
NGC 7419 File:NGC 7419 2MASS.jpg Template:RA Template:DEC Cepheus 9,130 2' 13
Trumpler 16 File:WR 25 and Tr16-244 region (cropped).jpg Template:RA Template:DEC Carina 9,270
Messier 103 File:M103 Mazur.jpg Template:RA Template:DEC Cassiopeia 9,400 16 5' 7.4 [36]
NGC 2509 File:NGC 2509 DSS.jpg Template:RA Template:DEC Puppis 9,500 Uncertain[37] 10' 9.3 [38]
Messier 24 (Small Sagittarius Star Cloud) File:Messier 24 Colombari crop invert.jpg Template:RA Template:DEC Sagittarius 10,000 220 90' 2.5 [1][13]
NGC 6834 File:Ngc 6834.jpg Template:RA Template:DEC Cygnus 10,850 76 5' 7.8 [1][30]
NGC 2158 File:M35atlas.jpg Template:RA Template:DEC Gemini 11,000 1,054 5' 8.6 [1]
NGC 2439 File:NGC 2439.png Template:RA Template:DEC Puppis 12,570 25 9' 6.9 [1][13]
NGC 6791 File:NGC 6791 cluster.jpg Template:RA Template:DEC Lyra 13,300 8,900 16' 9.5 [1][13]
NGC 2204 File:NGC 2204 DSS.jpg Template:RA Template:DEC Canis Major 13,400 ± 1.3 787 13' 8.6 [1]
Gaia 1 File:Gaia 1 with Sirius.jpg Template:RA Template:DEC Canis Major 15,000 6,300 13' 8.3
Ruprecht 7 Template:RA Template:DEC Canis Major 16,300-18,780 [39][40]
Teutsch 2 Template:RA Template:DEC Auriga 18,590 900 2' 11 [41]
Alicante 7 (RSGC5) Template:RA Template:DEC Scutum 19,600 16–20
Alicante 10 (RSGC6) Template:RA Template:DEC Scutum 19,600 16–20
Arches Cluster File:Arches Cluster hubble friday 05292015.jpg Template:RA Template:DEC Sagittarius 25,000 2.5
Quintuplet Cluster File:Uncovering the secrets of the Quintuplet Cluster.jpg Template:RA Template:DEC Sagittarius 26,000 4.8
Arp-Madore 2 Template:RA Template:DEC Puppis 30,000 5,000 1.3' [42]
Collinder 65 File:Cr 65.png Template:RA Template:DEC Taurus
Collinder 173 File:Cr 173 (Vela OB2).jpg Template:RA Template:DEC Vela
Collinder 463 File:Collinder 463.jpg Template:RA Template:DEC Cassiopeia
Brocchi's Cluster File:CR399 DSS - Brocchi's Cluster (29449085766).jpg Template:RA Template:DEC Vulpecula

Local Group

Template:Expand list

Open clusters of the Local Group[43]
Identifier Image Epoch J2000 Diameter
([[arcminute|Template:Prime]]) 		Apparent
Magnitude 		Galaxy
Right ascension Declination
NGC 2070 File:NGC 2070 ESO.jpg Template:RA Template:DEC 3.5' 7.25 LMC[44][45]
Hodge 301 File:ESO-The Stellar Cluster Hodge 301.jpg Template:RA Template:DEC 0.5' 11 LMC[46][47]
NGC 376 File:NGC376 - HST - Potw2249a.jpg Template:RA Template:DEC 10.90 SMC

See also

References

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