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| | loneos.ref |
 | | Pac., 100, 693-701 (1988) UBV photometry of the open cluster NGC 381. | | | J., 112, 2026-2052 (1996) CCD photometry of galactic globular clusters. | | | J., 118, 432-441 (1999) CCD photometry of galactic globular clusters. |
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http://www.tass-survey.org/tass/catalogs/loneos.ref
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| | M6 Butterfly Open Cluster |
| | is known as the Butterfly, is an open cluster of some 50 stars in Scorpius. |
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http://www.sonic.net/~ganymede/Astro/pages/M06.htm
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| | Deep Sky CCD Imaging |
| | M26 - Open Cluster in Scutum: 20 - 10 second snapshots. | | | M36 - Open Cluster in Auriga: This is a 5 second exposure. | | | M34 - Open Cluster in Perseus: This is a 5 second exposure. |
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http://www.dharmaworks.net/Astronomy/ccd/deepsky.html
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| | BBC - h2g2 - Messier Objects |
| | M29 - A rather unimpressive open cluster of magnitude 7.1 in the constellation of Cygnus. | | | M21 - An open cluster in Sagittarius which shines at magnitude 6.5, this object is situated close to M20, the Trifid Nebula. | | | M34 - An open cluster which shines at magnitude 5.5 in Perseus, this object can be visible with the naked eye in dark skies, but a small telescope or pair of binoculars will show many of the stars which are scattered over an area as large as the full moon. |
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http://www.bbc.co.uk/h2g2/guide/A480502
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| | Astron. Astrophys. 333, 897-909 (1998) |
| | Therefore open clusters could be the first physical environments, observed with a sufficient spatial resolution, in which we note a non-universality of the IMF. | | | In the context of massive star formation in the center of clusters, it is worth noting that we observe numerous examples of multiple systems of O-stars in the center of very young open clusters. | | | These intervals are computed relatively to the maximum stellar mass of the considered cluster. |
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http://aa.springer.de/papers/8333003/2300897/sc4.htm
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| | Messier Visible Database |
| | M11 is described as an "exceptional" open cluster bordering the northern edge of the star clouds in Scutum. | | | M26 is a small and condensed open cluster of about 100 total members, 25 of which are easily visible in a small telescope. | | | M62 is a "fine little" globular cluster, and is one of the most irregular such objects known. |
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http://affy50.tripod.com/Messier.html
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| | * Open Cluster - (Astronomy): Definition |
| | My list contains 26 open clusters brighter than M26 in Scutum, the dimmest Messier with a magnitude of 8. | | | Open clusters are collections of hot, recently formed stars that are found preferentially in the spiral arms of the galaxy. | | | Open clusters such as these are found in the disk of the Galaxy, and they therefore lie largely in the plane of the Milky Way. |
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http://www.mimihu.com/astronomy/open_cluster.html
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| | Clusters |
| | These are my drawings and/or CCD images of some of the Star Clusters in the Messier Catalog. | | | This is another big cluster that is almost better in the view finder than in the scope itself, use your widest angle and lowest magnification eyepiece. | | | This was a much smaller cluster that had some nebulostiy in the center where I couldn't resolve stars all the way. |
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http://www.dharmaworks.net/Astronomy/clusters.html
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| | Clusters |
| | These are my drawings and/or CCD images of some of the Star Clusters in the Messier Catalog. | | | This is another big cluster that is almost better in the view finder than in the scope itself, use your widest angle and lowest magnification eyepiece. | | | This was a much smaller cluster that had some nebulostiy in the center where I couldn't resolve stars all the way. |
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http://www.dharmaworks.net/Astronomy/clusters.html
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| | open: Definition, Synonyms and Much More From Answers.com |
| | To make available for use: opened the area to commercial development; opened the computer file and retrieved some data. | | | The open procedure "locks on" to an existing file. | | | Meaning #9: make the opening move, in chess |
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http://www.answers.com/main/ntq-tname-open-cluster-fts_start-60
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| | refs |
| | Astrophys.J. 443 Svolopoulos,S.N. :1962, Spectral classification in nine open clusters. | | | Publ.Astron.Soc.Pacific 89,646-647 3 Abt,H.A. :1979, Spectral types in the Alpha Persei cluster Publ.Astron.Soc.Pacific 90,692 4 Abt,H.A. :1980, Are binaries concentrated toward the centers of open clusters? | | | 312 Lloyd Evans,T. :1978, The open cluster NGC 6383. |
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http://cdsweb.u-strasbg.fr/viz-bin/ftp-index?/ftp/cats/vii/92A/refs
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| | Sid's Astronomical Images |
| | M38 open star cluster (46KB) A CCD image taken with an SBIG ST-8XE on January 5, 2006 using a Takahashi FCT-150 refractor. | | | M36 open star cluster (24KB) A CCD image taken with an SBIG ST-8E on November 13, 2000 using a Takahashi FCT-150 refractor. | | | M46 A color CCD image of the open star cluster M46 and planetary nebula NGC 2438 taken with a Takahashi FCT-150 refractor and ST-8E CCD. |
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http://members.cox.net/~sidleach/list.htm
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| | OpenClusters |
| | This is one of the showiest open clusters in the southern sky. | | | As is the case with almost all open clusters, there is a red star near the center of the group a 7th magnitude K3 giant. | | | As open clusters go, it is one of the most massive; it includes at least 17 variables; and its population contains a high level of metallicity. |
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http://www.belmontnc.4dw.net/openclusters.htm
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| | Art Russell's Monthly Messier Star-Hop; March #1 |
| | A 4.4 magnitude open cluster, is our next stop. | | | The open cluster is almost entirely within the filed of view. | | | This month we start off with an open cluster, NGC 2244, and its associated nebula, the Rosette Nebula. |
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http://education.gsu.edu/spehar/FOCUS/Astronomy/star-hop/Monthly/msh03-1.htm
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| | open: Definition, Synonyms and Much More From Answers.com |
| | To make available for use: opened the area to commercial development; opened the computer file and retrieved some data. | | | Meaning #9: make the opening move, in chess | | | The open procedure "locks on" to an existing file. |
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http://www.answers.com/main/ntq-tname-open-cluster-fts_start-60
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| | Astronomy Online |
| | The purpose of this project is to create a CMD of an open cluster, M67, and give a brief analysis of the result. | | | This is in agreement with open clusters being younger in age that globular clusters. | | | Open clusters on the other hand are considered young, and exist within the main disk of a galaxy (Ostlie, page 530). |
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http://astronomyonline.org/Astrophotography/CMDDiagram.asp?Cate=Astrophotography&SubCate=CMDDiagram
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| | Art Russell's Monthly Messier Star-Hop; February #1 |
| | In the same field of view you may also see a dimmer open cluster, NGC 1907, a magnitude 8.2 object, but you won't be deceived, M38 is easily visible. | | | Our third and final Messier object in Auriga, is the 5.6 magnitude open cluster M37, NGC 2099. | | | M35 is harder to find than the other Messier objects we've looked at this month, so don't be surprised if it takes you a bit longer to find it. |
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http://education.gsu.edu/spehar/focus/astronomy/star-hop/Monthly/msh02-1.htm
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| | Exercise 1.3: Distance to the Open Clusters |
| | Open clusters have been known since prehistoric times: The Pleiades (M45), the Hyades and the Beehive or Praesepe (M44) are the most prominent examples, but Ptolemy had also mentioned M7 and the Coma Star Cluster (Mel 111) as early as 138 AD. | | | Open clusters are physically related groups of stars held together by mutual gravitational attraction. | | | Download data.xls and open it on your computer. |
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http://www.astro.lsa.umich.edu/Course/MMSS/Interactive/Ex1.3
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| | OpenClusters |
| | Open clusters can be dazzling displays of vast numbers of colorful jewels. | | | Besides being twice the actual size of M-44, and five times farther away, it is one of the oldest open clusters in the galaxy, at between 4 and 5 billion years, or roughly the same age as the Solar System. | | | As open clusters go, it is one of the most massive; it includes at least 17 variables; and its population contains a high level of metallicity. |
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http://www.belmontnc.4dw.net/openclusters.htm
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| | Art Russell's Monthly Messier Star-Hop; February #1 |
| | In the same field of view you may also see a dimmer open cluster, NGC 1907, a magnitude 8.2 object, but you won't be deceived, M38 is easily visible. | | | Our third and final Messier object in Auriga, is the 5.6 magnitude open cluster M37, NGC 2099. | | | As we run out along the right leg that the cluster forms, we can extend a line to the 1.6 magnitude star Beta (b) Tauri, Elnath, which marks the tip of the right horn of the mythological figure, Taurus, the Bull. |
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http://education.gsu.edu/spehar/FOCUS/Astronomy/star-hop/Monthly/msh02-1.htm
(677 words)
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| | OpenClusters |
| | This is one of the showiest open clusters in the southern sky. | | | As is the case with almost all open clusters, there is a red star near the center of the group a 7th magnitude K3 giant. | | | As open clusters go, it is one of the most massive; it includes at least 17 variables; and its population contains a high level of metallicity. |
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http://www.belmontnc.4dw.net/openclusters.htm
(677 words)
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| | Open Cluster Celebration |
| | The stars inside of open clusters are young to middle aged, and the groups are among the youngest of any groupings of stars in the sky. | | | Open clusters are groups of perhaps 10 to a few thousand stars. | | | The open clusters we will be viewing this week (weather permitting, of course) are the objects M35, M36, M37, and M38. |
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http://tmclark.com/Starwatch/3_15.html
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| | List of NGC objects |
| | NGC 6087 - an open cluster in the Norma constellation | | | NGC 6405 - M6, the Butterfly Cluster, in the Scorpius constellation | | | NGC 6994 - M73, an object in the Aquarius constellation |
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http://www.sciencedaily.com/encyclopedia/list_of_ngc_objects
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| | * Open Cluster - (Astronomy): Definition |
| | The Pleiades is an example of an open cluster. | | | Beyond the New General Catalog there are dozens of other catalogues of deep sky objects - the Dolidze Dzimselejsvili (DoDz) open cluster s catalogue is one of them. | | | Activity #5 - Open Cluster s versus Globular Cluster s |
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http://en.mimi.hu/astronomy/open_cluster.html
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| | BinoSky: A guide to astronomy with binoculars. |
| | M6 (the Butterfly Cluster, an open cluster in Scorpius) | | | The Netscape Open Directory (DMOZ) project lists several other binocular astronomy sites. | | | the Christmas Tree Cluster, whose integrated brightness is misleadingly high because it is contributed almost entirely by a single star. |
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http://www.lightandmatter.com/binosky/binosky.html
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| | Backyard BC: Minimum Aperture Catalog (MAC) Studies Perseus and Auriga |
| | Open cluster's are less impacted by seeing transparency that other deepsky studies. | | | Cluster NGC1893 could be seen as a faint spray of stars one 80x field east-northeast of 5th magnitude 19. | | | Saturday, February 23rd's sky was kind enough to open a brief window on the heavens. |
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http://astro.geekjoy.com/specreps/feb-20-02-report.html
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| | Deepsky observing report M16, M17, M18, M24, M22, M8, M11, IC 4756, NGC 6633, NGC 253, NGC 247, NGC 188, NGC 891 |
| | This beautiful object, a combination of an emission nebula (NGC 6618) and open cluster (also NGC 6618), was discovered by Chesaux in the spring of 1746, before it was rediscovered by Messier in June of the same year. | | | M11 is one of the richest and brightest open clusters. | | | M18 is a galactic cluster of magnitude 6.9. |
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http://www.backyard-astro.com/deepsky/2003_09_26/ITT.html
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| | Clusters |
| | These are my drawings and/or CCD images of some of the Star Clusters in the Messier Catalog. | | | This is another big cluster that is almost better in the view finder than in the scope itself, use your widest angle and lowest magnification eyepiece. | | | This was a much smaller cluster that had some nebulostiy in the center where I couldn't resolve stars all the way. |
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http://www.dharmaworks.net/Astronomy/clusters.html
(864 words)
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| | Backyard, Boulder Creek: 12/06/01 |
| | There would be no chance on this evening to track down 7.5 magnitude open cluster NGC6910 - despite the fact that it is to be found in the same field of view as 2.3 magnitude Sadr. | | | Open Cluster NGC7789, Magnitude: 6.7, Apparent Size: 16', Average Surface Brightness (ASB): 12.4, Recommended Aperture: 150mm (refractor) I'd like to think that the 80mm Pup would give a decent view of this one - but unfortunately not under ~4.5 ULM seeing. | | | The cluster was "hand-entered" into my star charts as a result of the lack of critical detail in the originals. |
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http://astro.geekjoy.com/specreps/dec-06-01-report.html
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