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---+ September Targets

These are deep sky targets seen from Caltech 9-11PM Local in September.

|  *Object*  |  *Alternative Names*  |  *Type*  |  *Brightness*  |  *Surface Brightness*  |  *Size*  |  *Suggested Telescope/Eyepiece*  |  *Notes*  |  *Links for More Information*  |
|  M13  |  NGC6205, Hercules Cluster  |  Globular Cluster  |  5.8  |  11.0  |  20'  |  >= 10"  |  Appears as a faint white cloud, can resolve some stars: 300,000 stars, 11.6 Gyr old, 22 klyr away; the [[https://en.wikipedia.org/wiki/Arecibo_message][Arecibo Message]], one of the first attempts at communicating with extraterrestrials was beamed at M13  |  [[http://astropixels.com/globularclusters/M13-01.html][Astropixels]] [[http://messier.seds.org/m/m013.html][SEDS]] [[https://en.wikipedia.org/wiki/Messier_13][Wikipedia]]  |
|  Ring Nebula  |  M57  |  Planetary Nebula  |  8.8  |  10.9  |  230"  |  >= 10"  |  Appears as a faintly colored ring, small.   |  [[http://astropixels.com/planetarynebulae/M57-01.html][Astropixels]] [[http://messier.seds.org/m/m057.html][SEDS]] [[https://en.wikipedia.org/wiki/Ring_Nebula][Wikipedia]]  |
|  Albireo |    |  Double Star  |  0.33  |  -  |  35" apart  |  >= 6"  |   High constrast binary with one star red, one star blue.  Good excuse to talk about stellar types and colors and evolution. |  [[http://earthsky.org/brightest-stars/albireo-finest-double-star][EarthSky]] [[https://en.wikipedia.org/wiki/Albireo][Wikipedia]]  |
|  Double Cluster  |  NGC869 + NGC884  Caldwell 14  |  Open Cluster  |  3.8  |  10.9  |  60'  |  >= 10"  |  Two bright, resolved star clusters side by side.  Need wide FOV.  Both are young clusters, 7 klyr away, ~14 Myr old, containing luminous B stars |  [[http://astropixels.com/openclusters/hkPer-B01.html][Astropixels]] [[http://messier.seds.org/xtra/ngc/n0869.html][SEDS]] [[https://en.wikipedia.org/wiki/Double_Cluster][Wikipedia]]  |
|  Andromeda Galaxy  |  M31  |  Spiral galaxy  |  3.4  |  13.4  |  178'x63'  |  >= 10"  |  Can only see core in telescope, appears as faint, white cloud.  2.5 Mlyr distant.  Similar in mass and luminosity to Milky Way.  Moving toward us at 70miles/s; Collision expected in 2.5 Gyr  |  [[http://astropixels.com/galaxies/M31-01.html][Astropixels]] [[http://messier.seds.org/m/m031.html][SEDS]] [[https://en.wikipedia.org/wiki/Andromeda_Galaxy][Wikipedia]]  |
Topic revision: r1 - 2016-07-04 - OutreachAdmin