Astrotreff's
Objects of the Month - 2023
Observing Guides in all four CSOG image orientations for Astrotreff's Objects of the Month in the year 2023.
Use the buttons to download the Observing Guides, click the object's name to visit the corresponding page on the Astrotreff forum. Please read Downloading CSOG and iPad Astronomy.
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Download - 2023
All of Astrotreff's Objects of the Month for the year 2023.
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January 2023
Galaxy group Holmberg 704 (NGC5907 - the "Splinter Galaxy" & PGC54419) in Draco
Click here for the Constellation editions
Click here for the Herschel edition
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Holmberg Double and Multiple Galaxies edition
Click here for the Named Objects edition
Galaxy group NGC5866 - the "Spindle Galaxy" & NGC5867
Click here for the Constellation editions
Click here for the Herschel edition
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Named Objects edition
February 2023
Asterism Persson 1 - the "Xi Orionis Group" in Orion
Open cluster NGC2169 - the "37 Cluster" in Orion
Click here for the Constellation editions
Click here for the Herschel edition
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Collinder Star Clusters edition
Click here for the Named Objects edition
Double star STF844 (WDS06083+1400) in Orion
Click here for the Struve Double Stars edition
Double star STF848 (WDS06085+1358) in Orion
Click here for the Struve Double Stars edition
Double star Xi Orionis (Jonckheere 2016 - WDS06119-1413) in Orion
March 2023
Open cluster Messier 35 (NGC2168) in Gemini
Click here for the Constellation editions
Click here for the Messier edition
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Melotte Star Clusters edition
Click here for the Collinder Star Clusters edition
Click here for the Raab Open Clusters edition
Open cluster NGC2158 in Gemini
Click here for the Constellation editions
Click here for the Herschel edition
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Melotte Star Clusters edition
Click here for the Collinder Star Clusters edition
Click here for the Raab Open Clusters edition
Click here for the Constellation editions
Click here for the Constellation editions
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Collinder Star Clusters edition
Click here for the Trumpler Open Clusters edition
Open cluster NGC2129 in Gemini
Click here for the Constellation editions
Click here for the Herschel edition
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Collinder Star Clusters edition
April 2023
Galaxies Messier 95 (NGC3351) & Messier 96 (NGC3368) in Leo
Click here for the Constellation editions
Click here for the Messier edition
Click here for the Burnham's Celestial Handbook - DSO's edition
May 2023
Galaxy Messier 106 (NGC4258) in Canes Venatici
Click here for the Constellation editions
Click here for the Messier edition
Click here for the Herschel edition
Click here for the Burnham's Celestial Handbook - DSO's edition
June 2023
Globular cluster NGC6229 in Hercules
Click here for the Constellation editions
Click here for the Herschel edition
Click here for the Burnham's Celestial Handbook - DSO's edition
July 2023
Double Star "Izar" or "Pulcherrima" - Epsilon Boötis (STF1877 - WDS14450+2704)
Click here for the Struve Double Stars edition
Double star STT288 (WDS14534+1542) in Boötes
Click here for the Struve Double Stars edition
Double star Aitken 1110 (WDS14497+0759) in Boötes
Double star Eta Coronae Borealis (STF1937 - WDS15232+3017) in Corona Borealis
Click here for the Struve Double Stars edition
Double star STF1828 (WDS14170+2412) in Boötes
Click here for the Struve Double Stars edition
October 2023
Galaxy Messier 33 (NGC598) - the "Pinwheel Galaxy" in Triangulum
Click here for the Constellation editions
Click here for the Messier edition
Click here for the Herschel edition
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Named Objects edition
November 2023
Galaxies NGC1055 - the "Smiley Galaxy" & Messier 77 (NGC1068) in Cetus
Click here for the Constellation editions
Click here for the Messier edition
Click here for the Herschel edition
Click here for the Arp Peculiar Galaxies edition
Click here for the Burnham's Celestial Handbook - DSO's edition
Click here for the Named Objects edition
Click here for the ASSA Top-100 edition
Click here for the Bennett edition
December 2023
Asterism "Kemble's Cascade" in Camelopardalis
Click here for the Constellation editions
Click here for the Named Objects edition
Open cluster NGC1502 - the "Golden Harp Cluster" in Camelopardalis
Click here for the Constellation editions
Click here for the Herschel edition
Click here for the Collinder Clusters edition
Click here for the Named Objects edition
