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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

NGC 4755 - 22.8.2019 at 19.45 Coonabarabran, New South Wales, Australia Observation number 86838

Visibility IV / V

Juha Ojanperä, Porin Karhunvartijat

The jewelry box cluster, NGC 4755, is a well-known open star cluster in the Southern Cross. The set is small, dense and bright-stared. The brightest stars in the set are organized into a V-shaped pattern. Very beautiful set!

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • NGC 4755
    • Näyttävä
  • Constellation
    • Crux
  • Field of view
  • 51 arc minutes
  • Magnification
    • 80
  • Weather
    • Selkeää, heikko-kohtalainen puuskainen tuuli, kuiva ilma, +10C, SQM: 21.37
  • Darkness
    • Excellent
  • Seeing
    • Excellent
  • Star clusters and asterisms
    • Open cluster info

      Open cluster is an irregular group of tens or hundreds of stars. It can be visible as separate stars or a bit fuzzy spot with small instrument.

      There is the open cluster M52 on the right edge of the image. The red emission nebula is the Bubble Nebula. Image Jyrki Grönroos.


      The open cluster M45 aka Pleyades. Image Juha Parvio.


      The pair of the open clusters NGC 869 and NGC 884 aka the Double Cluster in Perseus. Image Lauri Kangas.


      M34 is also an open cluster in Perseus. Image Teppo Laitinen.


      The Wild Duck Cluster M11 is an exceptional dense open cluster. Image Jaakko Asikainen.



      The Ptolemy's Cluster M7 is located in a rich-star area of The Milky Way in Sagittarius. Image Toni Veikkolainen.

Technical information

Visual observation, drawing on cardboard, telescope: L80 / 400 mm, eyepiece: Baader Hyperion 24 mm, scanned and slightly retouched with Paint Sho Pro

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