NGC 4755 (Caldwell 94) or Jewel Box
NGC 4755 or Caldwell 94 (also known as the Jewel Box) is an open cluster in the constellation Crux. It has an apparent visual magnitude of 4.2 and its angular diameter is 10 arc-minutes. NGC 4755 lies at an estimated distance of 4900 light years. The Equinox 2000 coordinates are 12h 53.6m, -60° 20´ which makes NGC 4755 a Southern Hemisphere object that is best seen during the spring. The Caldwell Spring Star Chart shows the position of all Caldwell objects visible during that season. Visit the Caldwell Catalog Photo Gallery to see more objects from this catalog. As one of the more famous objects in the Caldwell Catalog, it is commonly known as the Jewel Box.
Technical Details
- Object: NGC 4755
- Other Names: Caldwell 94, Jewel Box
- Object Type: open cluster
- Object Data: Apparent Magnitude = 4.2, Angular Size = 10 arc-minutes
- Object Position (Equinox 2000): 12h 53.6m, -60° 20´, Constellation = Crux
- Date/Time: 2011 Jun 03 at 02:50 UTC
- Location: Hotel Inca Utama, Huatajata, Lake Titicaca, BOLIVIA
- Mount: Celestron CG-5 GT
- Lens: Nikkor AF 300 f/2.8
- Camera: Canon EOS 550D (Rebel T2i)
- Field of View: 4.3° x 2.8° at 3.0 arc-sec/pixel (web version: 16.6 arc-sec/pixel)
- Exposure: 4 x 240s, f/2.8, IE800
- File Name: NGC4755-01w.jpg
- Processing (Adobe Camera Raw): Vignetting Correction, Noise Reduction, White Balance, Curves
- Processing (Photoshop CS5): Average Images, Curves
- Original Image Size: 3454 × 5179 pixels (17.9 MP); 11.5" x 17.3" @ 300 dpi
- Rights: Copyright 2012 by Fred Espenak. All Rights Reserved. See: Image Licensing.