CHI-3 is an ASA 1000, a 1-m telescope with a Ritchey Chretien design, situated in the Rio Hurtado valley, Chile. It is equipped with a set of Astrodon astrophotography filters and Sloan photometric filters. This large aperture telescope is an excellent choice for both scientific applications and astrophotography of deep-sky objects.

This telescope was discontinued in January 2023. Only One-Click Observations and Observation Bundles are available. 

Telescope Specification

• Aperture: 1000 mm (39 inches)
• Focal Length: 6800 mm
• F-ratio: 6.8
• Mount: ASA Alt-Az Direct Drive Mount
• Minimum elevation: 30 degrees

Camera Specification

• Model: FLI PL 16803 (spec sheet)
• Pixel Size: 9 μm
• Pixel Array: 4096 x 4096
• Pixel Resolution: 0.27 arcsec/pixel
• Field of View: 19 x 19 arcmin
• Filters(50mm square): Astrodon LRGB 2GEN, Ha (3nm), SII (3nm), OIII (3nm), Sloan r, Sloan g, Sloan i 
• Available binning: 1, 2
• Position angle: This can vary depending on which guide star is used.

Observatory 

• Observatory name: El Sauce Observatory
• Location: Río Hurtado, Coquimbo Region, Chile
• Coordinates: 30.472529° S, 70.762999° W (Google maps)
• Elevation: 1525 m
• Average seeing: 1.3'' - 1.8''
• MPC code: X02