BSGC Instruments
The Bisei Spaceguard Center has the 1 m, 50 cm, and 25 cm telescopes. The optics design with the large field of view is suitable for asteroids and space debris surveys compared to other same size aperture telescopes.
The data during 2000-2002 are obtained by the 25 cm telescope, and the data during 2007-2017 are obtained by the 1 m telescope, respectively.
Characteristics of the 25 cm telescope | |||
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Primary mirror aperture | 25 cm | Data period | 2000 - 2002 |
Focal length | 1264 mm | ||
Field of view | 77 × 77 arcmin | ||
Limiting magnitude | 17 mag (2-min exposure) | ||
CCD Camera | Apogee AP-10 | ||
Chip number | - (none) | ||
Number of pixels | 2048 × 2048 pix (without binning) | ||
Pixel scale | 2.3 arcsec/pix (without binning) | ||
Filter | Clear (no filter) | ||
Characteristics of the 1 m telescope | ||
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Primary mirror aperture | 1 m | |
Data period | 2007 - 2017 | |
Focal length | 2930 mm | |
Field of view | 72 × 148 arcmin | |
Limiting magnitude | 18.7 mag (2-min exposure) | |
CCD Camera | PV camea (until January 2009) | New-type camera (after January 2009) |
Chip number | b1, b2, b3 | g1, g2, g3, g4 |
Number of pixels | 1024 × 2048 pix (2 × 2 binning) | 4169 × 2048 pix (without binning) 2087 × 1024 pix (2 × 2 binning) |
Pixel scale | 2.110 arcsec/pix (2 × 2 binning) | 1.058 arcsec/pix (without binning) 2.117 arcsec/pix (2 × 2 binning) |
Filter | W, C: Wideband filter (490-910 nm) V:Johnson V filter R: Cousins Rc filter I: Johnson IJ filter |
W, C: Wideband filter (490-910 nm) G: SLOAN/SDSS filter g' R: SLOAN/SDSS filter r' I: SLOAN/SDSS filter i' Z: SLOAN/SDSS filter z' |
Observation site
- Bisei Spaceguard Center Large Observation Building (1-meter telescope dome)
- East Longitude : 133°32'39"
- North Latitude : 34°40'21"
- Elevation : 463 m