The archive data of Bisei Spaceguard Center at DARTS are mainly astronomical data such as asteroids approaching to Earth. The data are taken using the 1 m telescope at BSGC during the period from Mar 2007 through Mar 2017. Please see BSGC data document for more details.


The data are divided into directories for each year, 20YY/. Under each directory, there are directories for each day, 20YYMMDD/ (Year, Month, and Day) with mpNN/ or mpNN_[String]/ directories. NN is a number put in numerical order of the day, and [String] is an arbitrary character string that could be a celestial object name, a provisional designation, an asteroid name, a comet name, a spacecraft name, or celestial coordinates, etc. Most of them indicate a personal name of a near-earth object candidate discovered at other observatories in the world on that day or the few days before. These data were taken while tracking the concerned object.


  2007/ -- 20070322/ --- mp01/  mp02/  mp03/  mp04/ mp05/  mp06/  mp07/  mp08/
  2017/ -- 20170328/ --- mp01_YFA3BDA/ mp02_YF9EE67/


Each mpNN/ or mpNN_[String]/ directory stores [X,A]_[HHMMSS][n,s][DDMM]_[YYMMDD]_####_[b1,b2,b3,g1,g2,g3,g4].fits files.
  • [X,A] indicates the telescope tracking method. But they are not strictly different.
  • [HHMMSS][n,s][DDMM] shows equatorial coordinates of the telescope pointing position. n and s mean the Northern and Southern Hemisphere, respectively.
  • [YYMMDD] is the date with year, month, and day.
  • #### is a number in numerical order of continuous observations with the same pointing position.
  • [b1,b2,b3,g1,g2,g3,g4] shows the CCD camera chip number. CCDs by Pixel Vision (b1~b3) were used until Jan 2009. After that, the new-type mosaic camera (g1~g4) is used. The pointing coordinate is positioned at the center of the b2 or g3 chip.

  = The data pointing at (8h40m50s, 33d21m) using b1 chip of the Pixel Vision's camera on March 22, 2007.

Last Modified: 06 October 2022