Current Status

Telescope status

  • Telescope reflectivity has been updated on Jan, 2020:
    Telescope mirrors reflectivity (Primary/IR-M2/IR-M3) (December, 2019)

  • Telescope will be closed from 22 July to 8 September 2019 due to the repairing of the main shutter.

    [Since 2017.Apr]
  • The windscreen of telecope has not been available since April 2017. We recommand for user to prepare backup targets to avoid a strong wind effect.

Instrument status

  • REACH (IRD+SCExAO) is opening from S20B.
  • COMICS will be decommissioned from S20B, i.e.,not available since S20B).
  • MOIRCS will be hibernated from S21A.
  • AO188 is available only NGS mode in S20B. New laser will be installed in S20B.
  • VAMPIRES can be operated simultaneously with CHARIS/SCExAO NIR observations.
  • AO188 is available only NGS mode in S19B and S20A.

User support

  • The observing planning tool, hskymon, is updated (ver 3.8.2). It is useful for checking target visibility, finding standard star, checking finding chart, searching AO guide stars, etc. (09 April, 2019)
  • Subaru HDS++ OPE file editor (HOE) is available for HDS, IRCS, and HSC (ver 4.1.0) (17 June, 2019)

General enquiries may be directed to Dr. Tae-Soo Pyo (

3 Feb, 2020

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