Venus Climate Orbiter Akatsuki (PLANET-C) trajectory data
=========================================================

Last Modified: November 19, 2025
 
Overview
--------

This directory contains Akatsuki (PLANET-C) trajectory data.
Data after July 2015 are based on the trajectory plan.

 
Terms of Use
------------

When use these data, please follow the ISAS Data Policy:
  - English:  https://www.isas.jaxa.jp/en/researchers/data-policy/
  - Japanese: https://www.isas.jaxa.jp/researchers/data-policy/


Files
-----

1. ASCII text data of the positions of Akatsuki, Earth and Venus
   in Earth mean equator and equinox of J2000 frame centered at
   the Sun with 1 day interval (May 2010 to January 2018) (*)

2. ASCII text data of the positions of Akatsuki, Earth and Venus
   in Earth mean equator and equinox of J2000 frame centered at
   the Sun with 1 hour interval (July 2015 to January 2018) (*)

3. NASA NAIF (Navigation and Ancillary Information Facility) SPICE
   Kernel of Akatsuki trajectory data (July 2015 to January 2018)
 
* Format of data 1 and 2 (given in the header part):
    column  1: Time in UTC (YYYY-MM-DDTHH:MM:SS)
    column  2: Days from 2010 May 21 or 2015 July 1, 00:00:00(UTC)
    column  3: Akatsuki-X (km)
    column  4: Akatsuki-Y (km)
    column  5: Akatsuki-Z (km)
    column  6: Earth-X (km)
    column  7: Earth-Y (km)
    column  8: Earth-Z (km)
    column  9: Venus-X (km)
    column 10: Venus-Y (km)
    column 11: Venus-Z (km)
 

Comments about these data
-------------------------
e-mail: darts-admin AT ML.isas.jaxa.jp