The Kepler Asteroseismic Science Operations Center provides asteroseismological data from the NASA Kepler mission to astronomers who are members of the Kepler Asteroseismic Science Consortium (KASC).

If you are a member of KASC, please log in below...

In order to have access to the Kepler Asteroseismic data you have to be a member of KASC. Please see the "New KASC member" page on how to become a member.


27th Apr 2016: Problems with download of older data releases

Due to computer system-work in Aarhus, some of the older versions of Kepler/K2 data is currently not available for download through KASOC. The newer data releases are not affected. We will try to keep you up-to-date when everything is back online again.

27th Apr 2016: K2 campaign 7 data available

The data from K2 campaign 7 is now available for download, both from the "Data Search" interface and in "Bundles" for the cluster Ruprecht 147, trojan asteroids and ex-planet Pluto. Enjoy!

7th Mar 2016: Long Cadence Data Release 25 is available

All of the long cadence data from Data Release 25 has now been made available through KASOC. Have a look at the documentation to see what the changes are, compared to the earlier DR24 release.

Kepler & K2 News

23rd May 2016: Raw data for K2 Campaign 9a now available at MAST

The currently on-going K2 Campaign 9 is dedicated to a microlensing experiment, aimed at simultaneously observing gravitional microlensing events with K2 and from Earth in order to see a parallax effect in the shape and time of the lensing events. To allow such events to be identified and characterized rapidly, the raw data of this campaign are being released instantly through the data archive at MAST.

The data obtained during the first half of C9 (Apr 22 - May 18) are now available at https://archive.stsci.edu/pub/k2/c9_raw_cadence_data

The use of the level 1 data files requires an intimate understanding of their structure, as documented in KADN-26135. The Kepler/K2 Guest Observer Office has released a tool to convert these data into more traditional multi-extension image FITS files. The tool, called "kadenza", is available and documented at https://github.com/KeplerGO/kadenza

The traditional calibrated data products are scheduled to be processed and released by September 26.

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16th May 2016: New funding opportunity for work on K2 solar system data

A recent amendment to NASA's Discovery Data Analysis Program (DDAP) permits the submission of proposals for work on Kepler/K2 observations of solar system targets. The objective of the DDAP program is to enhance the scientific return of Discovery Program missions by broadening the scientific participation in the analysis of data, both recent and archived.

The program intends to fund solar system science. Proposals using Kepler/K2 observations of objects outside the solar system are not eligible and should be submitted to the Astrophysics Data Analysis Program (ADAP) instead. A non-exhaustive list of K2's solar system targets is given below.


Because operating in the ecliptic plane minimizes the torque exerted on the spacecraft by solar pressure, the K2 mission entails a series of sequential observing Campaigns of fields distributed around the ecliptic. A result of this observing strategy is that the K2 fields contain a large number of solar system targets, which can be observed to provide high-cadence, uninterrupted light curves to e.g. measure rotation periods, constrain object shapes and spin states, and search for activity in comets or oscillations in giant planets. Because Solar System objects move relative to the celestial sphere, long streaks of pixels are downloaded from the Kepler spacecraft to cover their trajectory (or part thereof).

Solar system targets in Campaigns 0-9

The K2 mission has so far targeted 92 solar system objects during Campaigns 0 through 9 as part of the approved observing programs. These objects are listed below.

This list is not exhaustive because thousands of objects are known to have serendipitously been observed for short periods of time as they passed through the pixel masks of other targets. A list of these serendipitously-observed targets is not available at this time, but note that the visibility of solar system targets in past or future K2 Campaigns can be checked using the K2ephem command-line tool.

Planets and moons
  • Uranus and its moons Caliban, Prospero, Setebos, Sycorax (C8)
  • Neptune and its moon Nereid (C3)
  • Pluto (C7)
  • C/2013 A1 Siding Spring (C2)
Trans-Neptunian Objects
  • Quaoar (C9)
  • 1998 SN165 (C8)
  • 2001 QT322 (C8)
  • 2001 YH40 (C5)
  • 2002 GV31 (C1)
  • 2002 KY14 (C4)
  • 2003 QW90 (C8)
  • 2005 RS43 (C8)
  • 2007 JJ43 (C2)
  • 2007 OR10 (C3)
Trojan and Hilda asteroids
  • Actor (C6)
  • Agasthenes (C6)
  • Agrius (C6)
  • Amphilochos (C6)
  • Amphimachus (C6)
  • Atreus (C6)
  • Demophon (C6)
  • Dolios (C6)
  • Eumelos (C6)
  • Eupraksia (C6)
  • Halaesus (C6)
  • Halitherses (C6)
  • Hesiodos (C6)
  • Icarion (C6)
  • Kalchas (C6)
  • Odysseus (C6)
  • Stichius (C6)
  • Telamon (C6)
  • Thrasymedes (C6)
  • 1986 WD (C6)
  • 1989 BL (C6)
  • 1996 RJ33 (C6)
  • 1997 SJ4 (C6)
  • 1997 TV28 (C6)
  • 1997 WA12 (C6)
  • 1998 SU52 (C6)
  • 1998 TC31 (C6)
  • 1998 TV33 (C6)
  • 1998 UH16 (C6)
  • 1998 US24 (C6)
  • 1998 VD30 (C6)
  • 1998 VL27 (C6)
  • 1998 VU6 (C6)
  • 1998 WA15 (C6)
  • 1998 WX9 (C6)
  • 1999 TJ90 (C8)
  • 1999 TS40 (C8)
  • 1999 VG135 (C8)
  • 1999 WS4 (C6)
  • 1999 YN12 (C6)
  • 2000 AA80 (C6)
  • 2000 AC115 (C6)
  • 2000 AR25 (C6)
  • 2000 AU31 (C6)
  • 2000 HR50 (C6)
  • 2000 QG199 (C7)
  • 2000 WC140 (C8)
  • 2001 AH11 (C6)
  • 2001 BD25 (C6)
  • 2001 BU42 (C6)
  • 2001 CB35 (C6)
  • 2001 CD23 (C6)
  • 2001 CT28 (C6)
  • 2001 CX27 (C6)
  • 2001 CX6 (C6)
  • 2001 EN12 (C6)
  • 2001 OB100 (C6)
  • 2001 OG13 (C6)
  • 2001 QC20 (C6)
  • 2001 QW127 (C6)
  • 2001 SM251 (C7)
  • 2002 ES46 (C6)
  • 2002 EU106 (C6)
  • 2002 EU34 (C6)
  • 2002 FU36 (C6)
  • 2002 GL77 (C6)
  • 2002 NA28 (C6)
  • 2002 RN121 (C6)
  • 2005 CB68 (C7)
  • 2006 UB219 (C8)
  • 2007 RY194 (C8)
  • 2008 SY172 (C6)
  • 2010 XP50 (C6)

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29th Apr 2016: More community generated light curves available at MAST

The Oxford Exoplanets group announces the release at MAST of a new set of K2 light curve High Level Science Products. The Oxford group has applied the K2 Systematics Correction (K2SC) Gaussian Process-based detrending algorithm to project generated long-cadence light curves from Campaigns 3 to 6. This algorithm simultaneously models astrophysical variability and pointing systematics, enabling the user to disentangle the two and remove either or both. These light curves are therefore well-suited to searches for transits and other short-lived events in the light curves of variable active stars, or to studying stellar variability. Additional campaigns will be added as the data becomes available and the source code is available from Github.

This release complements the K2 data already hosted at the MAST, which includes the project generated data products, and community generated High Level Science Products.

Read more

Recently published scientific publications

  • V. Van Eylen: What asteroseismology can do for exoplanets: Kepler-410A b is a Small Neptune in an eccentric orbit consistent with low obliquity
    Updated: Tue 26th April 2016 12:23.
  • A. Jimenez: Analysis of the acoustic cut-off frequency and the HIPs in 6 Kepler stars with stochastically excited pulsations
    Updated: Mon 25th April 2016 15:27.
  • M. S. Lundkvist: Hot super-Earths stripped by their host stars
    Updated: Mon 18th April 2016 13:32.
  • Zhijia Tian: Asteroseismic analysis of solar-like star KIC 6225718: constraints on stellar parameters and core overshooting
    Updated: Fri 15th April 2016 04:29.
  • T. Kallinger: Precise stellar surface gravities from the time scales of convectively driven brightness variations
    Updated: Wed 6th April 2016 10:56.
  • Ehsan Moravveji: Tight asteroseismic constraints on core overshooting and diffusive mixing in the slowly rotating pulsating B8.3V star KIC 10526294
    Updated: Wed 6th April 2016 10:53.
    Updated: Thu 31st March 2016 01:10.

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