Welcome!

The EPRV Research Coordination Network (RCN), sponsored by NASA’s Exoplanet Exploration Program, aims to support increased communication and collaboration within the radial velocity community as we work towards the goal of obtaining robust mass measurements for Earth analog planets.

Membership is open to the community and we invite participants from all corners of the RV community and related fields, including but not limited to: observational efforts, instrumentation, data analysis techniques, solar studies, and stellar variability mitigation. Please see the side bar for instructions / links on how to join the RCN.


The first full RCN meeting will take place on October 20th 2022 from 8a - 12p Pacific US time.

This all digital meeting will be held via Zoom (link here). The full science program, including titles and abstracts for the science talks, is available on our RCN Events page.

If you are planning to attend, please take a moment and fill out this RSVP form to assist in planning efforts for our networking / breakout rooms

Note: visit the Pyaneti wiki for instructions on how to install Pyaneti ahead of the meeting OR visit this Pyaneti wiki subpage for instructions on how to run the package from a Virtual Machine environment if you want to skip the local install process. Both options should allow full participation in Oscar’s tutorial!

Advertisement for the Fall EPRV RCN meeting on October 20th 2022

Our next EPRV colloquium will take place on October 27th and feature Annelies Mortier who will discuss her work in using precision RV observations of the sun to learn more about other stars. Recordings of previous colloquia are available via the RCN Google Drive.

Advertisement for the next EPRV Colloquium on October 27th 2022, which will feature Annelies Mortier

Background on the RCN

The 2018 National Academies’ Exoplanet Science Strategy, which provided input to the Astro 2020 Decadal Survey, acknowledged the importance of the radial velocity method “to provide essential mass, orbit, and census information to support both transiting and directly imaged exoplanet science for the foreseeable future” and recommended that “NASA and NSF should establish a strategic initiative in extremely precise radial velocities (EPRV) to develop methods and facilities for measuring the masses of temperate terrestrial planets orbiting Sun-like stars.” Subsequently, a community Extreme Precision Radial Velocity (EPRV) Working Group was chartered, which developed a roadmap for advancing the radial velocity technique to the point where EPRV detection or exclusion of Earth analogs orbiting nearby target stars of a future direct imaging mission would be feasible.

With the Astro2020 Decadal Survey recommendation for NASA to develop a large infrared/optical/ultraviolet space telescope capable of observing and spectrally characterizing potentially habitable exoplanets orbiting nearby stars, development of EPRV capabilities is critical as they will provide the only method potentially capable of discovering Earth analogs from the ground and measuring their masses. As part of its plan to “break the stellar variability barrier” and work towards enabling EPRV surveys capable of measuring the masses of Earth analogs, the EPRV WG report recommended that NASA establish an EPRV Research Coordination Network (RCN) of scientists across disciplines (solar, stellar, exoplanetary) and instruments.“ Thus, the development of this RCN, which endeavors to support the EPRV community in advancing towards the goal of detecting temperate, terrestrial, planets around Sun-like stars.