Meet John MacKenty - Hubble Space Telescope (HST) Mission Scientist at Space Telescope Science Institute

John MacKenty embarked on a multifaceted journey at STScI back in 1986, initially dedicating himself to Hubble Space Telescope projects while also contributing to the early phases of the JWST mission and the Roman Space Telescope. Along this path, he witnessed significant milestones, including the launch of SM4, and played a crucial role in directing the commissioning of WFC3. These experiences have propelled him to his current role as "HST Mission Scientist", where he oversees all mission aspects, striving to enhance scientific outcomes and promote collaboration among various stakeholders. Throughout his journey, John has had the privilege of collaborating with outstanding individuals at STScI, NASA, and beyond, and he eagerly anticipates the limitless potential for discovery with HST, collaborating with JWST and other facilities to unravel the mysteries of the cosmos.

We had the opportunity to sit down with John MacKenty and delve into his journey at the Space Telescope Science Institute, as well as his invaluable contributions to the Hubble Telescope Mission.

• Can you tell us about the journey at STScI that led to your current role?

?I began my tenure at STScI in 1986, primarily focusing on HST projects, although I also made some initial contributions to JWST and, more recently, held various roles for the Roman Space Telescope.

?Throughout my time here, I've had the privilege of engaging with numerous facets of HST. Initially, I supported the WF/PC-1 camera, assisting in the design and development of its data processing pipeline and conducting ground testing. This involvement gradually expanded to encompass calibration planning and team leadership responsibilities post-launch in 1990. Subsequently, I contributed to various aspects of the development and early operations of WFPC2, followed by several years dedicated to supporting NICMOS, HST's inaugural infrared camera, both pre and post its 1997 launch.

?In early 1998, I assumed the role of STScI lead for the Wide Field Camera 3 project, also co-leading the effort based at GSFC. This role capitalized on the skills honed through prior work with three HST instruments. Additionally, my involvement with ground-based infrared instruments, a proposal for a next-generation HST instrument (albeit unsuccessful), and early engagements with JWST's design and technology proved instrumental in integrating an infrared channel into WFC3. These experiences also expedited the development of infrared detectors for JWST and Roman.

?Following over 11 years of development, WFC3 successfully launched in 2009, and I subsequently led its commissioning and operational phases for approximately six years before transitioning into my current role as HST Mission Scientist.

• ?How have you been supporting the Hubble Telescope?

In my capacity as the HST Mission Scientist, I serve within the HST Mission Office at STScI, where my responsibilities entail overseeing all scientific, technical, and operational dimensions of the mission. Our continual objective is to enhance the scientific outcomes and extend the operational longevity of HST. This endeavor largely involves providing support to our exceptional team members at both STScI and GSFC, actively engaging with our user community, and fostering effective communication among diverse stakeholders.

• What is the most memorable thing about your work with the Hubble Space Telescope?

?Over the span of more than 37 years, there have been countless memorable moments! Witnessing the launch of SM4 and the subsequent activation of WFC3 stands out as a particularly special highlight. While numerous scientific discoveries have left an indelible mark, they often unfold as ongoing processes rather than discrete "events." Ultimately, the most enduring memories revolve around the extraordinary individuals I've had the honor of collaborating with at STScI, NASA, and our partner organizations. I've gleaned valuable insights from many colleagues and aspire to have imparted some knowledge in return. Being part of a collective effort, spanning multiple teams, to achieve something transformative that has shaped astronomy over several decades has been an immense privilege.

• What excites you most about the future of the Hubble Telescope?

New avenues of scientific exploration continually unfold with HST! The Universe, with its intriguing complexity, presents endless opportunities for discovery, and HST serves as an indispensable instrument for unlocking its mysteries. By collaborating synergistically with JWST and other facilities, HST offers an unparalleled array of capabilities, poised to delve into the diverse spectrum of discoveries emerging from extensive survey projects, whether based on ground or in space. This convergence portends a future brimming with excitement and promise for HST.