; and (2) to expand the Administration’s Near-Earth Object Program to include the detection, tracking, cataloguing, and characterization of potentially hazardous near-Earth objects less than 140 meters in diameter. (h) Transmittal Not later than 270 days after the date of enactment of the National Aeronautics and Space Administration Transition Authorization Act of 2017 , the Administrator shall transmit the results of the assessment under subsection (g) to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Science, Space, and Technology of the House of Representatives . . 512. Near-Earth objects public-private partnerships (a) Sense of Congress It is the sense of Congress that the Administration should seek to leverage the capabilities of the private sector and philanthropic organizations to the maximum extent practicable in carrying out the Near-Earth Object Survey Program in order to meet the goal of that program under section 321(d)(1) of the National Aeronautics and Space Administration Authorization Act of 2005 (51 U.S.C. note prec. 71101(d)(1)). (b) Report Not later than 180 days after the date of enactment of this Act, the Administrator shall submit to the appropriate committees of Congress a report describing how the Administration can expand collaborative partnerships to detect, track, catalogue, and categorize near-Earth objects. 513. Assessment of science mission extensions Section 30504 of title 51, United States Code, is amended to read as follows: 30504. Assessment of science mission extensions (a) Assessments (1) In general The Administrator shall carry out triennial reviews within each of the Science divisions to assess the cost and benefits of extending the date of the termination of data collection for those missions that exceed their planned missions’ lifetime. (2) Considerations In conducting an assessment under paragraph (1), the Administrator shall consider whether and how extending missions impacts the start of future missions. (b) Consultation and