periareion

plural periareions

1. The point in an elliptical orbit around Mars that is closest to Mars.

   Mars orbit insertion requires a nominal hyperbolic periareion delta V of 2,491 m/s, at 300 km altitude.

   2013, Christianna E Taylor, Anthony Shao, Nicola Sarzi-Amade, Richard Van Allen, James Wertz, Hummingbird: Versatile Interplanetary Mission Architecture

   3 more examples

   Nakamiya et al. analyzed maneuver strategies at perigee and periareion for Earth-to-Mars transfers [29] and [30].

   2014 September-October, Masaki Kakoi, Kathleen C Howell, David Folta, “Access to Mars from Earth–Moon libration point orbits: manifold and direct options”, in Acta Astronautica, volume 102

   Taking advantage of the highly elliptical orbit (~400 km periareion and ~70,000 km apoareion) of MOM, the scientific objective of MENCA is to radially profile the composition of the neutral exosphere of Mars starting from the MOM periareion.

   2015 September, Anil Bhardwaj, S.V. Mohankumar, Tirtha Pratim Das, P. Pradeepkumar, P. Sreelatha, B. Sundar, Amarnath Nandi, Dinakar Prasad Vajja, M.B. Dhanya, Neha Naik, G. Supriya, R. Satheesh Thampi, G. Padma Padmanabhan, Vipin K. Yadav, A.V. Aliyas, “MENCA experiment aboard India's Mars Orbiter Mission”, in Current Science, volume 109, number 6

   First, a quite elongated orbit is obtained that has a periareion equal to the height of the final circular orbit; then, at successive periareions a small burn makes the orbit ever less elliptical until a circular LMO is achieved.

   2017, Giancarlo Genta, “Mars orbit insertion”, in Next Stop Mars: The Why, How, and When of Human Missions (Space Exploration), Springer Praxis Books, →DOI, →ISBN, →LCCN, page 139