Hera International Workshop 2023

October 10-12th, 2023 - ESTEC, Erasmus auditorium

October, 10th

Session 1: Hera Spacecraft, Payload, and Science status

10:00 Introduction, Logistics (M. Küppers)

10:05 DART outcome (A. Rivkin, O. Barnouin)

10:30 Hera status (I. Carnelli)

10:50 Hera spacecraft (S. Voegt)

11:05 Hera Science update (P. Michel)

11:20 AFC update (J.-B. Vincent)

11:30 Hyperscout update (J. de Leon)

11:40 TIRI update (T. Okada)

11:50 PALT update (P. Gordo)

12:00 RSE update (P. Tortora)

12:10 Milani update (M. Cardi, T. Kohout, E. Palomba, F. Ferrari)

12:25 Juventas update (O. Karatekin, A. Herique)

12:40 Lunch

Session 2: Rapid Apophis Mission for SEcurity and Safety (RAMSES)

14:00 RAMSES Overview and status (P. Martino)

14:20 JHU APL potential contributions to RAMSES: a high-heritage Narrow-Angle Camera for asteroid exploration and a novel flyby mass experiment (O. Barnouin, R. Ballouz)

14:30 Seismometer to Investigate Interior Asteroid Structure (SIIAS, K. Walsh)

14:35 An innovative InterSatellite Link (ISL) transceiver for the RAMSES mission (P. Tortora)

14:40 A compact seismometer for RAMSES (N. Murdoch)

14:45 Investigating Apophis Gravity Field and Tidal Deformation by Tracking Artificial Particles (P. Panicucci, F. Ferrari)

14:50 Monostatic and bistatic sounding of Apophis from CubeSats (A. Herique)

14:55 Requirements on optical and spectral observations of Apophis (T. Kohout, O. Karatekin)

15:00 Thermal Imager TIRI for RAMSES (T. Okada)

15:05 Potential use of the flight-spare of OCAMs-MapCam from OSIRIS-REx for RAMSES (B. Rizk)

15:10 Discussion

15:30 Coffee break

Session 3: Ground-based observations (WG 2)

16:00 Report on modelling from the 2022-2023 observations + Lessons from previous fainter apparitions 2015-2021 (P. Pravec)

16:30 Planning mutual event observations in the next apparition (June 2024-March 2025) (P. Pravec)
16:45 Stellar occultation observations in 2022-2023 and plans for 2024 (D. Souami) 17:30 VLT/XSHOOTER spectra of Didymos around the DART impact (J. de León) 17:40 Ground-based characterization of Didymos with the TNG (S. Ieva)

17:50 Context of formation of satellites among taxonomies (K. Minker)

18:00 Adjourn

19:00 Cocktail dinner at ESTEC

October, 11th

Session 4: Impact modelling and experiments (WG 1)

09:00 Introduction (K. Wünnemann)

09:10 Momentum Enhancement β in a variety of targets, including crushed basalt, with comparison to DART (J. Walker)

09:26 Impulse coupling measurement of metallic and carbon targets during laser ablation with ballistic pendulum experiment and simulation (Le Bras)

09:42 The capacities of the Experimental Projectile Impact Chamber (EPIC) at Centro de Astrobiología (CAB), INTA-CSIC, Spain, in support of the DART-Hera mission (J. Ormö, I. Herreros)

09:58 Validation of ejection processes of large boulders in impact experiments (R. Luther)

10:14 Numerical simulations for impactor hitting on large boulder of rubble-pile asteroid - the effects for the kinetic impact test (K. Dai, M. Zhou)

10:30 Coffee Break

11:00 Interactions between impactor and boulder geometry in a DART-like impact (K. Kumamoto)

11:16 Physical properties of asteroid Dimorphos as derived from the DART impact (S. Raducan)

11:32 Late-stage crater evolution and ejecta re-accumulation (M. Jutzi, Della Mogli, S. Raducan)

11:48 Feasibility of WCSPH Adaptations in Spheral to Achieve Long Run-Out Times (E. Bjonnes)

12:04 Discussion/conclusions (S. Raducan. M. Jutzi, K. Wünnemann)

12:15 Lunch

Session 5: Dynamics and physical properties modelling (WG 3)

14:00 General Presentation of WG 3 (A. Campo-Bagatin, M. Tsiganis, S. Charnoz)

14:10 Dynamical problems in the frame of the Hera mission (M. Tsiganis)

14:15 Summary of results from the DART Dynamics working group and handoff to Hera (D. Richardson)

14:25 Details on expected post-impact dynamics of the system (H. Agrusa)

14:35 Dynamics and Modelling of the Full Two-Body Problem (D. Scheeres)
14:45 Perturbative treatment of the post-impact dynamics of Dimorphos (M. Gaitanas, M. Tsiganis, I. Gkolias)

14:55 Discussion

15:10 Effects of ejecta in the system (re-impacts, material in orbit?)(S. Charnoz)

15:15 Is/was mass shedding due to the primary fast spin possible? (N. Trógolo)

15:25 Morphology of Ejecta after DART impact and implications for Hera (F. Ferrari)

15:35 Long term modelling of boulders dynamics around the Didymos-Dimorphos system (K. Langner, A. Rossi, F. Marzari)

15:45 Could Didymos harbour material? A study of long-term dynamics in Didymos and Dimorphos system (G. Madeira, S. Charnoz)

15:55 Coffee Break

16:25 Dynamics around the Didymos system (X. Fu, S. Soldini)

16:35 Spatial periodic motion of a spacecraft in the environment of Didymos-Dimorphos (G. Voyatzis et al.)

16:45 Questions/Discussion

17:10 Adjourn

October, 12th

Session 5: Dynamics and physical properties modelling (WG 3), continued

09:00 Looking for the link between gravity field, internal structure and system formation (A. Campo Bagatin)

09:05 Direct N-body simulations of Dimorphos’s formation and origin of its oblate shape (H. Agrusa)

09:15 Dynamical origin of Dimorphos from fast spinning Didymos (G. Madeira, S. Charnoz)

09:25 Forming Dimorphos using a combination of SPH and granular N-body codes (J. Wimarsson et al.)

09:35 The collisional history of Didymos (A. Campo Bagatin et al.)

09:45 Questions/Discussion

10:05 Realistic modelling of the internal structure of rubble-piles (P.-Y. Liu et al.)

10:15 FFT based method for efficient gravity field computation in wide space regions (M. Pérez-Molina et al.)

10:25 Internal structure and cohesion analysis of Dimorphos from gravity field and tides (L. Pou)

10:35 Questions / Discussion

10:50 Coffee break

Session 6: Data analysis, exploitation and interpretation (WG 4)

11:20 Replenishing the sparse data cubes from the near infrared spectral imager Hyperscout-H of the Hera mission (B. Grieger)

11:30 3D-GIS + Hera Data Provenance Support: PROVEX (G. Paar)

11:50 Lunch

13:20 The geology and evolution of the Near-Earth binary asteroid system (65803) Didymos (O. Barnouin)

13:35 Topographic roughness (J.-B. Vincent)

13:45 Boulder size distribution and taxonomy (M. Pajola, F. Tusberti)

14:00 Morphological analyses of surface boulders (A. Duchene)

14:15 Boulder cracks from thermal fatigue (A. Luchetti)

14:30 The bearing capacity of asteroid (65803) Didymos estimated from boulder tracks (N. Murdoch)

14:40 Modelling linear polarization of the Didymos system before and after the DART impact (A. Penttilä)

14:55 Coffee Break

15:25 Investigation of Non-Gravitational Acceleration on a Binary Asteroid for the Hera Mission (M. Kanamaru)

15:35 Application of the ATPM to the Hera mission (S. Jackson)

15:45 Thermophysical Modelling of Binary Asteroid Didymos (G. Henry)

15:55 Characterization of (65803) Didymos - Dimorphos System using the HyperScout - H instrument (M. Popescu)

16:05 ASPECT data products as insight into composition and space weathering (T. Kohout)

16:15 Search for meteorites analogous to Didymos through spectral investigation (G. Massa)

16:25 Impact of ISL and LIDAR operations on gravity science results (E. Gramigna)

16:35 A new method to retrieve internal mass anomalies from small bodies gravity data (A. Caldiero)

Session 7 : Meeting summary, AOB

16:45 Meeting highlights, actions from meeting (P. Michel, M. Küppers)

17:15 Any Other Business, next meeting

17:30 End of Meeting

October, 13th

Science Operations Working Group meeting

13 October 2023 - ESTEC, Erasmus auditorium

09:00 Introduction (H. Goldberg)

09:05 Hera Mission Operations Centre Update (S. Lodiot)

09:15 Hera CMOC update (J. Coheur)

09:25 CubeSats Flight Dynamics and Science Operation Centre update (P. Annat)

09:35 Hera SPICE and Cosmographia update (A. Escalante) 09:45 Hera Scientific payload calibration update (G. Kovacs)

10:00 Payload data interface into 3D GIS (G. Paar)

10:15 Deimos observation opportunities with updated Mars fly-by orbit design (S. Sugita)

10:30 Coffee break

Cruise phase operations planning

11:15 Hera trajectory update (P. Muñoz)

11:30 AFC plans for cruise phase (J.-B. Vincent)

11:45 Hyperscout-H plans for cruise phase (J. de León, M. Popescu)

12:00 TIRI plans for cruise phase (T. Okada) 12:15 PALT plans for cruise phase (P. Gordo TBC) 12:30 Discussion

12:45 AOB, next meeting

13:00 Adjourn