Article Dans Une Revue Space Science Reviews Année : 2023

The Psyche Magnetometry Investigation

Résumé

The objective of the Psyche Magnetometry Investigation is to test the hypothesis that asteroid (16) Psyche formed from the core of a differentiated planetesimal. To address this, the Psyche Magnetometer will measure the magnetic field around the asteroid to search for evidence of remanent magnetization. Paleomagnetic measurements of meteorites and dynamo theory indicate that a diversity of planetesimals once generated dynamo magnetic fields in their metallic cores. Likewise, the detection of a strong magnetic moment ( $>2\times10^{14}~\text{Am}^{2}$ > 2 × 10 14 Am 2 ) at Psyche would likely indicate that the body once generated a core dynamo, implying that it formed by igneous differentiation. The Psyche Magnetometer consists of two three-axis fluxgate Sensor Units (SUs) mounted 0.7 m apart along a 2.15-m long boom and connected to two Electronics Units (EUs) located within the spacecraft bus. The Magnetometer samples at up to 50 Hz, has a range of $\pm80{,}000~\text{nT}$ ± 80 , 000 nT , and an instrument noise of $39~\text{pT}\,\text{axis}^{-1}\,3\sigma $ 39 pT axis − 1 3 σ integrated over 0.1 to 1 Hz. The two pairs of SUs and EUs provide redundancy and enable gradiometry measurements to suppress noise from flight system magnetic fields. The Magnetometer will be powered on soon after launch and acquire data for the full duration of the mission. The ground data system processes the Magnetometer measurements to obtain an estimate of Psyche’s dipole moment.

Fichier principal
Vignette du fichier
Weiss_2023_SpaceSciRev_219_22.pdf (2.16 Mo) Télécharger le fichier
Origine Publication financée par une institution
Licence

Dates et versions

hal-05499867 , version 1 (09-02-2026)

Licence

Identifiants

Citer

Benjamin P Weiss, José M G Merayo, Jodie B Ream, Rona Oran, Peter Brauer, et al.. The Psyche Magnetometry Investigation. Space Science Reviews, 2023, 219 (3), pp.22. ⟨10.1007/s11214-023-00965-z⟩. ⟨hal-05499867⟩
63 Consultations
87 Téléchargements

Altmetric

Partager

  • More