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Acta Optica Sinica, Volume. 45, Issue 18, 1828012(2025)

Digital Simulation and Validation of Asteroid Light Curve Under Multiple Scattering (Invited)

Taoze Ying1,2, Huan Xie1,2, Ming Yang1,2、*, Yifan Wang1,2, Hongji Ni1,2, and Xiaohua Tong1,2
Author Affiliations
  • 1College of Surveying and Geo-Informatics, Tongji University, Shanghai 200092, China
  • 2Shanghai Key Laboratory of Space Mapping and Remote Sensing for Planetary Exploration, Tongji University, Shanghai 200092, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
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    References (26)
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    Figures & Tables(12)
    Schematic of J2000 ecliptic celestial coordinate system

    Fig. 1. Schematic of J2000 ecliptic celestial coordinate system

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    Software architecture of proposed asteroid digital simulation system

    Fig. 2. Software architecture of proposed asteroid digital simulation system

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    Target observation period (during the approach phase of explorer OSIRIS-REx mission to detect asteroid Bennu)[21]

    Fig. 3. Target observation period (during the approach phase of explorer OSIRIS-REx mission to detect asteroid Bennu)[21]

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    Shape reference model (shape model of the asteroid Bennu at 0.8 m resolution)

    Fig. 4. Shape reference model (shape model of the asteroid Bennu at 0.8 m resolution)

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    Actual and simulated images of asteroid Bennu (taking the No. 8 observation period as an example). (a)‒(d) Observation images; (e)‒(h) simulated images

    Fig. 5. Actual and simulated images of asteroid Bennu (taking the No. 8 observation period as an example). (a)‒(d) Observation images; (e)‒(h) simulated images

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    Image segmentation results (taking the No. 8 observation period as an example). (a) Image of target asteroid; (b) image of space background

    Fig. 6. Image segmentation results (taking the No. 8 observation period as an example). (a) Image of target asteroid; (b) image of space background

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    Simulated light curve based on the asteroid digital simulation system and observed light curve (taking the No. 8 observation period as an example)

    Fig. 7. Simulated light curve based on the asteroid digital simulation system and observed light curve (taking the No. 8 observation period as an example)

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    Simulated light curve based on DAMIT software and observed light curve (taking the No. 8 observation period as an example)

    Fig. 8. Simulated light curve based on DAMIT software and observed light curve (taking the No. 8 observation period as an example)

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    • Table 1. Asteroid orbital parameters for target observation periods[21]

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      Table 1. Asteroid orbital parameters for target observation periods[21]

      Observation period numberObservation starting timeStarting distance of the probe from the asteroid /kmStarting solar phase angle /(°)Ending distance of the probe from the asteroid /kmEnding solar phase angle /(°)
      12018-11-02197.745.19191.184.58
      22018-11-03191.184.58177.633.05
      32018-11-05177.633.05164.844.27
      42018-11-08164.844.27159.117.37
      52018-11-09159.117.37151.3617.84
      62018-11-12151.3617.84148.9819.05
      72018-11-13148.9819.05136.9513.91
      82018-11-16136.9513.91122.008.73
      92018-11-19122.008.73103.993.46

    • Table 2. Parameters of the shape reference model[25-26]

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      Table 2. Parameters of the shape reference model[25-26]

      ParameterValue
      Extent /(m×m×m)(563.87±0.17)×(536.09±0.17)×(498.42±0.17)
      Volume /km30.0616±0.0007
      Mass /kg(7.329±0.009)×1010
      Mean density /(g/cm3)1.190±0.013
      Pole /(°)RA: 85.34±0.2; DEC: -60.15±0.2
      Period /h4.296

    • Table 3. Simulation parameters of the simulation platform

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      Table 3. Simulation parameters of the simulation platform

      ParameterValue
      Asteroid number101955
      Body diameter /m500
      Focal length /mm629
      Aperture /mm200
      Exposure time /ms20
      Image resolution /(µrad/pixel)13.5
      Field of view /[(°)×(°)]0.8×0.8
      Pixel size /(µm×µm)6.5×8.5
      Image output format.jpg
      Image output size /(pixel×pixel)5120×3840
      Target occupancy /pixel300‒550

    • Table 4. Comparison of asteroid light curve simulation results

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      Table 4. Comparison of asteroid light curve simulation results

      Simulation softwareShape reference modelLight scattering modelAverage RRMSE
      Module Lcgenerator of DAMIT0.8 m BennuLambert & Lommel‒Seeliger0.035
      Software developed in this paper0.8 m BennuOren‒Nayar0.002
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    Taoze Ying, Huan Xie, Ming Yang, Yifan Wang, Hongji Ni, Xiaohua Tong. Digital Simulation and Validation of Asteroid Light Curve Under Multiple Scattering (Invited)[J]. Acta Optica Sinica, 2025, 45(18): 1828012

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Jun. 5, 2025

    Accepted: Aug. 19, 2025

    Published Online: Sep. 16, 2025

    The Author Email: Ming Yang (myang@tongji.edu.cn)

    DOI:10.3788/AOS251218

    CSTR:32393.14.AOS251218

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology