Multi-band Polarimetry of the Lunar Surface. II. Grain Size Evolutionary Pathway

Jeong, Minsup; Choi, Young‐Jun; Kim, Sungsoo S.; Kim, Il-Hoon; Shkuratov, Yuriy; Yang, Hyunah

doi:10.3847/1538-4357/aae9ed

Cited by 7 publications

(7 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1999 . The particle size distribution of the lunar regolith has been investigated by measuring albedo and P max (Dollfus 1999 ;Jeong et 2018 ). Although the P max measurements are important for estimating the particle size and porosity, it is not easy to derive the P max of asteroids because the low from ground-based observatories.…”

Section: Albedo-p Max Relationmentioning

confidence: 99%

Polarimetric properties of the near-Sun asteroid (155140) 2005 UD in comparison with other asteroids and meteoritic samples

Ishiguro

Bach

Geem

et al. 2021

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

The investigation of asteroids near the Sun is important for understanding the final evolutionary stage of primitive Solar system objects. A near-Sun asteroid, (155140) 2005 UD, has orbital elements similar to those of (3200) Phaethon (the target asteroid for the JAXA’s DESTINY+ mission). We conducted photometric and polarimetric observations of 2005 UD and found that this asteroid exhibits a polarization phase curve similar to that of Phaethon over a wide range of observed solar phase angles (α = 20-105○) but different from those of (101955) Bennu and (162173) Ryugu (asteroids composed of hydrated carbonaceous materials). At a low phase angle (α ≲ 30○), the polarimetric properties of these near-Sun asteroids (2005 UD and Phaethon) are consistent with anhydrous carbonaceous chondrites, while the properties of Bennu are consistent with hydrous carbonaceous chondrites. We derived the geometric albedo, pV ∼ 0.1 (in the range of 0.088-0.109); mean V-band absolute magnitude, HV = 17.54 ± 0.02; synodic rotational period, Trot = 5.2388 ± 0.0022 hours (the two-peaked solution is assumed); and effective mean diameter, Deff = 1.32 ± 0.06 km. At large phase angles (α ≳ 80○), the polarization phase curve are likely explained by the dominance of large grains and the paucity of small micron-sized grains. We conclude that the polarimetric similarity of these near-Sun asteroids can be attributed to the intense solar heating of carbonaceous materials around their perihelia, where large anhydrous particles with small porosity could be produced by sintering.

show abstract

Section: Albedo-p Max Relationmentioning

confidence: 99%

Polarimetric properties of the near-Sun asteroid (155140) 2005 UD in comparison with other asteroids and meteoritic samples

Ishiguro

Bach

Geem

et al. 2021

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…The PolCube concept and design, based on PolCam (Jeong et al, 2018;Sim et al, 2019), is described in Figure 1 and Table 1.…”

Section: Polcube Instrument Designmentioning

confidence: 99%

“…To further the goal of high capability and low cost, we consider a modification to the Wide-Angle Polarimetric Camera (PolCam) (Jeong et al, 2018) that can reliably and accurately retrieve aerosol optical and microphysical properties across the VIS-NIR. PolCam was developed for the KPLO mission and will make lunar polarimetric observations beginning in 2023 (Ju, 2017;Jeong et al, 2018;Sim et al, 2019). The PolCam instrument was designed to measure the lunar bidirectional reflectance and polarized reflectance distribution functions (BRDF and BPDF) and to retrieve lunar grain size.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Aerosol and Ocean Properties From the PolCube CubeSat Polarimeter

Stamnes

Baize

Bontempi

et al. 2021

Front. Remote Sens.

Self Cite

View full text Add to dashboard Cite

We quantify the performance of aerosol and ocean remote sensing products from the PolCube instrument using a previously developed polarimeter retrieval algorithm based on optimal estimation. PolCube is a modified version of the PolCam lunar instrument on the Korea Pathfinder Lunar Orbiter that has been optimized for Earth-Science observations of aerosol, ocean, and thin cloud optical properties. The objective of the PolCube instrument is to retrieve detailed fine-mode (pollution and smoke) and coarse-mode (sea-salt and dust) aerosol properties over the ocean for a range of light to heavy aerosol loadings using its polarimetric-imaging capability at multiple angles and wavelengths from 410−865 nm. An additional objective is to discriminate aerosols from thin clouds. PolCube’s retrieval performance of aerosol optical and microphysical properties and ocean products is quantitatively assessed. We estimate that PolCube can retrieve total aerosol optical depth at 555 nm (AOD555) within ±0.068, fine-mode AOD555 within ±0.078, and fine-mode single-scattering albedo within ±0.036, where all uncertainties are expressed as one standard deviation (1σ). PolCube’s accurate and high-resolution aerosol-retrieval products will provide unique spatial and temporal coverage of the Earth that can be used synergistically with other instruments, such as the Geostationary Environmental Monitoring Spectrometer to improve air-quality forecasting.

show abstract

“…The albedo-𝑃 max relation also depends on particle size and porosity Geake & Dollfus 1986;Worms et al 1999. The particle size distribution of the lunar regolith has been investigated by measuring albedo and 𝑃 max (Dollfus 1999;Jeong et al 2018). Although the 𝑃 max measurements are important for estimating the particle size and porosity, it is not easy to derive the 𝑃 max of asteroids because of the low visibility from ground-based observatories.…”

Section: Albedo-𝑃 Max Relationmentioning

confidence: 99%

Polarimetric Properties of the Near--Sun Asteroid (155140) 2005 UD in Comparison with Other Asteroids and Meteoritic Samples

Ishiguro,

Bach,

Geem

et al. 2021

Preprint

View full text Add to dashboard Cite

The investigation of asteroids near the Sun is important for understanding the final evolutionary stage of primitive solar system objects. A near-Sun asteroid, (155140) 2005 UD, has orbital elements similar to those of (3200) Phaethon (the target asteroid for the JAXA's DESTINY + mission). We conducted photometric and polarimetric observations of 2005 UD and found that this asteroid exhibits a polarization phase curve similar to that of Phaethon over a wide range of observed solar phase angles (𝛼 = 20−105 • ) but different from those of (101955) Bennu and ( 162173) Ryugu (asteroids composed of hydrated carbonaceous materials). At a low phase angle (𝛼 30 • ), the polarimetric properties of these near-Sun asteroids (2005 UD and Phaethon) are consistent with anhydrous carbonaceous chondrites, while the properties of Bennu are consistent with hydrous carbonaceous chondrites. We derived the geometric albedo, 𝑝 V ∼ 0.1 (in the range of 0.088−0.109); mean 𝑉-band absolute magnitude, 𝐻 V = 17.54 ± 0.02; synodic rotational period, 𝑇 rot = 5.2388 ± 0.0022 hours (the two-peaked solution is assumed); and effective mean diameter, 𝐷 eff = 1.32 ± 0.06 km. At large phase angles (𝛼 80 • ), the polarization phase curve are likely explained by the dominance of large grains and the paucity of small micron-sized grains. We conclude that the polarimetric similarity of these near-Sun asteroids can be attributed to the intense solar heating of carbonaceous materials around their perihelia, where large anhydrous particles with small porosity could be produced by sintering.

show abstract

Multi-band Polarimetry of the Lunar Surface. II. Grain Size Evolutionary Pathway

Cited by 7 publications

References 21 publications

Polarimetric properties of the near-Sun asteroid (155140) 2005 UD in comparison with other asteroids and meteoritic samples

Polarimetric properties of the near-Sun asteroid (155140) 2005 UD in comparison with other asteroids and meteoritic samples

Simultaneous Aerosol and Ocean Properties From the PolCube CubeSat Polarimeter

Polarimetric Properties of the Near--Sun Asteroid (155140) 2005 UD in Comparison with Other Asteroids and Meteoritic Samples

Contact Info

Product

Resources

About