Dynamical evolution and thermal history of asteroids (3200) Phaethon and (155140) 2005 UD

MacLennan, Eric; Τόλιου, Αθανασία; Granvik, Mikael

doi:10.1016/j.icarus.2021.114535

Cited by 35 publications

(22 citation statements)

References 91 publications

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“…Nonetheless, 2005 UD is a likely parent body of the Daytime Sextantid meteor shower whose dynamical age of τ > 10 4 yr was estimated by numerical simulations (Jakubík & Neslušan 2015). The dynamical evolution of 2005 UD numerically investigated by MacLennan et al (2021) reveals that the perihelion of 2005 UD was also located at q ≈ 0.14 au approximately 1.5 × 10 4 yr ago. Therefore, we have no reason to rule out the possibility that a dust trail was produced along the trajectory of 2005 UD by the electrostatic lofting mechanism 1.5 × 10 4 yr ago, which does not contradict the dynamical age of the Daytime Sextantids.…”

Section: Discussionmentioning

confidence: 94%

Electrostatic Dust Ejection From Asteroid (3200) Phaethon With the Aid of Mobile Alkali Ions at Perihelion

Kimura,

Ohtsuka,

Kikuchi

et al. 2022

Preprint

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The asteroid (3200) Phaethon is known to be the parent body of the Geminids, although meteor showers are commonly associated with the activity of periodic comets. What is most peculiar to the asteroid is its comet-like activity in the ejection of micrometer-sized dust particles at every perihelion passage, while the activity of the asteroid has never been identified outside the near-perihelion zone at 0.14 au from the Sun. From the theoretical point of view, we argue that the activity of the asteroid is well explained by the electrostatic lofting of micrometer-sized dust particles with the aid of mobile alkali ions at high temperatures. The mass-loss rates of micrometer-sized particles from the asteroid in our model is entirely consistent with the values inferred from visible observations of Phaethon's dust tail. For millimeter-sized particles, we predict three orders of magnitudes higher mass-loss rates, which could also account for the total mass of the Geminid meteoroid stream by the electrostatic lofting mechanism.

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Section: Discussionmentioning

confidence: 94%

Electrostatic Dust Ejection From Asteroid (3200) Phaethon With the Aid of Mobile Alkali Ions at Perihelion

Kimura,

Ohtsuka,

Kikuchi

et al. 2022

Preprint

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“…et al ( 2007 ) noticed that the colour of 2005 UD changed with rotation, probably because of the surficial heterogeneity, and further speculated that the heterogeneity could result from fragmentation or collisional processes that occurred on the precursor of Phaethon and the 2005 UD. Ryabov a, Avdyushe v & Williams ( 2019 ) asserted that 2005 UD is not a member of the Phaethon-Geminid complex based on their dynamical analysis o v er the last 5000 yr; ho we ver, Hanu š et al ( 2016 ), and more recently MacLennan, Toliou & Granvik ( 2021 ), suggested that the two objects might have separated from a common parent body a long time ago, approximately 10 5 yr ago or, more likely, even before this epoch. On the contrary, Kareta et al ( 2021 ) argued that the similar spectral property is only by coincidence from the analysis of their near-infrared spectrum.…”

Section: Introductionmentioning

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

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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.

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“…However, the specific source region, presumably in the main asteroid belt, is unknown. Suggested sources include the large B-type asteroid 2 Pallas (de León et al 2010) and, more likely, a collisional family in the inner asteroid belt (MacLennan et al 2021). The km-sized asteroid 2005 UD appears dynamically related to Phaethon (Ohtsuka et al 2006) and is coincidentally also a B-type object (Jewitt and Hsieh 2006), (although recent observations show dissimilarity in the near infrared; Kareta et al 2021).…”

Section: Thermal Breakdown: (3200) Phaethonmentioning

confidence: 99%

The Asteroid-Comet Continuum

Jewitt¹,

Hsieh²

2022

Preprint

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The practical distinctions between asteroids and comets, viewed as products of accretion on either side of the snow line, are less clear-cut than previously understood. In this chapter, we discuss the numerous solar system populations which have physical and dynamical properties that conflict with any simple diagnosis of their nature and origin. Studies of these so-called "continuum" or "transition objects", which include many of the most intriguing bodies in the solar system, have implications for a broad range of scientific topics from the demise of comets and the activation of asteroids to the production of interplanetary debris and the origin of the terrestrial planet volatiles. We present an overview of the current state of knowledge concerning the asteroid-comet continuum and discuss the numerous physical processes behind the activity shown by small bodies in the solar system.

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Dynamical evolution and thermal history of asteroids (3200) Phaethon and (155140) 2005 UD

Cited by 35 publications

References 91 publications

Electrostatic Dust Ejection From Asteroid (3200) Phaethon With the Aid of Mobile Alkali Ions at Perihelion

Electrostatic Dust Ejection From Asteroid (3200) Phaethon With the Aid of Mobile Alkali Ions at Perihelion

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

The Asteroid-Comet Continuum

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