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Hubble Space Telescope Observations of Active Asteroid (101955) Bennu — arXiv:2610.07636

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.07636
License (as archived): CC0-1.0
Archived: 2026-10-07T18:53:40.592Z
SHA-256 of the archived text: b374fc078dce7e68043f8635072a580f26fe18f9ec4e26a7e9c0feea775aae32
Stable URL of this page: https://metraipolis.com/documento/dc_92ee83fc7220

How to cite

Hubble Space Telescope Observations of Active Asteroid (101955) Bennu — arXiv:2610.07636 — arXiv (en), https://arxiv.org/abs/2610.07636 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_92ee83fc7220 (Metraipolis archive dc_92ee83fc7220, sha256 b374fc078dce7e68043f8635072a580f26fe18f9ec4e26a7e9c0feea775aae32)

BibTeX

@misc{dc92ee83fc7220,
  title = {Hubble Space Telescope Observations of Active Asteroid (101955) Bennu — arXiv:2610.07636},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.07636},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_92ee83fc7220; sha256 b374fc078dce7e68043f8635072a580f26fe18f9ec4e26a7e9c0feea775aae32},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.07636. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Measurements from NASA's OSIRIS-REx spacecraft revealed (101955) Bennu as a member of the active asteroid class. These objects exhibit transient, comet-like activity, commonly producing particle trails best observed from a vantage point close to the projected orbit plane. Accordingly, we obtained deep, high resolution observations of Bennu at orbit plane crossing in 2023, using the Hubble Space Telescope. We find no evidence for ejected material, and place model-dependent limits to the mass loss of dM/dt < 0.12 kg/s from an analysis of the near-nucleus surface brightness profiles and dM/dt < 6e-3 kg/s from the absence of a measurable particle trail. These limits are one to two orders of magnitude smaller than rates of mass loss measured remotely in other active asteroids and raise the possibility that low activity in many or most asteroids might fall beneath the prevailing thresholds offered by remote observations. Taking a still smaller mass loss rate estimated from OSIRIS-REx data, we calculate a specific rate L = 1e-7 kg/km2/s and extrapolate to the entire main-belt asteroid population. We estimate a cumulative dust production rate 850/r_min**1/2 [kg/s], where r_min is the minimum asteroid radius in meters. For r_min > 1 m, this is <1% to 10% of the rate needed to sustain the Zodiacal cloud in steady state.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.EP, nuovi lavori del giorno).
Categorie arXiv: Earth and Planetary Astrophysics (astro-ph.EP).
Pagina del lavoro: https://arxiv.org/abs/2610.07636 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-07T18:12:31.407Z dalla pagina https://arxiv.org/list/astro-ph.EP/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).