Jet-like features near the nucleus of Chiron

J. L. Elliot, C. B. Olkin, E. W. Dunham, C. H. Ford, D. K. Gilmore, D. Kurtz, D. Lazzaro, D. M. Rank, P. Temi, R. M. Bandyopadhyay, J. Barroso, A. Barucci, A. S. Bosh, M. W. Buie, S. J. Bus, C. C. Dahn, D. W. Foryta, William B. Hubbard, D. F. Lopes, R. L. MarcialisS. W. McDonald, R. L. Millis, H. Reitsema, D. G. Schleicher, B. Sicardy, R. P S Stone, L. H. Wasserman

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

CONSIDERED as a comet, the object 2060 Chiron is unusual in two respects: it exhibits outbursts at very large distances from the Sun1-3, and its nucleus is much larger than that of any other known comet4,5. It is, however, similar in size to the recently discovered Kuiper-belt objects6 - a population of objects with orbits beyond Neptune, which are a possible source of short-period comets. This has led to the conjecture that Chiron is related to these objects, but its chaotic orbit has brought it much closer to the Sun7. Here we report observations of a recent stellar occultation by Chiron which permit the identification of several features associated with Chiron's coma. The observation of discrete, jet-like features provides evidence that the coma material originates from just a few, small active areas, rather than from uniform sublimation, and that the particles in at least one of these features have radii greater than 0.25 μm. The observations also suggest the presence of material in the plane of Chiron's orbit and are consistent with a gravitationally bound coma. Finally, the present data, and those from a previous occultation8, constrain the radius of Chiron to lie between 83 and 156 km.

Original languageEnglish (US)
Pages (from-to)46-49
Number of pages4
JournalNature
Volume373
Issue number6509
StatePublished - Jan 5 1995

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Chiron
nuclei
coma
comets
orbits
stellar occultation
Kuiper belt
Neptune (planet)
radii
sublimation

ASJC Scopus subject areas

  • General

Cite this

Elliot, J. L., Olkin, C. B., Dunham, E. W., Ford, C. H., Gilmore, D. K., Kurtz, D., ... Wasserman, L. H. (1995). Jet-like features near the nucleus of Chiron. Nature, 373(6509), 46-49.

Jet-like features near the nucleus of Chiron. / Elliot, J. L.; Olkin, C. B.; Dunham, E. W.; Ford, C. H.; Gilmore, D. K.; Kurtz, D.; Lazzaro, D.; Rank, D. M.; Temi, P.; Bandyopadhyay, R. M.; Barroso, J.; Barucci, A.; Bosh, A. S.; Buie, M. W.; Bus, S. J.; Dahn, C. C.; Foryta, D. W.; Hubbard, William B.; Lopes, D. F.; Marcialis, R. L.; McDonald, S. W.; Millis, R. L.; Reitsema, H.; Schleicher, D. G.; Sicardy, B.; Stone, R. P S; Wasserman, L. H.

In: Nature, Vol. 373, No. 6509, 05.01.1995, p. 46-49.

Research output: Contribution to journalArticle

Elliot, JL, Olkin, CB, Dunham, EW, Ford, CH, Gilmore, DK, Kurtz, D, Lazzaro, D, Rank, DM, Temi, P, Bandyopadhyay, RM, Barroso, J, Barucci, A, Bosh, AS, Buie, MW, Bus, SJ, Dahn, CC, Foryta, DW, Hubbard, WB, Lopes, DF, Marcialis, RL, McDonald, SW, Millis, RL, Reitsema, H, Schleicher, DG, Sicardy, B, Stone, RPS & Wasserman, LH 1995, 'Jet-like features near the nucleus of Chiron', Nature, vol. 373, no. 6509, pp. 46-49.
Elliot JL, Olkin CB, Dunham EW, Ford CH, Gilmore DK, Kurtz D et al. Jet-like features near the nucleus of Chiron. Nature. 1995 Jan 5;373(6509):46-49.
Elliot, J. L. ; Olkin, C. B. ; Dunham, E. W. ; Ford, C. H. ; Gilmore, D. K. ; Kurtz, D. ; Lazzaro, D. ; Rank, D. M. ; Temi, P. ; Bandyopadhyay, R. M. ; Barroso, J. ; Barucci, A. ; Bosh, A. S. ; Buie, M. W. ; Bus, S. J. ; Dahn, C. C. ; Foryta, D. W. ; Hubbard, William B. ; Lopes, D. F. ; Marcialis, R. L. ; McDonald, S. W. ; Millis, R. L. ; Reitsema, H. ; Schleicher, D. G. ; Sicardy, B. ; Stone, R. P S ; Wasserman, L. H. / Jet-like features near the nucleus of Chiron. In: Nature. 1995 ; Vol. 373, No. 6509. pp. 46-49.
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abstract = "CONSIDERED as a comet, the object 2060 Chiron is unusual in two respects: it exhibits outbursts at very large distances from the Sun1-3, and its nucleus is much larger than that of any other known comet4,5. It is, however, similar in size to the recently discovered Kuiper-belt objects6 - a population of objects with orbits beyond Neptune, which are a possible source of short-period comets. This has led to the conjecture that Chiron is related to these objects, but its chaotic orbit has brought it much closer to the Sun7. Here we report observations of a recent stellar occultation by Chiron which permit the identification of several features associated with Chiron's coma. The observation of discrete, jet-like features provides evidence that the coma material originates from just a few, small active areas, rather than from uniform sublimation, and that the particles in at least one of these features have radii greater than 0.25 μm. The observations also suggest the presence of material in the plane of Chiron's orbit and are consistent with a gravitationally bound coma. Finally, the present data, and those from a previous occultation8, constrain the radius of Chiron to lie between 83 and 156 km.",
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AU - Elliot, J. L.

AU - Olkin, C. B.

AU - Dunham, E. W.

AU - Ford, C. H.

AU - Gilmore, D. K.

AU - Kurtz, D.

AU - Lazzaro, D.

AU - Rank, D. M.

AU - Temi, P.

AU - Bandyopadhyay, R. M.

AU - Barroso, J.

AU - Barucci, A.

AU - Bosh, A. S.

AU - Buie, M. W.

AU - Bus, S. J.

AU - Dahn, C. C.

AU - Foryta, D. W.

AU - Hubbard, William B.

AU - Lopes, D. F.

AU - Marcialis, R. L.

AU - McDonald, S. W.

AU - Millis, R. L.

AU - Reitsema, H.

AU - Schleicher, D. G.

AU - Sicardy, B.

AU - Stone, R. P S

AU - Wasserman, L. H.

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N2 - CONSIDERED as a comet, the object 2060 Chiron is unusual in two respects: it exhibits outbursts at very large distances from the Sun1-3, and its nucleus is much larger than that of any other known comet4,5. It is, however, similar in size to the recently discovered Kuiper-belt objects6 - a population of objects with orbits beyond Neptune, which are a possible source of short-period comets. This has led to the conjecture that Chiron is related to these objects, but its chaotic orbit has brought it much closer to the Sun7. Here we report observations of a recent stellar occultation by Chiron which permit the identification of several features associated with Chiron's coma. The observation of discrete, jet-like features provides evidence that the coma material originates from just a few, small active areas, rather than from uniform sublimation, and that the particles in at least one of these features have radii greater than 0.25 μm. The observations also suggest the presence of material in the plane of Chiron's orbit and are consistent with a gravitationally bound coma. Finally, the present data, and those from a previous occultation8, constrain the radius of Chiron to lie between 83 and 156 km.

AB - CONSIDERED as a comet, the object 2060 Chiron is unusual in two respects: it exhibits outbursts at very large distances from the Sun1-3, and its nucleus is much larger than that of any other known comet4,5. It is, however, similar in size to the recently discovered Kuiper-belt objects6 - a population of objects with orbits beyond Neptune, which are a possible source of short-period comets. This has led to the conjecture that Chiron is related to these objects, but its chaotic orbit has brought it much closer to the Sun7. Here we report observations of a recent stellar occultation by Chiron which permit the identification of several features associated with Chiron's coma. The observation of discrete, jet-like features provides evidence that the coma material originates from just a few, small active areas, rather than from uniform sublimation, and that the particles in at least one of these features have radii greater than 0.25 μm. The observations also suggest the presence of material in the plane of Chiron's orbit and are consistent with a gravitationally bound coma. Finally, the present data, and those from a previous occultation8, constrain the radius of Chiron to lie between 83 and 156 km.

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