PRIMITIVE BODY EXPLORATION IN THE SOLAR SYSTEM AND ASTROBIOLOGY
Hajime YANO
Planetary Science Division, Institute of Space and Astronautical Science
3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 JAPANFax: 042-759-8457 E-mail: yano@planeta.sci.isas.ac.jp(Received 20 August 2002, Accepted 21 August 2002)
Key Words: Asteroids, Astrobiology, Comets, Leonids, Meteors, Meteorites, Micrometeoroids, MUSES-C, Solar
System Minor Bodies, Planetary Exploration,
Abstract
Origins of planetary systems and life are common goals among astronomers, biologists and planetary scientists.
In the context of planetary exploration, astrobiology can be defined an interdisciplinary subject which answers fp, ne
and fl parameters for the Drake-Sagan equation. The new concept of habitable zones also demands better understandingof primitive bodies of the solar system while “cosmic dust” is one of the key components that relates all theevolutionary stages (from the birth to the death) of the planetary systems and terrestrial life, for both the panspermina
theory and the Urey-Miller paradigm. In particular, it is essential for us to properly conduct optical and spectroscopic
observations of meteor showers such as the Leonid MAC and in-situ measurement and sample return missions to minor
bodies such as MUSES-C, in order to connect between ground observation data of asteroids and comets and analytical
data of cosmic dust and meteorite samples. For the latter, organic and prebiotic material analyses are important for bothscientific outputs and space quarantine issues. Thus the primitive body exploration program should seek morecollaboration with the astrobioloy community not only within the current program but also for new missions in the
coming decade.

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18.

H\Õ]^[_/TÐ_~References
1. Dick, S. J. Life on Other Worlds: The 20th-Century
Extraterrestrial Life Debate. pp. 290, Cambridge
University Press, Cambridge, UK (1998)
2. Ward, P. D. and Brownlee, D. E. Rare Earth: Why
Complex Life is Uncommon in the Universe. pp.
333, Copernicus, NY, USA (2000)
3. Gonzalez, G., Brownlee, D. E. and Ward, P. D.
Refuge for life in a hostile universe. Scientific
American 10, 54-59 (2001)
4. Love S. G. and Brownlee, D. E. A direct
measurement of the terrestrial mass accretion rate ofcosmic dust. Science, 262, 550-553 (1993)
5. Yano, H., Japanese contribution to in-situ meteoroidand debris measurement in the near Earth space.
Earth Planets Space, 51, 1233-1246 (1999)
6. Huebner, W. F. (Ed.) Physics and Chemistry of
Comets. pp. 376, Springer-Verlag, Heidelberg,
Germany (1990)
7. Delsemme, A. H. Cometary origin of the biosphere.
Icarus, 146, 313-325 (2000)
8. Chyba C. F. and Sagan C. Comets as a source ofprebiotic organic molecules for the early Earth. In
Comets and the Origin and Evolution of Life (Eds.
Thomas P. J., Chyba C. F. and McKay C. P.) pp.
147-173, Springer-Verlag, NY. USA (1997)
9. Brearley, A. J. and Jones, R. H. Chondritic
meteorites. In Planetary Materials (Ed. Papike, J. J.)
pp. 3.01-3.398 Mineralogical Society of America,
Washington, D.C., USA (1998)
11. Hiroi, T., Zolensky, M. E. and Pieters, C. M. The
Tagish Lake meteorite: A possible sample from a Dtype asteroid. Science, 293, 2234-2236 (2001)
12. Zolensky, M. E., Bodnar, R. J., Gibson Jr, E. K. et
al. Asteroidal water within fluid inclusion-bearing
halite in an H5 chondrite Monahans. Science, 285,
1377 (1998)
13. Abe, S., Yano, H., Ebizuka, N., Kasuga, T.,
Sugimoto, M., and Watanabe, J. Ultra-violet
spectroscopy of hydroxyl features in the 2001
Leonid meteor storm. Astrobiology, submitted.
14. Greenberg, M. The core-mantle model of interstellar
grains and the cosmic dust connection. In
Interstellar Dust (Eds., Allamandola L. J. and

19.
20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

- 156 -

Tielens, A. G. G. M.) pp. 345-355, Dordrecht:
Kluwer Academic Publ. (1989)
Jenniskens, P., Butow, S. J. and Fonda, M. The 1999
Leonid Multi-Instrument Aircraft Campaign – Anearly review. Earth, Moon & Planets, 82-83, 1-26
(2000)
Alvarez, L. W., Alvarez, W., Asaro, F. and Michel,
H. V. Extraterrestrial cause for the CretaceousTertiary extinction. Science, 208, 1095-1108 (1980)
Rampino, M. R. and Haggerty, B. M.
Extraterrestrial impacts and mass extinctions of life.
In Hazards due to Comets & Asteroids (Ed. Gehrels,T.) pp. 827-857 The University of Arizona Press,
AZ, USA (1994)
Tholen, D. J. and Barucci, M. A., Asteroid
taxonomy. In Asteroids II (Eds. Binzel, R. P.,
Gehrels, T. and Matthews, M. S.) pp. 298-315, The
University of Arizona Press, AZ, USA (1989)A-ìN
NOcIpp. 30, 
 (2001)
Kawaguchi, J., Uesugi, K. and Fujiwara, A.
Readiness of the MUSES-C project and thespacecraft flight model status. Proc. 22nd ISTS,
2000-o-3-06v (2000)
Binzel, R. P., et al., MUSES-C target asteroid
1998SF36: A reddened ordinary chodnrite.
Meteoritics & Planet. Sci. 36 (2001)
Clark, B. E., Lucey, P., Helfenstein, P., Bell III, J. F.,
Peterson, C., Veverka, J., McConnochie, T.,
Robinson, M., Bussey, B., Murchie, S., Izenberg, N.,
and Chapman, C. Meteoritics & Planet. Sci., 36,
1617-1638 (2001)
Sasaki, S., Nakamura, K., Hamabe, Y., Kurahashi,E., and Hiroi, T. Production of iron nanoparticles bylaser irradiation in a simulation of lunar-like space
weathering. Nature, 410, 555-557 (2001)
Yano, H., Hasegawa, S., Abe, M., and Fujiwara, A.,
Asteroidal surface sampling by the MUSES-C
spacecraft. Proc. Asteroids, Comets, Meteors 2002,
ESA-CP, in press.
Space Studies Board-National Research Council,
Evaluating the Biological Potential in Samples
Returned from Planetary Satellites and Small Solar
System Bodies. pp. 100, National Academy Press,
Washington, D.C., USA (1998)
- `aXb-c5Vd-,
Á5(2-· OPQ
RSä-K<àQSþY42á
e pp. 335-344,     (2001)
Sears, D. W. G., Allen, C., Britt, D., Yano, H. et al.,The case for near-Earth asteroid sample return.
Amer. Inst. Aeronauticas & Astronautics, submitted(2001)
Yano, H., Abe, M., Yamakawa, H., Yoshikawa, M.,
and Fujiwara, A. The Family Mission: Multiple flybys and sample returns to the main belt asteroid
families. Abst. Asteroids 2001, 131 (2001)
Kawaguchi, J., A comet nucleus sample return
mission using solar electric Earth gravity assist.
Adv. Space Res., 29, 1215-1220 (2002)