Astron. Astrophys. 327, 388-391 (1997)

3. Results

The reflectance spectra of the eight asteroids, normalized at 1 around 5500 Å, are shown in Fig. 1 to Fig. 3. The objects we observed are: 1 Aten (3753 1986 TO ), 4 Apollo (1864 Daedalus, 5786 Talos, 1989 JA, 2063 Bacchus ), and 3 Amor (3352 McAuliffe, 4954 Eric, 5836 1993 MF ).

Fig. 1. Reflectance spectra of the near-Earth Asteroids 1989 JA, 3753 1986 TO, 4954 Eric. The spectra have the typical trend of the S-types.

Fig. 2. Reflectance spectrum of the near-Earth object 2063 Bacchus.

Fig. 3. Spectra of near-Earth asteroids compared with laboratory spectra of ordinary chondrites assemblages. Averaged L4-subtype OC spectrum is superimposed to 1864 Daedalus and 5836 1993 MF ; averaged H4-subtype OC spectrum is compared with 3352 McAuliffe and averaged H6-subtype OC spectrum is superimposed to the spectrum of 5876 Talos.

For each object an indication of the diameter is given (Tholen, 1995). Some of the spectra show some shallow spurious features which are probably due to the division by the solar analog spectrum, that is a non perfect elimination of the solar features, or also to a non perfect cancellation of the atmospheric O₂ bands at 7612 Å and 6880 Å.

© European Southern Observatory (ESO) 1997

Online publication: April 8, 1998
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