New magnitude-phase dependencies including extremely small phase angles (α< 1deg) of two dark asteroids (59) Elpis and (130) Electra and of one S-type asteroid (79) Eurynome were obtained at the 1993 and 1994 oppositions. Values of the H G parameters and the phase linear coefficients β for these asteroids have been determined. very small amplitude of the opposition effect was discovered for (59) Elpis. Observations of (65) Cybele over two nights defined its period of rotation as 4.036h.
Astronomy and Astrophysics Supplement Series
- Pub Date:
- February 1996
- PLANETS AND SATELLITES: 59 ELPIS;
- 130 ELECTRA;
- 79 EURYNOME;
- 65 CYBELE