Rotation period of 234 Barbara, a further slowly spinning asteroid
Abstract
The S-type asteroid 234 Barbara was observed photoelectrically for variations at CTIO, Chile, during the opposition in September 1979. A rotation period of P=26h5±0h.1(≙ 1d.104 ± 0d.004) was derived, with a lightcurve amplitude of at least Δm ≧ 0m.24. The lightcurve seems to show double wave characteristic, though the primary maximum and one of the minima are not observed directly. Absolute magnitude is Vbar(1,0) =9m.34 with B-V = +0m.92 and U-B=+0m.48; a phase coefficient of β = 0.035 mag/deg was derived.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1981
- Bibcode:
- 1981A&A....96..302S
- Keywords:
-
- Asteroids;
- Astronomical Photometry;
- Light Curve;
- Planetary Rotation;
- A Stars;
- Electrophotometers;
- Periodic Variations;
- ASTEROIDS;
- SPIN;
- ROTATION;
- PERIOD;
- 234 BARBARA ASTEROID;
- S ASTEROIDS;
- PHOTOELECTRIC OBSERVATIONS;
- LIGHT CURVE;
- AMPLITUDE;
- ABSOLUTE MAGNITUDE;
- PHOTOMETRY;
- DATA;
- COLOR;
- Astronomy; Asteroids