PSR B1259−63/LS 2883

The pair has an eccentric orbit that is inclined to the line of sight from Earth by about 36°, leading to a 40-day-long eclipse each time the pulsar passes behind the star.

It emits very high energy gamma rays that vary on a time scale of several days.

The rate of rotation is about 280 km/s at the equator, or 70% of the breakup velocity.

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