Geminga is a well-known pulsar located in the constellation Gemini, and it was discovered in 1972. Pulsars are highly magnetized, rotating neutron stars that emit beams of electromagnetic radiation, and their rotation speeds can vary. If there have been any updates or more precise measurements regarding Geminga's rotation speed since then, I wouldn't be aware of them. It's always a good idea to consult the latest scientific literature or astronomical sources for the most up-to-date information.