The famous equation used to search for alien civilizations has now inspired a new formula to hunt for alien artifacts within our solar system. My emphasis.
I must have blinked and missed it - the Drake look-a-like.
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8. Conclusion
Co-orbitals are attractive targets for SETI searches because of their proximity. We should move forthrightly toward observing them, both in the electromagnetic spectrum and planetary radar, as well as visiting them with probes. The most attractive target is Earth's constant companion 2016 HO3, the smallest, closest, and most stable (known) quasi-satellite of Earth. Getting there from Earth's orbit requires a delta-
v of about 4.5 km s−1. It approaches Earth annually, in October. China has announced they are going to send a probe to 2016 HO3 (Xinhua
2019).
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Not even mentioned in the Conclusion.
Cat
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