Ser Scot A Ellison Posted September 15, 2019 Share Posted September 15, 2019 16 hours ago, Starkess said: I was surprised to see that paper claim the second interstellar object, as I think CNEOS 2014-01-08 was already identified as an interstellar asteroid by Siraj & Loeb. I never saw that get any press though so there may have been a weakness in their claim (I haven't closely read the paper). In any case, this is the first interstellar comet and that's pretty cool, especially as it's been detected prior to perihelion. No, they came from different directions ('Oumuamua came from Vega, C/2019 Q4 Borisov came from Cassiopeia) and have pretty different trajectories. 'Oumuamua only had an eccentricity of 1.2, while Borisov has >3 (which wow!). Thank you. Link to comment Share on other sites More sharing options...
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