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Astronomers discover 3I/ATLAS – Third interstellar object to visit Solar System

(www.abc.net.au)
306 points gammarator | 1 comments | 03 Jul 25 03:19 UTC | HN request time: 0.458s | source

Minor Planet Electronic Circular: https://minorplanetcenter.net/mpec/K25/K25N12.html
1. martinclayton ◴[03 Jul 25 10:27 UTC] No.44453537[source]▶
In a thread elsewhere I saw "Interstellar Objects in the Solar System: 1. Isotropic Kinematics from the Gaia Early Data Release 3" (https://arxiv.org/pdf/2103.03289) mentioned.

In there, one estimate of the number of these objects is

   Nisc <~ 7.2 × 10−5 AU−3
Which (my, probably wrong, calc) implies roughly one inside the orbital volume at the radius of Saturn's orbit at any time.