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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Comet G3 ATLAS Setting over a Hill... (2025 Feb 05)

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No, it doesn't have an Earth-crossing orbit. Its orbit is extremely inclined with both nodes inside the orbit of Mercury. Additionally, its orbit is hyperbolic, so whatever is left of it (and its debris stream, which is pretty much in the same orbit) won't be back. So no meteors from this object.
Had to look up the meaning of "node". From https://en.wikipedia.org/wiki/Orbital_node. I presume the unlabeled opposite point where the orbit intersects the "plane of reference" (the ecliptic in Chris' usage?) is called the descending node, with the direction of the orbital path being from below the plane to above in this image:

Yes, the comet came from south of the ecliptic, crossed to the north at the ascending node, whipped around the Sun, and dropped back south at the descending node... both of those nodes inside the orbit of Mercury.
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Screenshot 2025-02-05 093309.png
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Statistics: Posted by johnnydeep — Wed Feb 05, 2025 4:38 pm — Replies 5 — Views 159



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