chasd00
12 hours ago
One of my (highly educated and successful) buddies thinks it some sort of alien interstellar probe. I told my 13 year, who keeps up with these kinds of things, and asked what he thinks. He just kind of stared at me and then said "i think it's a comet from outside the solar system." and went back to playing DCS. heh from the mouth of babes..
baggy_trough
12 hours ago
Clearly your son has not studied its orbital path near 2 major planets.
ceejayoz
12 hours ago
What in said path would you like to highlight?
https://commons.wikimedia.org/wiki/File:ESA%E2%80%99s_Mars_a...
withinboredom
11 hours ago
Someone really aught to add a picture at the bottom of this article with a gif of aliens saying "take me to your leader"...
baggy_trough
12 hours ago
It goes very close to 2 major planets. What's the chance of that?
ceejayoz
12 hours ago
It was only detected when 4.5 AUs from the Sun (which, I'll also note, exerts significant graviational force on inbound objects). It was already close; we can't currently detect the tens/hundreds/thousands of similar objects likely whizzing past at further distances as we speak.
If it was 100 AUs at closest approach, we would never have seen it. (https://en.wikipedia.org/wiki/Oort_cloud is still theoretical, even)
The chances of yesterday's Powerball numbers being 04 24 49 60 65 01 was about 1:300M.
baggy_trough
12 hours ago
I don't think you understand what I'm talking about. Look at how close it goes to Mars and Jupiter.
ceejayoz
11 hours ago
> Look at how close it goes to Mars and Jupiter.
You're doing the thing. https://commons.wikimedia.org/wiki/File:Survivorship-bias.sv...
It's close because we saw it. We saw it because it's close.
baggy_trough
11 hours ago
We are not on Mars or Jupiter.
ceejayoz
11 hours ago
We are (via our robot representatives). In fact, they're our closest vantage points to this thing.
https://www.esa.int/Science_Exploration/Space_Science/ESA_s_...
This thing traveled light years to get here. Possibly over billions of years. 30 million kilometers from Mars and 300 million and 3 billion kilometers from Mars would all be close approaches. Any approach can be claimed to be close; that's the magic trick at play here.
baggy_trough
11 hours ago
Our robot representatives there were not the ones who spotted it, so what relevance is it that they are there?
I don't think you're responding to my claim, which is that the close passes to Mars and Jupiter seem very unlikely. Of all random trajectories through the solar system at the distance of this body, what fraction of them pass equally close to major planets? I'd even be willing to limit it to trajectories close to the ecliptic plane, because we may be scanning that plane more.
ceejayoz
11 hours ago
I am responding to your claim.
4.5AUs is as close as 0.2AUs from an interstellar standpoint. Both are equally likely, just as every Powerball number is equally likely. Any object of this nature we can spot is going to be quite close with our current detection technology.
Again, your argument is effectively like arguing that 04 24 49 60 65 01 cannot possibly be yesterday's winning Powerball numbers, because it's a 1:300M chance. The game must be rigged!
Now, if the next couple interstellar objects we detect also do a similarly close pass on Jupiter and Mars, there'll be something worth wondering about.
(Similarly, if tomorrow's Powerball numbers are 04 24 49 60 65 02, I'll have questions!)