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A dwarf planet coming within 11 AU of the sun over the next 10 years

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Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#31
post #2

> could possibly reach magnitude 13 in early 2031 Don't get too excited about looking at this one; that's a bit brighter than Pluto, so you'd need a pretty decent telescope to spot it. https://en.wikipedia.org/wiki/Magnitude_(astronomy)#Examples

I believe this is absolute magnitude, and specifically, absolute magnitude as defined for comets [1]. At Saturn's distance, definitely not a naked-eye object in any case.

[1] https://en.wikipedia.org/wiki/Absolute_magnitude#Cometary_ma...

Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#32
post #7

Earlier quoted context omitted.

No, no need to worry. Coronal mass ejections causing geomagnetic storms are really something to worry about but this thing is just a piece of rock flying around the Sun at very far distances (from our point of view). It is coming no closer than eleven astronomical units to Sun (1 AU is the mean distance of Earth to Sun).

Yeah I totally misunderstood the distances - my bad.

There is a website that visualizes the distances in the solar system at the scale of 1 pixel to the diameter of Moon. In the lower right corner there is a symbol with a "C" and some lines around it that makes you automatically travel at the speed of light. Start the journey, put it on an extra screen if you have one and see nothing happen for most of the time ;)

The current distance from Sun is shown in the bottom center and you can change units in the menu attached to it. "Astronomical units" or "light minutes" might be the most useful, kilometers or miles if you just want to be blown away by the order of magnitude.

https://joshworth.com/dev/pixelspace/pixelspace_solarsystem....

I also submitted it for discussion here:

https://news.ycombinator.com/item?id=27573172

Edit: fixed the scale, it's 1px:diameter of Moon, not 1px:distance Earth-Moon as I initially wrote.

Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#33
post #14

Earlier quoted context omitted.

New Horizons took a nearly straight shot to Pluto (just stopping by Jupiter on the way for a gravity assist). That trip took 9 years to travel 40 AU (not at constant speed, of courses, since it's constantly being drawn toward the Sun). This dwarf planet makes its closest approach at 10 AU, so you could do a fly by in less than 3 years if you wanted to pay for it. However, the science return from a flyby would be limi…

Getting into orbit would be rather difficult, as the probe would have have to match the planets velocity at perihelion. My instinct says it’s probably just on the edge of doable (although I’m not sure on which side), but I haven’t crunched the numbers. It would almost certainly need to be launched on a Delta-IV or Falcon Heavy class vehicle. EDIT: s/perigee/perihelion. I could say periapse and be neutral, but perihel…

It's difficult to believe that ten years from now, there'd be any serious options other than Starship and its future peers. (Incidentally, the Delta IV is already at end-of-life; ULA is replacing it with Vulcan and its Blue Origin engines. The final Delta IV-H launches are planned for 2023).

https://spacenews.com/ulas-delta-4-heavy-down-to-final-five-...

Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#34
post #14

Earlier quoted context omitted.

New Horizons took a nearly straight shot to Pluto (just stopping by Jupiter on the way for a gravity assist). That trip took 9 years to travel 40 AU (not at constant speed, of courses, since it's constantly being drawn toward the Sun). This dwarf planet makes its closest approach at 10 AU, so you could do a fly by in less than 3 years if you wanted to pay for it. However, the science return from a flyby would be limi…

Getting into orbit would be rather difficult, as the probe would have have to match the planets velocity at perihelion. My instinct says it’s probably just on the edge of doable (although I’m not sure on which side), but I haven’t crunched the numbers. It would almost certainly need to be launched on a Delta-IV or Falcon Heavy class vehicle. EDIT: s/perigee/perihelion. I could say periapse and be neutral, but perihel…

Might there be not some benefits to try to get into orbit around this object, like perhaps a free ride to the Oort Cloud maybe?

Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#35
The post says "Incl. 95.46628 +/- 0.000052".

Am I right to interpret this as meaning that the body has an extreme inclination, almost in polar orbit of the Sun? That would be pretty interesting; it would mean an orbit completely out of line with the rest of the Solar System.

Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#36
post #23

Is this something we could plan and manage to launch an orbiter/lander to in time? Has anyone thought about the possibility of slapping something like a telescope on that and letting it beam back data and images from veryyyyy far out eventually?

Just launch a deep-space telescope; it would be easier. Soft-landing the telescope on an airless body would be harder (in delta-V terms) than just launching it into an equivalent solar orbit. And the body would block about half your view of the sky at any one time.

Could you get a nice gravity boost away from the sun by just following it for as long as possible?

Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#37
post #23

Is this something we could plan and manage to launch an orbiter/lander to in time? Has anyone thought about the possibility of slapping something like a telescope on that and letting it beam back data and images from veryyyyy far out eventually?

If you launch your telescope on a spacecraft and get it to match speed with the dwarf planet (which is necessary for a soft landing), there's not much point in actually attaching it to the dwarf planet. That just blocks the view of half the sky. Also, there will be nothing to see out there other than the dwarf planet itself.

and frozen aliens

Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#38
post #23

Is this something we could plan and manage to launch an orbiter/lander to in time? Has anyone thought about the possibility of slapping something like a telescope on that and letting it beam back data and images from veryyyyy far out eventually?

If you launch your telescope on a spacecraft and get it to match speed with the dwarf planet (which is necessary for a soft landing), there's not much point in actually attaching it to the dwarf planet. That just blocks the view of half the sky. Also, there will be nothing to see out there other than the dwarf planet itself.

Is that really true? If we manage to get a spacecraft get captured by the dwarf planet's gravity and orbit it, would that not be a lot less delta-V compared to if we made the spacecraft achieve the dwarf planet's orbit around the sun just by itself?

Re: A dwarf planet coming within 11 AU of the sun over the next 10 years

#40
post #14

Earlier quoted context omitted.

Getting into orbit would be rather difficult, as the probe would have have to match the planets velocity at perihelion. My instinct says it’s probably just on the edge of doable (although I’m not sure on which side), but I haven’t crunched the numbers. It would almost certainly need to be launched on a Delta-IV or Falcon Heavy class vehicle. EDIT: s/perigee/perihelion. I could say periapse and be neutral, but perihel…

Might there be not some benefits to try to get into orbit around this object, like perhaps a free ride to the Oort Cloud maybe?

There's no such thing as a free ride. If you can soft land on it you're already going to the Oort cloud.

You could get a free ride by having it crash into you, but that's going to be like catching a bus by letting it hit you, at ten thousand miles an hour.

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