Neptune has a new Moon

General physics and astronomy discussions not directly related to Celestia
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John Van Vliet
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Neptune has a new Moon

Post #1by John Van Vliet » 15.07.2013, 20:53

--- edit----
Last edited by John Van Vliet on 18.10.2013, 11:09, edited 1 time in total.

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Chuft-Captain
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Re: Neptune has a new Moon

Post #2by Chuft-Captain » 16.07.2013, 04:50

Thanks for that news John,

As a starting point, here's a quickly thrown together *fictional* SSC for it (modified from Larissa's orbital definitions):
cc_neptune_newmoon.zip

(Extract to extras.)
- I've modified only the reported information (radius, period, semi-major-axis, and made a wild guess for Albedo). All other values remain as for Larissa (for now).

This can be updated as more accurate information becomes available.

CC
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Joe
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Re: Neptune has a new Moon

Post #3by Joe » 16.07.2013, 09:38

Chuft-Captain wrote:- I've modified only the reported information (radius, period, semi-major-axis, and made a wild guess for Albedo). All other values remain as for Larissa (for now).
This can be updated as more accurate information becomes available.
A well done by CC. And thanks to John for the news.
Joe
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kristoffer
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Re: Neptune has a new Moon

Post #4by kristoffer » 16.07.2013, 23:38

Chuft-Captain wrote:Thanks for that news John,

As a starting point, here's a quickly thrown together *fictional* SSC for it (modified from Larissa's orbital definitions):
cc_neptune_newmoon.zip

(Extract to extras.)
- I've modified only the reported information (radius, period, semi-major-axis, and made a wild guess for Albedo). All other values remain as for Larissa (for now).

This can be updated as more accurate information becomes available.

CC

Thanks for the addon, but it is supposed to be 9.656 in radius, not 19. NASA told this newly found moon is 12 miles across. That means it is measured in diameter, not radius. 12 miles is 19.312 km.

19.312/2= 9.656
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John Van Vliet
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Re: Neptune has a new Moon

Post #5by John Van Vliet » 17.07.2013, 00:51

--- edit----
Last edited by John Van Vliet on 18.10.2013, 11:09, edited 1 time in total.

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Chuft-Captain
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Re: Neptune has a new Moon

Post #6by Chuft-Captain » 18.07.2013, 13:24

kristoffer wrote: it is supposed to be 9.656 in radius, not 19. NASA told this newly found moon is 12 miles across. That means it is measured in diameter, not radius. 12 miles is 19.312 km.

19.312/2= 9.656
Well spotted (I misread it as radius).
I would suggest however that not enough is known at this stage to be able to express it's radius with four significant digits, so I would just plonk for a radius of either 9 or 10, or maybe 9.5 (whichever you prefer) at this stage. :-)
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-- Gerard K. O'Neill (1969)

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CharlottAwong
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Post #7by CharlottAwong » 29.10.2016, 13:10

It was discovered on July 15, 2013 by Hubble Telescope. It is weird knowing the fact that we are still don't know fully about our own solar system. I don't know what was the reason, why scientists were not able to discover it previously.


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