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Pluto's 4th moon
Juramike
post Jul 20 2011, 01:55 PM
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New moon discovered around Pluto using Hubble images!
http://www.nasa.gov/mission_pages/hubble/s...pluto-moon.html


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Explorer1
post Jul 20 2011, 04:31 PM
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It's gonna be tricky to plan a close-flyby of all four of them, that's for sure. I don't envy the NH team, even with the years still left to plan.
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kap
post Jul 20 2011, 04:32 PM
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QUOTE (Explorer1 @ Jul 20 2011, 09:31 AM) *
It's gonna be tricky to plan a close-flyby of all four of them, that's for sure. I don't envy the NH team, even with the years still left to plan.


How close would a flyby need to be to get decent science data and images on something 35km across? I'm not that familiar with the instruments on New Horizons.

-kap
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ugordan
post Jul 20 2011, 04:36 PM
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In all likelihood, if they already have a good orbit fit for P4, the NH team already knows the closest approach distance and time. The actual trajectory through the Pluto system is fixed based on other requirements, neither Nix nor Hydra and certainly not P4 will have changed that. Only some observations times and targets might change a bit.


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Alan Stern
post Jul 20 2011, 04:42 PM
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We'll likely get a fair imagery with LORRI, and crudely resolved colors with MVIC; unlikely to do more than the very crudest compositional resolution with LEISA...more once we have a good orbit fit that goes out to 2015.5.

-Alan
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ugordan
post Jul 20 2011, 04:48 PM
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Back of the envelope calculation - let's say P4 is 20 km and closest approach by NH is 50 000 km. The moon would then be about 80 pixels across in LORRI images. Not bad at all.

That's about this big, although the uncertainty is obviously +/- 50% of this:
Attached Image


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Posts in this topic
- Juramike   Pluto's 4th moon   Jul 20 2011, 01:55 PM
- - ugordan   Awesome, another target for NH   Jul 20 2011, 02:13 PM
|- - MahFL   I just saw that, cool. Who would have thought it w...   Jul 20 2011, 02:23 PM
- - kap   In the search for a possible ring around Pluto in ...   Jul 20 2011, 04:25 PM
- - Explorer1   It's gonna be tricky to plan a close-flyby of ...   Jul 20 2011, 04:31 PM
|- - kap   QUOTE (Explorer1 @ Jul 20 2011, 09:31 AM)...   Jul 20 2011, 04:32 PM
|- - ugordan   In all likelihood, if they already have a good orb...   Jul 20 2011, 04:36 PM
|- - Alan Stern   We'll likely get a fair imagery with LORRI, an...   Jul 20 2011, 04:42 PM
|- - ugordan   Back of the envelope calculation - let's say P...   Jul 20 2011, 04:48 PM
- - Seryddwr   Ah, Hubble - casting off veils of mankind's ig...   Jul 20 2011, 08:29 PM
- - jasedm   Really pleasing news! This no doubt presents a...   Jul 20 2011, 08:56 PM
- - ElkGroveDan   The "Kodak Moment" team here should prob...   Jul 20 2011, 09:14 PM
- - Explorer1   What would be the procedure if rings were discover...   Jul 20 2011, 09:29 PM
- - machi   Fantastic news! New Horizons flyby of Pluto mo...   Jul 20 2011, 09:46 PM
|- - Alan Stern   QUOTE (machi @ Jul 20 2011, 10:46 PM) Fan...   Jul 20 2011, 10:23 PM
- - jekbradbury   I see two possibilities. Perhaps Pluto will conti...   Jul 20 2011, 10:59 PM
|- - ElkGroveDan   QUOTE (jekbradbury @ Jul 20 2011, 03:59 P...   Jul 20 2011, 11:37 PM
|- - djellison   QUOTE (jekbradbury @ Jul 20 2011, 03:59 P...   Jul 20 2011, 11:44 PM
- - nprev   The NH encounter just keeps getting more & mor...   Jul 21 2011, 12:18 AM
- - Drkskywxlt   What's the general consensus (or is there any?...   Jul 21 2011, 12:20 PM
|- - tfisher   QUOTE (Drkskywxlt @ Jul 21 2011, 07:20 AM...   Jul 21 2011, 01:48 PM
|- - Drkskywxlt   QUOTE (tfisher @ Jul 21 2011, 08:48 AM) T...   Jul 21 2011, 04:24 PM
- - IM4   Pluto's P4 moon is now available at SSD Horizo...   Jul 23 2011, 08:21 AM
- - Explorer1   So that means P4 will appear just a little smaller...   Jul 23 2011, 05:27 PM
|- - ugordan   It would appear just a little smaller if NH were t...   Jul 23 2011, 05:34 PM
- - elakdawalla   Also, the orbit used to make that calculation may ...   Jul 24 2011, 02:36 AM
|- - IM4   QUOTE (elakdawalla @ Jul 24 2011, 02:36 A...   Jul 24 2011, 08:45 AM
- - tasp   LOL, when the accurate orbit becomes available, I ...   Jul 24 2011, 04:41 AM
- - CAP-Team   Am I right that the orbit of Pluto's fourth mo...   Jul 25 2011, 09:34 PM
|- - Alan Stern   More on P4 (and NH too) in this radio interview ai...   Aug 16 2011, 09:15 PM
- - ups   2015 is going to be a really exciting year with th...   Sep 6 2012, 09:34 PM


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