Talk:2007 WD5

message: i think SI units should have priority than the imperial ones 
(Nabukhadnezar (talk) 17:48, 21 December 2007 (UTC)
thread_title:  feet VS metres 

message: 1. Go to http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2007WD5
2. Make sure "Ephemeris Type" is set to Observer.
3. Click "Observer Location" and change to @mars (Mars (body center) [500@499]).
4. Click "Time Span" and set to 2008-01-29 to 2008-01-31 STEP 1 minute.
5. (if you want) Table Settings: remove 1,9,23,24. Make sure 20 (Obsrv range & rng rate) is checked.
6. Generate away.
Delta is the distance (in AU) from Mars.  Deldot is the change in direction in KM/Sec.  The closest distance is currently "2008-Jan-30 09:10" at .0003AU.  But do keep in mind that the orbit of this object is not yet well determined.
-- Kheider (talk) 17:59, 21 December 2007 (UTC)
replies: text: Let's wait for an announcement by NASA or other WP:RS and update this article, then. Thanks for keeping an eye on this. Awolf002 (talk) 21:38, 1 January 2008 (UTC)
thread_title: Horizons

message: Could someone create a simple diagram comparing both the size of 2007 WDF and the expected crater on Mars with known earth objects?  An illustration of the orbit would help, too. Also, more content  about Mars-crosser  asteroids would be great. —Viriditas | Talk 03:29, 22 December 2007 (UTC)
thread_title:  Diagram requested 

message: What date will it be visible again (move out from behind the moon)?
And, if it does hit mars, will that part of mars be facing the earth, and the impact thus be visible from earth? Ariel. (talk) 08:28, 27 December 2007 (UTC)
replies: text: Since this asteroid is so faint (400,000x fainter than naked eye visibility) the Full Moon has been near the same part of the sky as the asteroid drowning out its dim light.  They should be able to reacquire it in the next few days.  The updated orbital elements came from Precovery images from the Apache Point-Sloan Digital Sky Survey dating back to 2007-11-08.  The impact flash would be brief and might only be visible to large telescopes.  The event would really only be observable with the Hubble and probes in orbit around (or on) Mars.   -- Kheider (talk) 15:06, 27 December 2007 (UTC)
replies: text: Thanks for the answer. I was actually thinking of hubble when I asked, I know the probes in orbit can photo the crater, but I was wondering if it would be possible to watch it live, as it impacted. Hmm, can they move the probes in orbit if they wanted to? To watch it live if they happened to be on the wrong side? Probably not, I guess, so I really hope hubble can watch it. Ariel. (talk) 20:51, 27 December 2007 (UTC)

text: I think the question should be is if the impact will be on the night or day side.  While I realize Mars rotates, it would be a shame for it to happen at night, but I can only imagine geologists on earth will be going insane watching the impacts for study. --Hourick (talk) 21:55, 27 December 2007 (UTC)
thread_title:  two questions 

message: A photo of the asteroid would be nice (even if its a point of light)
A diagram of the orbit would be nice
70.55.86.184 (talk) 08:04, 29 December 2007 (UTC)
thread_title: reqimage

message: Perhaps the tool isn't the most accurate (especially considering how little we know about what's going to happen only a month from now), but is there anything to be said about the proximity of Earth and the asteroid on 12 October 2084?  See this tool at JPL. --Bossi (talk • gallery • contrib) 23:23, 29 December 2007 (UTC)
replies: text: Until the orbit is better refined with an observation arc of more than 41 days, it probably is not reliable to run predictions beyond the most recent encounters.  Any error margin will be greatly amplified by a close approach to a planet.  The Orbital Simulation applet is driven by two-body motion approximation (i.e., no perturbing planets are included) and can not really be used for long term orbit extrapolations.  Horizons ephemeris handles planetary perturbations and osculating orbital elements. -- Kheider (talk) 01:54, 1 January 2008 (UTC)
replies: text: 10-4, just wanted to make sure we weren't potentially missing anything interesting.  Thanks! --Bossi (talk • gallery • contrib) 03:39, 2 January 2008 (UTC)

text: Huh? The tool shows the asteroid at 1.884 AU from Earth on October 12, 2084, which isn't close at all! ~AH1(TCU) 23:01, 2 January 2009 (UTC)
replies: text: The orbit of 2007 WD5 was refined greatly from 2007-12-29 to 2008-01-09 (last observation), but the orbit quality was still only considered a 5 (well known objects are a 0 or 1).JPL  Due to how close it passed to Mars with a only decently known trajectory, 2007 WD5 is now considered (lost) because of the perturbation of Mars.  The NEO program will recover it when it does make another fairly close pass to the Earth. -- Kheider (talk) 23:39, 2 January 2009 (UTC)
thread_title: 2084

message: Shouldn't it be noted that it could become a moon of Mars if it goes really close to Mars but doesn't hit. (I don't know.) User:Coby2  —Preceding unsigned comment added by 75.164.224.204 (talk) 23:49, 31 December 2007 (UTC)
replies: text: It will not become a new moon because it is coming in at 13km/sec which is almost 3x faster than Mars escape velocity of 5km/sec. -- Kheider (talk) 01:54, 1 January 2008 (UTC)
replies: text: What if the asteroid lost its velocity while close to Mars? Say, Mars' atmosphere slowed down the asteroid, but the asteroid didn't impact the planet itself. It just flew across the planetary sky then orbited around Mars? I know this is extremely unlikely. But there is a chance it could happen. But there's also a chance that the asteroid can slingshot away from our solar system. 70.157.116.27 (talk) 06:57, 1 January 2008 (UTC)
thread_title: Moon

message: If someone will contact me by email at ebeshore@lpl.arizona.edu, I can supply you with JPEGs of the discovery images.
Ed Beshore, Catalina Sky Survey
70.56.224.130 (talk) 20:49, 2 January 2008 (UTC)
replies: text: It may be more appropriate if you directly upload them, which may help in determining the accuracy of the license (although if someone familiar with licensing wishes to have a go at it, by all means do so). Cheers! --Bossi (talk • gallery • contrib) 02:41, 3 January 2008 (UTC)
thread_title:  Image of WD5 

message: :: I'm sure we have at least some clues of what would happen if (although far from likely) indeed this asteroid impacts upon Mars, but a section dedicated to the likely outcome would be nice. I imagine that the surface of Mars will not be visible from Earth within a week after impact from all of the dust that would be kicked up into it's atmosphere. Since the impact crater would be about the same as the one in Arizona, could this asteroid be considered an end to life if indeed life exists or existed on or under Mars surface? Could this impact "jumpstart" or "excite" the core of Mars? Would this impact have any effect on the orbit of Mars? I know the chances of this impact are slim to none, but I just figured ideas on the outcome would be interesting. -Rayne 13:02, February 2008 (UTC)
:: All three questions have answer: NO. --84.10.228.217 (talk) 17:55, 12 June 2008 (UTC)
replies: text:  Thank you for the information Kheider! :) -Rayne 11:30, 18 February 2008 (UTC)
thread_title:  Aftermath 

message: During several automated bot runs the following external link was found to be unavailable. Please check if the link is in fact down and fix or remove it in that case!
* http://www.livescience.com/blogs/2008/01/03/possible-asteroid-strike-on-mars-scientific-paydirt/
** In 2007 WD5 on 2011-05-26 03:07:24, 404 Not Found
** In 2007 WD5 on 2011-05-27 15:23:52, 404 Not Found
** In 2007 WD5 on 2011-06-15 19:56:52, 404 Not Found
--JeffGBot (talk) 19:57, 15 June 2011 (UTC)
thread_title:  Dead link 

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thread_title:  External links modified 

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thread_title:  External links modified (January 2018)