Talk:Detached object

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Before this gets GA reviewed, is there really not enough content to warrant sections?

I dunno, I mean... is there a "must have sections" requirement on

Ling.Nut ^(WP:3IAR) 08:11, 15 July 2008 (UTC)[reply

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Added some. Serendi^podous 08:12, 15 July 2008 (UTC)[reply]

Looking these guys up on

Another article [1] lists as 8:3 resonant. Other detached objects are also listed as high order resonant is this article. Ruslik (talk) 07:34, 18 July 2008 (UTC)[reply]

Buie shows 2003 UY291 as classical. But again the last observation was 2005/12/02. I am not sure how to explain this unless Lykawka used an older data set for his calculations. -- Kheider (talk) 06:24, 18 July 2008 (UTC)[reply]

read here: [2].

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WGF-4MY0MMW-3&_user=501045&_coverDate=07%2F31%2F2007&_rdoc=1&_fmt=full&_orig=search&_cdi=6821&_sort=d&_docanchor=&view=c&_acct=C000022659&_version=1&_urlVersion=0&_userid=501045&md5=2b3500fe6862a3e74724d7647fb8070d#tblfn008

• Looking at the MPC's List Of Centaurs and Scattered-Disk Objects:
  perihelion
  @24AU and is under the influence of both Neptune and Uranus, so I don't think we should call it detached. When Uranus and Neptune were migrating outward, 2006 SQ372 must have had a very close fly-by of one of them.
• 2007 TG422 also comes within some influence of Neptune, but I do wonder how 2007 TG422 achieved a perihelion of 35AU with an aphelion of 900+AU. Perhaps Neptune migrated outwards to 35AU and then back inwards to 30AU. During Neptune's migration there would have been a period were Neptune had a higher eccentricity. -- Kheider (talk) 07:58, 21 January 2009 (UTC)[reply]

My initial thought is that it may be premature to combine the two. The spherical

OK. I'll take the merge notice down. Serendi^podous 22:02, 26 January 2009 (UTC)[reply]

• Emel’yanenko and Kiseleva (2008) (subscription required)

Actually that article makes the list bigger. :-) Most of the 100% resonance probability objects are simple 5:2 resonances. Some notable likely resonances are:

• (131696) 2001 XT254 7:3 (100%)
• (119878) 2002 CY224 12:5 (84%)
• (136120) 2003 LG7 3:1 (79%)
  

-- Kheider (talk) 08:56, 28 January 2009 (UTC)[reply]

In April of 2009, Marc Buie informed me that that they (the Deep Ecliptic Survey?) were "in the process of revising our classification scheme (hopefully for the better)." I have since looked at some of the objects that I have used Buie to list as ScatEXT (detached) and most are now listed as ScatNEAR. I then realized that I no longer had any idea how to properly perceive a true ScatEXT object. We need to find out how the DES or minor planet is now defining ScatNEAR/EXT objects. I honestly don't think they are using their old 2005-2006 definition. Thus, I have also lowered this article to C-class. -- Kheider (talk) 17:34, 15 August 2009 (UTC)[reply]

The DES is working on their software. Some of their links are not even currently active. I think this article might need more "peer reviewed" papers to qualify for GA level. In August I was bold and actually lowered this article from B-class to C-class. But perhaps others think it is GA level. -- Kheider (talk) 21:40, 16 September 2009 (UTC)[reply]

I don't necessarily agree... link rot's a perennial problem, but I'm prepared to accept that those references existed when they were added, and I don't think any of them are citations for controversial facts.

I do think it's a potential GA given a bit more citing the obvious, but I'll defer to your view and add a requirement for working citations to the GA review.—S Marshall ^Talk/_Cont 21:52, 16 September 2009 (UTC)[reply]

I am waiting for further clarification, but even

Cubewano. (Yes, the DES use to list Varuna as Classical.) I am fearful that the exact definition of a detached object is a moving target at this time. -- Kheider (talk) 22:16, 16 September 2009 (UTC)[reply

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Well, in GA review terms, I've asked for a clear definition of what a Detached Object is to appear in the lead. Let's see what appears? :)—S Marshall ^Talk/_Cont 23:23, 16 September 2009 (UTC)[reply]

In regards to the GA review: (1)

Marc did some further updates at the end of August to the software (still may be on-going for a few weeks) and (2) Obviously, some objects are very clearly detached. -- Kheider (talk) 23:53, 16 September 2009 (UTC)[reply

]

The Deep Ecliptic Survey references (Orbit Fit and Astrometric record) seem to up and running again and are no longer strongly in conflict with previous results. But:

• (48639) 1995 TL8 is coming up classical.
• 2006 QH181 has a good chance of being in resonance with Neptune.
• (82075) 2000 YW134 has being coming up as 8:3 resonance using DES for quite some time.
• 2003 UY291 is coming up classical.
  

Keep in mind that if I was to take the DES results as flawless I would have to accept a lot of objects as detached that are also classical, ie.: 20000 Varuna and Makemake. But then again, perhaps it is correct to say that all un-perturbed objects are detached. Where do we draw the line since the Minor Planet Center and Deep Ecliptic Survey define classical somewhat differently? The DES runs a 10 million year simulation, I do not know how exactly the MPC defines a classical object. -- Kheider (talk) 22:01, 4 October 2009 (UTC)[reply]

The last detached object in the list was discovered in 2006. Have there been any new detached objects discoveries since that time? --Jan.Kamenicek (talk) 12:38, 11 February 2012 (UTC)[reply]

Yes, probably. 2012 DR30, f.ex. is somewhat interesting:

• http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012+DR30&orb=1
• http://cosmos4u.blogspot.se/2012/02/mysterious-solar-system-object-2012.html
• http://remanzacco.blogspot.se/2012/02/trans-neptunian-object-2012-dr30.html

It seems it has a large a ~1100 AU, as can be seen in the list:

• http://www.minorplanetcenter.net/iau/lists/Centaurs.html

There are a few other candidates too, such as 2010 BK118 and 2007 TG422, but the trouble is that someone have to call them "detached objects" before the Wikipedia editors – we cannot just assume "they are detached objects" because of any criterion. Rursus dixit. (^mbork³!) 17:22, 14 November 2012 (UTC)[reply]

2008 ST291 (q=42.6 AU, a=157 AU), but no objects with q>40 AU more recently discovered than those. --JorisvS (talk) 20:02, 14 November 2012 (UTC)[reply

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Since the DES/Buie 10 million year simulation was used as a source in this article and moved to a new server in 2009 with different software libraries (gremlins), I have often wondered if the 2009 version of this list was better. -- Kheider (talk) 14:40, 9 February 2016 (UTC)[reply]

Can someone expand the table to add the semimajor axis length to the table? -- 70.24.250.235 (talk) 09:00, 29 March 2014 (UTC)[reply]

 Done; semi-major axis added. --JorisvS (talk) 11:58, 29 March 2014 (UTC)[reply]