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298452012 VP113 has Q=460 +/- 30

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  • Bill Gray
    Mar 28, 2014
    • 0 Attachment
      Hello all,

      Lucian Hudin has measured one (568) CFHT image from 2011 October
      22 and kindly copied the astrometry to me, and it _lowers_ the nominal
      perihelion distance a bit and excludes high-Q orbits. Gareth has
      pointed out that the DOU MPEC 2014-F58 gives a new orbit with two
      more observations (but those observations are unpublished as yet).

      You should probably treat the MPES orbit as 'definitive', since
      it includes both 2011 observations, but Lucian's single observation
      gets us the following solution. This solution pretty much overlaps
      the MPC one, but shows the uncertainties, all of which drop a
      _lot_ with the new data point.

      -- Bill

      Orbital elements: 2012 VP113
      Perihelion 1978 Jan 19.757598 +/- 1327 TT = 18:10:56 (JD 2443528.257598)
      Epoch 2013 Oct 30.0 TT = JDT 2456595.5 Find_Orb
      M 2.89257 +/- 0.09
      n 0.00022136 +/- 1.55e-5 Peri. 293.05135 +/- 2.7
      a 270.646163 +/- 12.6 Node 90.89627 +/- 0.017
      e 0.7032096 +/- 0.0162 Incl. 24.01270 +/- 0.007
      P4452.49 H 4.0 G 0.15 U 6.3
      q 80.3251609 +/- 0.777 Q 460.967165 +/- 31.2
      From 25 observations 2011 Oct. 22-2013 Oct. 30; mean residual 0".235.