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79983 (1999 DF9)
Classification: TransNeptunian Object          SPK-ID: 2079983
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1430465041866172 3.5226e-05  
a 46.48782427179322 0.0024124 au
q 39.83790352247142 0.00044939 au
i 9.830472173676817 0.00010784 deg
node 334.9022836143409 0.00021186 deg
peri 178.4346169169926 0.0067073 deg
M 21.63430489421103 0.0060638 deg
tp 2451643.088299705808
(2000-Apr-08.58829971)
1.5969 TDB
period 115772.9922155306
316.97
9.0118
0.02467
d
yr
n .003109533519957749 2.4205e-07 deg/d
Q 53.13774502111502 0.0027575 au
  Orbit Determination Parameters
   # obs. used (total)      104  
   data-arc span      6231 days (17.06 yr)  
   first obs. used      1999-02-20  
   last obs. used      2016-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .52981  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 15:46:05  

Additional Information
 Earth MOID = 38.849 au 
 Jupiter MOID = 34.4377 au 
 T_jup = 5.942 
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Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.8   n/a MPO453222  
rotation period rot_per 6.65 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Lacerda, P.; Luu, J. (2006) Astron. J. 131, 2314-2326.]

79983 (1999 DF9)          Discovered 1999-Feb-20 by Luu, J. X., Trujillo, C. A., Jewitt, D. C. at Kitt Peak
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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