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

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456360.5 (2013-Mar-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1448003412630835 3.4929e-05  
q 39.74948582890897 0.00046644 au
tp 2451138.242352282778
(1998-Nov-20.74235228)
1.6265 TDB
node 334.8356961055004 0.00021282 deg
peri 176.3171321139987 0.0068697 deg
i 9.809714896561136 0.00010779 deg
  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
 Jupiter MOID = 34.4377 au 
 T_jup = 5.942 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.220059813123345E-9 1.514877387987459E-8 3.055986391453849E-5 -3.785689010710681E-10 1.284834057725624E-7 -1.51585836993471E-10
q 1.514877387987459E-8 2.17567989234657E-7 .0006045340433376471 -5.245964988909118E-9 2.549255589057375E-6 -2.157353559048063E-9
tp 3.055986391453849E-5 .0006045340433376471 2.645376827241225 -1.350009013375999E-5 .01116778579888359 -5.883038549150433E-6
node -3.785689010710681E-10 -5.245964988909118E-9 -1.350009013375999E-5 4.529293911337553E-8 -1.014155226368807E-7 2.230903689497547E-8
peri 1.284834057725624E-7 2.549255589057375E-6 .01116778579888359 -1.014155226368807E-7 4.719221297580073E-5 -4.673780147320873E-8
i -1.51585836993471E-10 -2.157353559048063E-9 -5.883038549150433E-6 2.230903689497547E-8 -4.673780147320873E-8 1.161835177406273E-8

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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