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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1400765872835923 3.462e-05  
a 46.30920303136679 0.0023626 au
q 39.82236791090995 0.00044852 au
i 9.84218746058921 0.00010624 deg
node 334.9389601880803 0.00020951 deg
peri 177.7680182329979 0.0066231 deg
M 23.50880160513824 0.0061696 deg
tp 2451483.797229797476
(1999-Nov-01.29722980)
1.5771 TDB
period 115106.37771861
315.14
8.8089
0.02412
d
yr
n .003127541732570708 2.3935e-07 deg/d
Q 52.79603815182364 0.0026936 au
  Orbit Determination Parameters
   # obs. used (total)      113  
   data-arc span      6534 days (17.89 yr)  
   first obs. used      1999-02-20  
   last obs. used      2017-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .47907  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 18:50:10  

Additional Information
 Earth MOID = 38.8331 au 
 Jupiter MOID = 34.42 au 
 T_jup = 5.933 
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Orbital Elements at Epoch 2456387.5 (2013-Apr-05.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1449845740585406 3.4491e-05  
q 39.74992949394631 0.00045989 au
tp 2451146.028505317064
(1998-Nov-28.52850532)
1.5574 TDB
node 334.8339784636715 0.00021064 deg
peri 176.3497689060635 0.0065791 deg
i 9.8087789246259 0.000106 deg
  Orbit Determination Parameters
   # obs. used (total)      113  
   data-arc span      6534 days (17.89 yr)  
   first obs. used      1999-02-20  
   last obs. used      2017-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .47907  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 18:50:10  

Additional Information
 Jupiter MOID = 34.42 au 
 T_jup = 5.933 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.18965033123113E-9 1.480954753693755E-8 3.014629420772575E-5 -3.739445133052086E-10 1.267608471891461E-7 -1.498801631736597E-10
q 1.480954753693755E-8 2.114974827438355E-7 .0005778276292698074 -5.146074315740561E-9 2.436915509780295E-6 -2.110047545160495E-9
tp 3.014629420772575E-5 .0005778276292698074 2.425342419980108 -1.298496492311997E-5 .01024062626322012 -5.596900985682254E-6
node -3.739445133052086E-10 -5.146074315740561E-9 -1.298496492311997E-5 4.43700930234501E-8 -9.833950268826104E-8 2.171677670298967E-8
peri 1.267608471891461E-7 2.436915509780295E-6 .01024062626322012 -9.833950268826104E-8 4.328453390434645E-5 -4.49496308405943E-8
i -1.498801631736597E-10 -2.110047545160495E-9 -5.596900985682254E-6 2.171677670298967E-8 -4.49496308405943E-8 1.123703784882983E-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-August); 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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