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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1400878069492676 1.9958e-05  
a 46.30983004629665 0.0013362 au
q 39.82238751491765 0.00024051 au
i 9.842127848413446 5.2523e-05 deg
node 334.9388534210384 0.00012842 deg
peri 177.7639495707785 0.0025924 deg
M 23.51143466254331 0.0026371 deg
tp 2451482.802657180708
(1999-Oct-31.30265718)
0.61327 TDB
period 115108.7154935099
315.15
4.9821
0.01364
d
yr
n .003127478214456295 1.3536e-07 deg/d
Q 52.79727257767563 0.0015234 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      7757 days (21.24 yr)  
   first obs. used      1999-02-20  
   last obs. used      2020-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .48241  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:21:17  

Additional Information
 Earth MOID = 38.8331 au 
 Jupiter MOID = 34.4201 au 
 T_jup = 5.933 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457399.5 (2016-Jan-12.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1489853008928052 2.0078e-05  
q 39.80002450965754 0.00023976 au
tp 2451548.819706132552
(2000-Jan-05.31970613)
0.572 TDB
node 334.8105556505012 0.00012914 deg
peri 178.0411054252126 0.0024308 deg
i 9.797224399127407 5.2296e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      7757 days (21.24 yr)  
   first obs. used      1999-02-20  
   last obs. used      2020-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .48241  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:21:17  

Additional Information
 Jupiter MOID = 34.4201 au 
 T_jup = 5.933 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.031320680981165E-10 4.427343440635802E-9 5.732435556135785E-6 6.325768235137038E-11 2.378324715608757E-8 4.025053166743035E-11
q 4.427343440635802E-9 5.748318126469729E-8 .0001076699946008891 5.946694636625063E-10 4.529837529025745E-7 4.037651566946358E-10
tp 5.732435556135785E-6 .0001076699946008891 .3271834236934436 3.132264171093286E-7 .001388349430368861 3.359004700552139E-7
node 6.325768235137038E-11 5.946694636625063E-10 3.132264171093286E-7 1.667630770565136E-8 -1.519010007048724E-8 6.586371897098428E-9
peri 2.378324715608757E-8 4.529837529025745E-7 .001388349430368861 -1.519010007048724E-8 5.908987098578288E-6 -5.115350996472776E-9
i 4.025053166743035E-11 4.037651566946358E-10 3.359004700552139E-7 6.586371897098428E-9 -5.115350996472776E-9 2.734841873505823E-9

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. 2020-October); 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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