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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1388587598938737 1.9915e-05  
a 46.22526545817008 0.0013312 au
q 39.80648242088347 0.00024202 au
i 9.845905695964415 5.2561e-05 deg
node 334.9512099762488 0.00012841 deg
peri 177.2769790737481 0.0026462 deg
M 24.56832335695124 0.0027282 deg
tp 2451366.373745263058
(1999-Jul-06.87374526)
0.62593 TDB
period 114793.5661188431
314.29
4.9586
0.01358
d
yr
n .003136064260145908 1.3546e-07 deg/d
Q 52.64404849545669 0.001516 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .48241  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:44:42  

Additional Information
 Earth MOID = 38.8172 au 
 Jupiter MOID = 34.4047 au 
 T_jup = 5.929 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.11   n/a E2021B10  
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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