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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 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 
[ 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 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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