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JPL Small-Body Database Browser
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49946 (1999 XD204)
Classification: Main-belt Asteroid          SPK-ID: 2049946
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05108960997369223 4.8549e-08  
a 2.365630846840334 1.2002e-08 au
q 2.244771689533526 1.1091e-07 au
i 7.334573812284217 4.9399e-06 deg
node 47.85132187927636 3.5115e-05 deg
peri 116.9311312652116 5.7895e-05 deg
M 56.17698200365624 4.5743e-05 deg
tp 2458393.116217269276
(2018-Oct-01.61621727)
0.00016865 TDB
period 1328.981357136657
3.64
1.0114e-05
2.769e-08
d
yr
n .2708841610657611 2.0614e-09 deg/d
Q 2.486490004147142 1.2615e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1006  
   data-arc span      10100 days (27.65 yr)  
   first obs. used      1991-09-12  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53887  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:41:44  

Additional Information
 Earth MOID = 1.26068 au 
 Jupiter MOID = 2.48963 au 
 T_jup = 3.535 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9   n/a MPO436133  

49946 (1999 XD204)          Discovered 1999-Dec-12 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XD204 = 1991 RC8 = 1998 SU76 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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