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56220 (1999 HC11)
Classification: Main-belt Asteroid          SPK-ID: 2056220
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09494235195165437 4.0028e-08  
a 2.995188815495757 1.8834e-08 au
q 2.7108185448133 1.3088e-07 au
i 9.871672404281979 5.268e-06 deg
node 29.15801667974036 2.0953e-05 deg
peri 285.7463300235534 3.5651e-05 deg
M 289.6197409108581 2.8264e-05 deg
tp 2459370.654552726612
(2021-Jun-05.15455273)
0.00014857 TDB
period 1893.366701205265
5.18
1.7858e-05
4.889e-08
d
yr
n .1901374941107995 1.7934e-09 deg/d
Q 3.279559086178214 2.0622e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1553  
   data-arc span      16864 days (46.17 yr)  
   first obs. used      1974-06-17  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56742  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:00:20  

Additional Information
 Earth MOID = 1.71924 au 
 Jupiter MOID = 2.02377 au 
 T_jup = 3.225 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6   n/a MPO474444  

56220 (1999 HC11)          Discovered 1999-Apr-17 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 HC11 = 2001 QQ76 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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