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100868 (1998 HE61)
Classification: Main-belt Asteroid          SPK-ID: 2100868
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1516108351899112 8.7289e-08  
a 2.319048138886163 1.3682e-08 au
q 1.967455313704022 2.0826e-07 au
i 11.03008187007732 8.9551e-06 deg
node 212.0647949900914 3.0742e-05 deg
peri 20.53948320426485 4.3191e-05 deg
M 75.91242051507717 3.3375e-05 deg
tp 2458728.497177102424
(2019-Sep-01.99717710)
0.00011856 TDB
period 1289.920879596756
3.53
1.1416e-05
3.126e-08
d
yr
n .2790868848580387 2.4699e-09 deg/d
Q 2.670640964068304 1.5756e-08 au
  Orbit Determination Parameters
   # obs. used (total)      391  
   data-arc span      10085 days (27.61 yr)  
   first obs. used      1992-10-21  
   last obs. used      2020-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65537  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 01:13:27  

Additional Information
 Earth MOID = .96132 au 
 Jupiter MOID = 2.32003 au 
 T_jup = 3.539 
[ 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 16.2   n/a MPO270551  

100868 (1998 HE61)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 HE61 = 1999 TE175 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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