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100544 (1997 ET28)
Classification: Main-belt Asteroid          SPK-ID: 2100544
[ 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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1470769968909591 5.2539e-08  
a 2.350797718130723 1.4617e-08 au
q 2.005049449449937 1.2612e-07 au
i 2.004219564447992 8.203e-06 deg
node 352.8835778477717 0.00015699 deg
peri 249.7400908016763 0.00015967 deg
M 108.705688512787 2.9593e-05 deg
tp 2458602.968920607094
(2019-Apr-29.46892061)		 0.00010699 TDB
period 1316.501376693015
3.60		 1.2279e-05
3.362e-08		 d
yr
n .2734520497838763 2.5505e-09 deg/d
Q 2.696545986811509 1.6767e-08 au
   Orbit Determination Parameters
   # obs. used (total)      332  
   data-arc span      7623 days (20.87 yr)  
   first obs. used      1997-03-10  
   last obs. used      2018-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .618  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Feb-05 23:11:48  

Additional Information
 Earth MOID = .993271 au 
 Jupiter MOID = 2.32025 au 
 T_jup = 3.542 
[ 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 16.7   n/a MPO432533  

100544 (1997 ET28)          Discovered 1997-Mar-10 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1997 ET28 = 1998 TW3 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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