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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .146927745058251 5.091e-08  
a 2.351030475322561 1.2636e-08 au
q 2.005598869020189 1.2076e-07 au
i 2.004169653404892 6.8126e-06 deg
node 352.8823568471357 0.00014937 deg
peri 249.7432822411988 0.00015129 deg
M 163.4012917950774 2.6556e-05 deg
tp 2458602.861179743049
(2019-Apr-29.36117974)
9.4792e-05 TDB
period 1316.696905691071
3.60
1.0615e-05
2.906e-08
d
yr
n .2734114422567532 2.2042e-09 deg/d
Q 2.696462081624933 1.4493e-08 au
  Orbit Determination Parameters
   # obs. used (total)      399  
   data-arc span      8705 days (23.83 yr)  
   first obs. used      1997-03-10  
   last obs. used      2021-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58913  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:25:34  

Additional Information
 Earth MOID = .99236 au 
 Jupiter MOID = 2.3192 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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