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22272 (1981 EY39)
Classification: Main-belt Asteroid          SPK-ID: 2022272
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09566301925093669 5.4009e-08  
a 2.236510839165783 6.7516e-09 au
q 2.022559459703738 1.2138e-07 au
i .9745720393370125 5.1007e-06 deg
node 189.9544799034772 0.00021319 deg
peri 346.2425929677858 0.00021399 deg
M 319.52730757637 1.8823e-05 deg
tp 2459337.845531273411
(2021-May-03.34553127)
6.4074e-05 TDB
period 1221.672893438631
3.34
5.532e-06
1.515e-08
d
yr
n .2946778977691086 1.3344e-09 deg/d
Q 2.450462218627828 7.3975e-09 au
  Orbit Determination Parameters
   # obs. used (total)      707  
   data-arc span      18254 days (49.98 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56061  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:03:04  

Additional Information
 Earth MOID = 1.02615 au 
 Jupiter MOID = 2.50965 au 
 T_jup = 3.632 
[ 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 16.4   n/a MPO435908  

22272 (1981 EY39)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1981 EY39 = 1216 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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