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227891 (2007 ET69)
Classification: Main-belt Asteroid          SPK-ID: 2227891
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1872539738248633 4.7501e-08  
a 2.3135763139427 1.1121e-08 au
q 1.88034995540985 1.0821e-07 au
i 3.299904820288092 4.854e-06 deg
node 122.894799998967 0.00010392 deg
peri 317.074296068794 0.00010535 deg
M 102.3552641186946 1.6408e-05 deg
tp 2459031.046728936700
(2020-Jun-30.54672894)
5.8358e-05 TDB
period 1285.358195453661
3.52
9.2677e-06
2.537e-08
d
yr
n .2800775700293721 2.0194e-09 deg/d
Q 2.74680267247555 1.3203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      300  
   data-arc span      10246 days (28.05 yr)  
   first obs. used      1993-04-19  
   last obs. used      2021-05-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55144  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 03:50:50  

Additional Information
 Earth MOID = .897597 au 
 Jupiter MOID = 2.49416 au 
 T_jup = 3.557 
[ 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 17.14   n/a MPCxxxxx  

227891 (2007 ET69)          Discovered 2007-Mar-10 by Spacewatch at Kitt Peak
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

Alternate Designations
 2007 ET69 = 1993 HL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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