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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1872119139866495 4.7719e-08  
a 2.313903900675451 1.1238e-08 au
q 1.880713522648826 1.0889e-07 au
i 3.299877574929335 4.949e-06 deg
node 122.8945147357333 0.00010412 deg
peri 317.1208746101825 0.00010555 deg
M 47.42501554095593 1.6378e-05 deg
tp 2459031.135889607633
(2020-Jun-30.63588961)
5.8401e-05 TDB
period 1285.631202136307
3.52
9.3656e-06
2.564e-08
d
yr
n .2800180949262863 2.0399e-09 deg/d
Q 2.747094278702077 1.3341e-08 au
  Orbit Determination Parameters
   # obs. used (total)      292  
   data-arc span      10223 days (27.99 yr)  
   first obs. used      1993-04-19  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55583  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:51:02  

Additional Information
 Earth MOID = .897659 au 
 Jupiter MOID = 2.49318 au 
 T_jup = 3.557 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457517.5 (2016-May-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1860626000818764 4.7745e-08  
q 1.883716424761282 1.0886e-07 au
tp 2457743.712431881579
(2016-Dec-21.21243188)
5.9446e-05 TDB
node 122.9747349268798 0.00010426 deg
peri 316.6733044470543 0.00010573 deg
i 3.29772788027903 4.946e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      292  
   data-arc span      10223 days (27.99 yr)  
   first obs. used      1993-04-19  
   last obs. used      2021-04-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55583  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:51:02  

Additional Information
 Jupiter MOID = 2.49318 au 
 T_jup = 3.557 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.279571909518061E-15 -5.179905502638403E-15 -9.51592047514302E-13 -6.896636634929191E-14 -3.352456303608768E-13 -9.109517559820662E-16
q -5.179905502638403E-15 1.185031317975367E-14 2.15202685149193E-12 1.57172176395989E-13 7.542151272092696E-13 2.231937748547888E-15
tp -9.51592047514302E-13 2.15202685149193E-12 3.533832130291243E-9 5.247472266564799E-11 1.081919992456635E-9 -2.220976901452048E-12
node -6.896636634929191E-14 1.57172176395989E-13 5.247472266564799E-11 1.087091971740646E-8 -1.083294938671639E-8 1.64596353947971E-10
peri -3.352456303608768E-13 7.542151272092696E-13 1.081919992456635E-9 -1.083294938671639E-8 1.117798221923378E-8 -1.649965576070719E-10
i -9.109517559820662E-16 2.231937748547888E-15 -2.220976901452048E-12 1.64596353947971E-10 -1.649965576070719E-10 2.446286261118585E-11

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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