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442185 (2011 EY9)
Classification: Main-belt Asteroid          SPK-ID: 2442185
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05631203701117288 8.2759e-08  
a 2.193040942793012 5.5217e-08 au
q 2.069546340055434 1.7416e-07 au
i 7.263304895533232 1.3381e-05 deg
node 348.3232162422502 6.2298e-05 deg
peri 224.1901371287837 0.00017348 deg
M 270.4641031763077 0.00017368 deg
tp 2459295.527992251719
(2021-Mar-22.02799225)
0.00057977 TDB
period 1186.228998406751
3.25
4.48e-05
1.227e-07
d
yr
n .3034827174883799 1.1462e-08 deg/d
Q 2.31653554553059 5.8326e-08 au
  Orbit Determination Parameters
   # obs. used (total)      67  
   data-arc span      2603 days (7.13 yr)  
   first obs. used      2009-09-25  
   last obs. used      2016-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59372  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:31:06  

Additional Information
 Earth MOID = 1.07159 au 
 Jupiter MOID = 2.6583 au 
 T_jup = 3.659 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456856.5 (2014-Jul-18.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05616998495992939 8.2611e-08  
q 2.069441052953583 1.7357e-07 au
tp 2456924.075475313430
(2014-Sep-23.57547531)
0.00052508 TDB
node 348.3679716533331 6.2266e-05 deg
peri 224.3995997341146 0.00017396 deg
i 7.266280910802218 1.3384e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      67  
   data-arc span      2603 days (7.13 yr)  
   first obs. used      2009-09-25  
   last obs. used      2016-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59372  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:31:06  

Additional Information
 Jupiter MOID = 2.6583 au 
 T_jup = 3.659 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.824541902698819E-15 -1.373459563795663E-14 -1.333718733578725E-11 1.074937229286228E-13 -4.466695469420389E-12 -6.70625450611176E-15
q -1.373459563795663E-14 3.012517426028181E-14 4.499808301768891E-11 -2.796587020196547E-13 1.45074439179055E-11 1.845183046563499E-14
tp -1.333718733578725E-11 4.499808301768891E-11 2.757140939141419E-7 -1.192073251800164E-9 8.531166020851331E-8 8.256652590146242E-11
node 1.074937229286228E-13 -2.796587020196547E-13 -1.192073251800164E-9 3.877039715396046E-9 -4.212345559338201E-9 -4.290706681381491E-10
peri -4.466695469420389E-12 1.45074439179055E-11 8.531166020851331E-8 -4.212345559338201E-9 3.026252616058203E-8 4.511983499756358E-10
i -6.70625450611176E-15 1.845183046563499E-14 8.256652590146242E-11 -4.290706681381491E-10 4.511983499756358E-10 1.791254343659796E-10

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.6   n/a MPO349187  

442185 (2011 EY9)          Discovered 2009-Sep-25 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 EY9 = 2014 CD6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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