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312539 (2009 ES20)
Classification: Main-belt Asteroid          SPK-ID: 2312539
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1257018729695668 4.4397e-08  
a 2.289392072667469 1.3824e-08 au
q 2.00161120117149 1.0197e-07 au
i 3.18949480500691 6.1248e-06 deg
node 2.378829093634413 8.7112e-05 deg
peri 111.3583189553932 9.0587e-05 deg
M 195.7835660635562 2.4422e-05 deg
tp 2459777.655455375795
(2022-Jul-17.15545538)
8.7368e-05 TDB
period 1265.25682573098
3.46
1.146e-05
3.138e-08
d
yr
n .2845272143005562 2.5771e-09 deg/d
Q 2.577172944163448 1.5562e-08 au
  Orbit Determination Parameters
   # obs. used (total)      170  
   data-arc span      8745 days (23.94 yr)  
   first obs. used      1995-01-29  
   last obs. used      2019-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51043  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:30:20  

Additional Information
 Earth MOID = 1.02054 au 
 Jupiter MOID = 2.50411 au 
 T_jup = 3.587 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457226.5 (2015-Jul-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1263869185347211 4.4507e-08  
q 1.998692819371327 1.0237e-07 au
tp 2457248.488006755038
(2015-Aug-13.98800675)
8.1886e-05 TDB
node 2.46048850307501 8.7149e-05 deg
peri 111.2388497321869 9.0557e-05 deg
i 3.190057942594623 6.1235e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      170  
   data-arc span      8745 days (23.94 yr)  
   first obs. used      1995-01-29  
   last obs. used      2019-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51043  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:30:20  

Additional Information
 Jupiter MOID = 2.50411 au 
 T_jup = 3.587 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.9808886804142E-15 -4.525015493490433E-15 4.205115773639014E-13 9.526394962061829E-15 8.394906100681148E-14 -4.043896045937381E-15
q -4.525015493490433E-15 1.04803417035604E-14 -9.025323123531661E-13 -2.13972260112774E-14 -1.758388835837723E-13 9.46422679535151E-15
tp 4.205115773639014E-13 -9.025323123531661E-13 6.70531625264867E-9 1.771765801851696E-11 2.02919619351644E-9 1.266542365724207E-12
node 9.526394962061829E-15 -2.13972260112774E-14 1.771765801851696E-11 7.594987725166456E-9 -7.577669242185922E-9 -2.489830386602242E-11
peri 8.394906100681148E-14 -1.758388835837723E-13 2.02919619351644E-9 -7.577669242185922E-9 8.200588930377831E-9 2.539668601841371E-11
i -4.043896045937381E-15 9.46422679535151E-15 1.266542365724207E-12 -2.489830386602242E-11 2.539668601841371E-11 3.749765288729483E-11

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 17.8   n/a MPO418615  

312539 (2009 ES20)          Discovered 2009-Mar-15 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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