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JPL Small-Body Database Browser
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39885 (1998 EG12)
Classification: Main-belt Asteroid          SPK-ID: 2039885
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .127711261240324 3.667e-08  
a 2.265160477659731 8.6828e-09 au
q 1.975873976146072 8.4128e-08 au
i 6.703988460007222 3.7078e-06 deg
node 102.6245382555911 3.3422e-05 deg
peri 266.1587591852856 3.81e-05 deg
M 342.4445661688832 2.2422e-05 deg
tp 2459061.223382546312
(2020-Jul-30.72338255)
7.7767e-05 TDB
period 1245.222301366601
3.41
7.1598e-06
1.96e-08
d
yr
n .2891050052708732 1.6623e-09 deg/d
Q 2.554446979173389 9.7917e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1406  
   data-arc span      7824 days (21.42 yr)  
   first obs. used      1998-02-26  
   last obs. used      2019-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52394  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:38:01  

Additional Information
 Earth MOID = .988362 au 
 Jupiter MOID = 2.92112 au 
 T_jup = 3.597 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456857.5 (2014-Jul-19.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1278065659479691 3.6647e-08  
q 1.976323832798237 8.4041e-08 au
tp 2456570.748633125933
(2013-Oct-05.24863313)
7.0345e-05 TDB
node 102.6691088309483 3.3412e-05 deg
peri 266.2923381446651 3.8097e-05 deg
i 6.704414281439959 3.7084e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1406  
   data-arc span      7824 days (21.42 yr)  
   first obs. used      1998-02-26  
   last obs. used      2019-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52394  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:38:01  

Additional Information
 Jupiter MOID = 2.92112 au 
 T_jup = 3.597 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.34297623090028E-15 -3.067771505911972E-15 2.380794496970407E-13 7.040441561746773E-15 4.372704156908957E-14 1.319299207409996E-15
q -3.067771505911972E-15 7.062873170241192E-15 -3.056365121116531E-13 -1.485155111567083E-14 -3.638033615221653E-14 -2.817558995879138E-15
tp 2.380794496970407E-13 -3.056365121116531E-13 4.948381990459751E-9 9.068412195833545E-12 1.302880321898756E-9 1.927423656626051E-12
node 7.040441561746773E-15 -1.485155111567083E-14 9.068412195833545E-12 1.116329027724132E-9 -1.106013628436918E-9 -8.19998887394279E-12
peri 4.372704156908957E-14 -3.638033615221653E-14 1.302880321898756E-9 -1.106013628436918E-9 1.451357930557462E-9 8.64232241444183E-12
i 1.319299207409996E-15 -2.817558995879138E-15 1.927423656626051E-12 -8.19998887394279E-12 8.64232241444183E-12 1.375242376580413E-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 14.7   n/a MPO337581  

39885 (1998 EG12)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 EG12 = 1999 NZ18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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