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120782 (1998 EM12)
Classification: Main-belt Asteroid          SPK-ID: 2120782
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08252717199800437 4.0705e-08  
a 2.668963215765185 1.5813e-08 au
q 2.448701229401385 1.0327e-07 au
i 21.85378929299549 7.032e-06 deg
node 3.466124251843 1.0392e-05 deg
peri 103.7378215367705 4.3992e-05 deg
M 132.5736705705497 4.1689e-05 deg
tp 2458614.001252079930
(2019-May-10.50125208)
0.00018426 TDB
period 1592.620528213151
4.36
1.4154e-05
3.875e-08
d
yr
n .226042546622141 2.0088e-09 deg/d
Q 2.889225202128986 1.7118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      762  
   data-arc span      8137 days (22.28 yr)  
   first obs. used      1998-03-01  
   last obs. used      2020-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53543  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:07  

Additional Information
 Earth MOID = 1.54419 au 
 Jupiter MOID = 2.22809 au 
 T_jup = 3.274 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457578.5 (2016-Jul-09.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08329433416606538 4.0718e-08  
q 2.446665030670111 1.0345e-07 au
tp 2457023.228923619729
(2014-Dec-31.72892362)
0.00018274 TDB
node 3.480040257391809 1.0391e-05 deg
peri 104.2189389402709 4.3557e-05 deg
i 21.85508842307443 7.0322e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      762  
   data-arc span      8137 days (22.28 yr)  
   first obs. used      1998-03-01  
   last obs. used      2020-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53543  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:07  

Additional Information
 Jupiter MOID = 2.22809 au 
 T_jup = 3.274 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.65795364551164E-15 -4.177776014102293E-15 4.522261326803437E-13 -2.383567550357167E-15 5.857741527206363E-14 -8.163325377904687E-15
q -4.177776014102293E-15 1.070090705097746E-14 -1.416060731381578E-12 5.586618080672306E-15 -1.988314701856717E-13 2.1980266976715E-14
tp 4.522261326803437E-13 -1.416060731381578E-12 3.339340423875256E-8 8.00230819864989E-12 7.734484529514826E-9 -1.027043086846287E-11
node -2.383567550357167E-15 5.586618080672306E-15 8.00230819864989E-12 1.079793858199021E-10 -9.766913176203854E-11 8.273454760650206E-12
peri 5.857741527206363E-14 -1.988314701856717E-13 7.734484529514826E-9 -9.766913176203854E-11 1.897210787590633E-9 -9.736099938706559E-12
i -8.163325377904687E-15 2.1980266976715E-14 -1.027043086846287E-11 8.273454760650206E-12 -9.736099938706559E-12 4.945171841780732E-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 14.68   n/a E2021B55  

120782 (1998 EM12)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 EM12 = 2000 QA138 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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