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18297 (1978 VG4)
Classification: Main-belt Asteroid          SPK-ID: 2018297
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .009285621612053206 4.3608e-08  
a 2.720890351191189 1.3233e-08 au
q 2.695625192942141 1.2228e-07 au
i 3.393437657831955 3.8191e-06 deg
node 57.66492457447342 7.6779e-05 deg
peri 133.8931579878336 0.00023398 deg
M 326.4670271419778 0.00022055 deg
tp 2459153.198420350835
(2020-Oct-30.69842035)
0.0010043 TDB
period 1639.324719554342
4.49
1.1959e-05
3.274e-08
d
yr
n .2196026178985868 1.6021e-09 deg/d
Q 2.746155509440237 1.3356e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1204  
   data-arc span      15150 days (41.48 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5435  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:47:16  

Additional Information
 Earth MOID = 1.69095 au 
 Jupiter MOID = 2.20965 au 
 T_jup = 3.356 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457028.5 (2015-Jan-06.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01095801574051195 4.2864e-08  
q 2.690582648947407 1.2051e-07 au
tp 2457542.324872360498
(2016-Jun-02.82487236)
0.00087224 TDB
node 57.74756422811151 7.6811e-05 deg
peri 140.2527998709555 0.00020666 deg
i 3.393367935898743 3.8176e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1204  
   data-arc span      15150 days (41.48 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5435  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:47:16  

Additional Information
 Jupiter MOID = 2.20965 au 
 T_jup = 3.356 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.837280943830037E-15 -5.137029976213131E-15 -6.396395585340746E-12 -8.675865798680026E-16 -1.332212415777009E-12 -7.475252458605266E-16
q -5.137029976213131E-15 1.452369022437078E-14 1.766954465964917E-11 2.777894281411796E-15 3.666172394532297E-12 2.25848113817533E-15
tp -6.396395585340746E-12 1.766954465964917E-11 7.60799843555007E-7 -1.913673127009155E-10 1.673588633612905E-7 1.912958799494436E-11
node -8.675865798680026E-16 2.777894281411796E-15 -1.913673127009155E-10 5.899987737742859E-9 -5.931546343511258E-9 -1.532671254540466E-11
peri -1.332212415777009E-12 3.666172394532297E-12 1.673588633612905E-7 -5.931546343511258E-9 4.270666491362721E-8 1.946770231429393E-11
i -7.475252458605266E-16 2.25848113817533E-15 1.912958799494436E-11 -1.532671254540466E-11 1.946770231429393E-11 1.457440110002549E-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 14.8   n/a MPO365472  

18297 (1978 VG4)          Discovered 1978-Nov-07 by Helin, E. F., Bus, S. J. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1978 VG4 = 1998 FC36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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