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120783 (1998 EN19)
Classification: Main-belt Asteroid          SPK-ID: 2120783
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .177855772593019 5.9492e-08  
a 2.564017776766117 1.3767e-08 au
q 2.107992414137144 1.5763e-07 au
i 5.153443072772489 4.1598e-06 deg
node 340.8400972629919 7.9371e-05 deg
peri 128.9477703228291 8.2011e-05 deg
M 185.74907297369 2.2888e-05 deg
tp 2459726.359509988493
(2022-May-26.85950999)
9.8965e-05 TDB
period 1499.615686729761
4.11
1.2078e-05
3.307e-08
d
yr
n .2400615058815892 1.9334e-09 deg/d
Q 3.02004313939509 1.6215e-08 au
  Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      7734 days (21.17 yr)  
   first obs. used      1998-03-01  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54286  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:58:14  

Additional Information
 Earth MOID = 1.12905 au 
 Jupiter MOID = 2.10324 au 
 T_jup = 3.405 
[ show covariance matrix ]

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 16.0   n/a MPO436583  
rotation period rot_per 6.616 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

120783 (1998 EN19)          Discovered 1998-Mar-03 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 EN19 = 2002 AA11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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