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19784 (2000 QJ81)
Classification: Outer Main-belt Asteroid          SPK-ID: 2019784
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06083065762660037 4.1716e-08  
a 3.20811935844305 2.1637e-08 au
q 3.012967348124332 1.3603e-07 au
i 8.635580927612814 4.8215e-06 deg
node 165.5000342522118 2.6921e-05 deg
peri 49.42250756253317 4.3641e-05 deg
M 312.7394602397689 3.4041e-05 deg
tp 2459476.030944102761
(2021-Sep-18.53094410)
0.00019866 TDB
period 2098.815214134761
5.75
2.1233e-05
5.813e-08
d
yr
n .1715253432391429 1.7352e-09 deg/d
Q 3.403271368761768 2.2953e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1062  
   data-arc span      9685 days (26.52 yr)  
   first obs. used      1994-09-08  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57633  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:07:06  

Additional Information
 Earth MOID = 2.01564 au 
 Jupiter MOID = 1.57766 au 
 T_jup = 3.172 
[ 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 14.19   n/a E2021B10  
diameter diameter 5.376 km 0.268 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.121   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19784 (2000 QJ81)          Discovered 2000-Aug-24 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 QJ81 = 1998 FE120 = 1999 ND45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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