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100020 (1990 QH4)
Classification: Main-belt Asteroid          SPK-ID: 2100020
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1892993776981179 5.4415e-08  
a 2.225297768221438 5.5293e-09 au
q 1.804050285504109 1.2065e-07 au
i 4.48094404580679 5.419e-06 deg
node 346.689729430971 4.7608e-05 deg
peri 358.5441124891373 4.8721e-05 deg
M 40.83503761436125 1.0009e-05 deg
tp 2459062.965679974397
(2020-Aug-01.46567997)
3.3689e-05 TDB
period 1212.496867930006
3.32
4.5191e-06
1.237e-08
d
yr
n .2969079834528544 1.1066e-09 deg/d
Q 2.646545250938767 6.576e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1088  
   data-arc span      11106 days (30.41 yr)  
   first obs. used      1990-08-16  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49292  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:24:05  

Additional Information
 Earth MOID = .794911 au 
 Jupiter MOID = 2.76055 au 
 T_jup = 3.619 
[ 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 16.12   n/a E2021B55  
diameter diameter 3.577 km 0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100020 (1990 QH4)          Discovered 1990-Aug-23 by Holt, H. E. at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1990 QH4 = 2000 QG28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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