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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1894569835382288 5.5635e-08  
a 2.225675867347841 1.152e-08 au
q 1.804006031186288 1.2478e-07 au
i 4.480710137221541 6.1495e-06 deg
node 346.690772773834 6.1075e-05 deg
peri 358.520177611339 6.3255e-05 deg
M 341.4730186702161 2.2162e-05 deg
tp 2459062.915645341468
(2020-Aug-01.41564534)		 7.504e-05 TDB
period 1212.805903075337
3.32		 9.4164e-06
2.578e-08		 d
yr
n .2968323283116783 2.3047e-09 deg/d
Q 2.647345703509394 1.3703e-08 au
   Orbit Determination Parameters
   # obs. used (total)      693  
   data-arc span      10486 days (28.71 yr)  
   first obs. used      1990-08-16  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55995  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:34:02  

Additional Information
 Earth MOID = .796671 au 
 Jupiter MOID = 2.75934 au 
 T_jup = 3.618 
[ 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 MPO333615  
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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