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JPL Small-Body Database Browser
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212311 (2005 QM20)
Classification: Main-belt Asteroid          SPK-ID: 2212311
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .18938151557349 6.1376e-08  
a 3.097262739930556 3.8631e-08 au
q 2.510698428113207 1.945e-07 au
i 4.20582531982773 7.6814e-06 deg
node 150.6159329071321 9.3734e-05 deg
peri 164.8878986661788 9.5754e-05 deg
M 200.2011566457906 2.1342e-05 deg
tp 2459484.264657173290
(2021-Sep-26.76465717)
0.00012482 TDB
period 1990.973588445586
5.45
3.7249e-05
1.02e-07
d
yr
n .1808160600869964 3.3829e-09 deg/d
Q 3.683827051747904 4.5947e-08 au
  Orbit Determination Parameters
   # obs. used (total)      297  
   data-arc span      7620 days (20.86 yr)  
   first obs. used      1998-04-17  
   last obs. used      2019-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65369  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:27:21  

Additional Information
 Earth MOID = 1.49655 au 
 Jupiter MOID = 1.62652 au 
 T_jup = 3.191 
[ 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 15.6   n/a MPO433387  
diameter diameter 3.989 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.064   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

212311 (2005 QM20)          Discovered 2005-Aug-26 by LONEOS at Anderson Mesa
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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