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JPL Small-Body Database Browser
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20464 (1999 MD1)
Classification: Main-belt Asteroid          SPK-ID: 2020464
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1723546723768868 4.1933e-08  
a 2.324298001573718 9.0482e-09 au
q 1.923694381006227 9.9712e-08 au
i 6.078351999085465 5.5721e-06 deg
node 160.0353079423639 3.7647e-05 deg
peri 249.0345653087982 4.0762e-05 deg
M 113.8484131005393 1.7032e-05 deg
tp 2458191.182209816562
(2018-Mar-13.68220982)
6.0144e-05 TDB
period 1294.30354322031
3.54
7.5578e-06
2.069e-08
d
yr
n .2781418639280683 1.6242e-09 deg/d
Q 2.72490162214121 1.0608e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1137  
   data-arc span      10202 days (27.93 yr)  
   first obs. used      1991-05-06  
   last obs. used      2019-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56745  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:41:34  

Additional Information
 Earth MOID = .9428 au 
 Jupiter MOID = 2.66752 au 
 T_jup = 3.548 
[ 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 15.3   n/a MPO365497  
diameter diameter 2.163 km 0.499 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.344   0.270 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20464 (1999 MD1)          Discovered 1999-Jun-24 by Zoltowski, F. B. at Woomera
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 MD1 = 1998 FX146 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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