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JPL Small-Body Database Browser
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20741 Jeanmichelreess (1999 XA230)
Classification: Main-belt Asteroid          SPK-ID: 2020741
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2524184342925787 4.9437e-08  
a 3.193444695811227 1.9428e-08 au
q 2.387360385694617 1.5893e-07 au
i 12.31509969924784 5.6543e-06 deg
node 304.1915277064437 2.1639e-05 deg
peri 199.4776338063101 2.3348e-05 deg
M 65.10200821455548 8.7115e-06 deg
tp 2458223.553764195533
(2018-Apr-15.05376420)
5.1023e-05 TDB
period 2084.431012364194
5.71
1.9022e-05
5.208e-08
d
yr
n .1727090020560011 1.5761e-09 deg/d
Q 3.999529005927838 2.4333e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1226  
   data-arc span      12988 days (35.56 yr)  
   first obs. used      1984-01-26  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45515  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:30:32  

Additional Information
 Earth MOID = 1.40461 au 
 Jupiter MOID = 1.10155 au 
 T_jup = 3.111 
[ 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 13.1   n/a MPO347684  
diameter diameter 14.210 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20741 Jeanmichelreess           Discovered 1999 Dec. 7 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Jean-Michel Reess (b. 1967) is an engineer at Paris Observatory. He is developing the optics of new-generation instruments for space missions.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18

[ show close-approach data ]
Alternate Designations
 1999 XA230 = 1984 BH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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