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

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2523362524904794 7.8847e-08  
a 3.192263133071821 4.3495e-08 au
q 2.386739417108962 2.43e-07 au
i 12.31318226099172 8.3752e-06 deg
node 304.2430179270533 3.5549e-05 deg
peri 199.18168456 3.9074e-05 deg
M 252.4903805588988 2.4496e-05 deg
tp 2458222.644511510526
(2018-Apr-14.14451151)
0.0001496 JED
period 2083.274271717533
5.70
4.2578e-05
1.166e-07
d
yr
n .172804898945544 3.5318e-09 deg/d
Q 3.997786849034681 5.4471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      628  
   data-arc span      11587 days (31.72 yr)  
   first obs. used      1984-01-26  
   last obs. used      2015-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49122  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-28 16:45:51  

Additional Information
 Earth MOID = 1.40225 au 
 Jupiter MOID = 1.10734 au 
 T_jup = 3.111 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1 mag n/a MPO347684  
diameter diameter 16.03 km 1.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
geometric albedo albedo 0.0329   0.006 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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