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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2523858456038364 8.2027e-08  
a 3.192220318473066 5.0359e-08 AU
q 2.386549094041494 2.5644e-07 AU
i 12.31642721442874 8.6832e-06 deg
node 304.2562049060804 4.4165e-05 deg
peri 199.0581348657692 4.7726e-05 deg
M 114.4334552126168 2.367e-05 deg
tp 2456138.301452689176
(2012-Jul-29.80145269)
0.00013305 JED
period 2083.232360579924
5.70
4.9296e-05
1.35e-07
d
yr
n .172808375489993 4.0892e-09 deg/d
Q 3.997891542904639 6.3068e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      541  
   data-arc span      11120 days (30.44 yr)  
   first obs. used      1984-01-26  
   last obs. used      2014-07-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49864  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:45:28  

Additional Information
 Earth MOID = 1.40337 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 12.9 mag n/a MPO266064  
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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