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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2524118918435906 7.8895e-08  
a 3.192429260658055 4.8446e-08 AU
q 2.38662215139852 2.4301e-07 AU
i 12.31650671002944 8.5947e-06 deg
node 304.2558893647754 4.0665e-05 deg
peri 199.0863592547157 4.4084e-05 deg
M 148.9498106199023 2.3538e-05 deg
tp 2456138.479080123164
(2012-Jul-29.97908012)
0.0001295 JED
period 2083.436896389016
5.70
4.7425e-05
1.298e-07
d
yr
n .1727914104928962 3.9332e-09 deg/d
Q 3.998236369917591 6.0674e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      548  
   data-arc span      11141 days (30.50 yr)  
   first obs. used      1984-01-26  
   last obs. used      2014-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49604  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:34:59  

Additional Information
 Earth MOID = 1.40374 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 13.0 mag n/a MPO302192  
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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