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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2547330910346172 5.0215e-08  
a 3.19788842851215 2.3859e-08 au
q 2.383280424333416 1.6453e-07 au
i 12.37177820856896 5.6564e-06 deg
node 304.033921788186 2.1434e-05 deg
peri 200.1370981222072 2.3067e-05 deg
M 133.2180297856384 8.3629e-06 deg
tp 2458227.545564253153
(2018-Apr-19.04556425)
4.9921e-05 TDB
period 2088.783307459359
5.72
2.3376e-05
6.4e-08
d
yr
n .1723491367986262 1.9288e-09 deg/d
Q 4.012496432690884 2.9937e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1377  
   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      .43814  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:12:34  

Additional Information
 Earth MOID = 1.40031 au 
 Jupiter MOID = 1.09 au 
 T_jup = 3.108 
[ 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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