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118388 (1999 JR42)
Classification: Main-belt Asteroid          SPK-ID: 2118388
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1538968056577104 5.082e-08  
a 2.411190331148199 1.5208e-08 au
q 2.040115841351735 1.1827e-07 au
i 1.476226747682079 4.7217e-06 deg
node 254.5946192293871 0.0001996 deg
peri 285.7687287118791 0.00020031 deg
M 262.4099459899488 2.1529e-05 deg
tp 2459371.222311764682
(2021-Jun-05.72231176)
8.4438e-05 TDB
period 1367.557724904424
3.74
1.2938e-05
3.542e-08
d
yr
n .2632430013330221 2.4904e-09 deg/d
Q 2.782264820944664 1.7548e-08 au
  Orbit Determination Parameters
   # obs. used (total)      554  
   data-arc span      7496 days (20.52 yr)  
   first obs. used      1999-05-10  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55198  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 09:52:35  

Additional Information
 Earth MOID = 1.04381 au 
 Jupiter MOID = 2.18304 au 
 T_jup = 3.503 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO459558  
diameter diameter 1.682 km 0.438 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.273   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118388 (1999 JR42)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 1999 JR42 = 2001 XW4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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