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101855 (1999 JG118)
Classification: Main-belt Asteroid          SPK-ID: 2101855
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .137802145987629 3.4421e-08  
a 2.37812587724519 1.0475e-08 au
q 2.05041502793209 8.069e-08 au
i 3.476533621289657 4.1574e-06 deg
node 88.59550389795645 6.7136e-05 deg
peri 157.9502954533871 6.9043e-05 deg
M 311.3534012547747 1.7059e-05 deg
tp 2459381.509206653709
(2021-Jun-16.00920665)
6.3895e-05 TDB
period 1339.524572655369
3.67
8.85e-06
2.423e-08
d
yr
n .2687520687182051 1.7756e-09 deg/d
Q 2.70583672655829 1.1918e-08 au
  Orbit Determination Parameters
   # obs. used (total)      850  
   data-arc span      10993 days (30.10 yr)  
   first obs. used      1991-02-08  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58615  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:01  

Additional Information
 Earth MOID = 1.03571 au 
 Jupiter MOID = 2.31237 au 
 T_jup = 3.525 
[ 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 15.71   n/a E2021B55  
diameter diameter 3.863 km 0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

101855 (1999 JG118)          Discovered 1999-May-13 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 JG118 = 2002 AP115 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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