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91381 (1999 JR109)
Classification: Main-belt Asteroid          SPK-ID: 2091381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2407092284857919 1.011e-07  
a 2.559638836530862 1.4577e-08 au
q 1.943510146987249 2.6446e-07 au
i 14.32261362618675 6.2143e-06 deg
node 64.74126411826586 1.5645e-05 deg
peri 349.967827293627 1.9238e-05 deg
M 318.4141624247156 8.8319e-06 deg
tp 2459569.286344019136
(2021-Dec-20.78634402)
3.7439e-05 TDB
period 1495.775664834947
4.10
1.2778e-05
3.498e-08
d
yr
n .2406778024696133 2.056e-09 deg/d
Q 3.175767526074476 1.8086e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1403  
   data-arc span      8123 days (22.24 yr)  
   first obs. used      1999-05-13  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42527  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:09  

Additional Information
 Earth MOID = .956694 au 
 Jupiter MOID = 2.19668 au 
 T_jup = 3.352 
[ 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 13.88   n/a MPCxxxxx  
diameter diameter 9.696 km 0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.047   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91381 (1999 JR109)          Discovered 1999-May-13 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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