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101849 (1999 JJ91)
Classification: Main-belt Asteroid          SPK-ID: 2101849
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1793736590021491 4.1628e-08  
a 3.076168403255963 2.3211e-08 au
q 2.524384821057142 1.3095e-07 au
i 14.40072417316449 5.3185e-06 deg
node 132.0277259252198 2.1667e-05 deg
peri 121.1294510198077 2.7886e-05 deg
M 304.8248434635198 1.8011e-05 deg
tp 2459302.533183736538
(2021-Mar-29.03318374)
0.00010006 TDB
period 1970.66855756473
5.40
2.2304e-05
6.107e-08
d
yr
n .1826791210617746 2.0676e-09 deg/d
Q 3.627951985454783 2.7374e-08 au
  Orbit Determination Parameters
   # obs. used (total)      696  
   data-arc span      7731 days (21.17 yr)  
   first obs. used      1999-05-12  
   last obs. used      2020-07-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:58:12  

Additional Information
 Earth MOID = 1.54415 au 
 Jupiter MOID = 1.68738 au 
 T_jup = 3.157 
[ 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 14.6   n/a MPO385429  
diameter diameter 4.308 km 0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.151   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101849 (1999 JJ91)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 JJ91 = 2004 EG15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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