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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456904.5 (2014-Sep-04.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1788058489920129 4.1737e-08  
q 2.528010406487093 1.3105e-07 au
tp 2457327.677509797048
(2015-Nov-01.17750980)		 9.2531e-05 TDB
node 132.0596633274401 2.1667e-05 deg
peri 120.5405858505283 2.7895e-05 deg
i 14.39738794978472 5.3171e-06 deg
   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
 Jupiter MOID = 1.68738 au 
 T_jup = 3.157 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.741978383504295E-15 -5.411456710933268E-15 -4.791143221358606E-13 1.764017468078735E-15 -7.013614712623673E-14 -5.049042388778279E-16
q -5.411456710933268E-15 1.717333168382123E-14 1.918270340472149E-12 -4.261795249120019E-15 2.687386334169153E-13 9.218945032364116E-16
tp -4.791143221358606E-13 1.918270340472149E-12 8.561998718755778E-9 -4.477126054628683E-11 1.664675583868843E-9 -4.282669589624258E-12
node 1.764017468078735E-15 -4.261795249120019E-15 -4.477126054628683E-11 4.694480946986131E-10 -4.622758797432258E-10 2.209548089282335E-11
peri -7.013614712623673E-14 2.687386334169153E-13 1.664675583868843E-9 -4.622758797432258E-10 7.781376398194161E-10 -2.218790468794068E-11
i -5.049042388778279E-16 9.218945032364116E-16 -4.282669589624258E-12 2.209548089282335E-11 -2.218790468794068E-11 2.827131518810126E-11

[ 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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