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91495 (1999 RZ138)
Classification: Main-belt Asteroid          SPK-ID: 2091495
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2624737770242963 4.0056e-08  
a 2.73133202635595 1.3547e-08 au
q 2.014428993090879 1.1025e-07 au
i 9.529920054994804 4.7965e-06 deg
node 211.2615858323635 2.6836e-05 deg
peri 164.4432663639781 2.7971e-05 deg
M 188.9736936542624 9.6331e-06 deg
tp 2459783.786403661625
(2022-Jul-23.28640366)
4.7437e-05 TDB
period 1648.770363713188
4.51
1.2267e-05
3.359e-08
d
yr
n .2183445359784644 1.6245e-09 deg/d
Q 3.448235059621022 1.7103e-08 au
  Orbit Determination Parameters
   # obs. used (total)      884  
   data-arc span      10810 days (29.60 yr)  
   first obs. used      1990-09-22  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4992  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:41:37  

Additional Information
 Earth MOID = 1.01809 au 
 Jupiter MOID = 2.02943 au 
 T_jup = 3.284 
[ 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 14.7   n/a MPO280380  

91495 (1999 RZ138)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RZ138 = 1990 TN5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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