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91164 (1998 QE84)
Classification: Main-belt Asteroid          SPK-ID: 2091164
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01759879593509716 4.1123e-08  
a 3.178316650146664 2.6635e-08 au
q 3.122382104003611 1.3336e-07 au
i 14.54507273466526 5.6111e-06 deg
node 292.0723271669124 2.0028e-05 deg
peri 113.8694958988296 0.00020035 deg
M 245.70039235172 0.00020031 deg
tp 2459657.607479046028
(2022-Mar-19.10747905)
0.0011552 TDB
period 2069.63695959922
5.67
2.6016e-05
7.123e-08
d
yr
n .1739435500174451 2.1866e-09 deg/d
Q 3.234251196289716 2.7104e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1119  
   data-arc span      8015 days (21.94 yr)  
   first obs. used      1998-08-19  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51849  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:15:55  

Additional Information
 Earth MOID = 2.16014 au 
 Jupiter MOID = 1.93125 au 
 T_jup = 3.150 
[ 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 13.6   n/a MPO436409  
diameter diameter 11.447 km 1.650 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.054   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

91164 (1998 QE84)          Discovered 1998-Aug-24 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 QE84 = 1999 XE182 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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