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91166 (1998 QT84)
Classification: Main-belt Asteroid          SPK-ID: 2091166
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1981259875843717 4.3839e-08  
a 3.058399280268385 2.2173e-08 au
q 2.452450902437879 1.3889e-07 au
i 13.71417436897593 5.0055e-06 deg
node 253.39407389132 2.3793e-05 deg
peri 142.7681761676081 2.8491e-05 deg
M 346.7829743585472 1.5637e-05 deg
tp 2459072.225062087946
(2020-Aug-10.72506209)
8.5114e-05 TDB
period 1953.61823848459
5.35
2.1245e-05
5.817e-08
d
yr
n .1842734639287817 2.0039e-09 deg/d
Q 3.66434765809889 2.6566e-08 au
  Orbit Determination Parameters
   # obs. used (total)      749  
   data-arc span      8018 days (21.95 yr)  
   first obs. used      1998-08-19  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48831  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:15:55  

Additional Information
 Earth MOID = 1.47604 au 
 Jupiter MOID = 1.80801 au 
 T_jup = 3.161 
[ 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 14.1   n/a MPO449560  
diameter diameter 8.002 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.076   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91166 (1998 QT84)          Discovered 1998-Aug-24 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 QT84 = 2000 AE181 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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