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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1981259880316969 4.5588e-08  
a 3.058399270970434 2.4717e-08 au
q 2.452450893613995 1.4616e-07 au
i 13.71417612377263 5.1291e-06 deg
node 253.3940752713512 2.4989e-05 deg
peri 142.7681711488484 3.0295e-05 deg
M 346.7829806255723 1.8119e-05 deg
tp 2459072.225027751492
(2020-Aug-10.72502775)
9.8737e-05 TDB
period 1953.618229575691
5.35
2.3683e-05
6.484e-08
d
yr
n .1842734647691063 2.2339e-09 deg/d
Q 3.664347648326872 2.9614e-08 au
  Orbit Determination Parameters
   # obs. used (total)      707  
   data-arc span      7706 days (21.10 yr)  
   first obs. used      1998-08-19  
   last obs. used      2019-09-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49979  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:53:35  

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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