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21108 (1992 QT)
Classification: Main-belt Asteroid          SPK-ID: 2021108
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1854762473784437 1.156e-08  
a 2.311309062921848 6.6886e-09 au
q 1.882616131399316 2.6353e-08 au
i 26.43527110130983 7.5401e-07 deg
node 338.0191251026858 1.3119e-06 deg
peri 304.5662150965803 3.191e-06 deg
M 62.10545230415246 3.5002e-06 deg
tp 2458979.082119883424
(2020-May-09.58211988)
1.2347e-05 TDB
period 1283.469226688777
3.51
5.5713e-06
1.525e-08
d
yr
n .2804897791969381 1.2176e-09 deg/d
Q 2.740001994444379 7.9292e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1614  
   data-arc span      10391 days (28.45 yr)  
   first obs. used      1992-08-31  
   last obs. used      2021-02-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43573  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:53:46  

Additional Information
 Earth MOID = .946173 au 
 Jupiter MOID = 2.75221 au 
 T_jup = 3.424 
[ 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 14.19   n/a E2021B10  
diameter diameter 6.666 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.100   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21108 (1992 QT)          Discovered 1992-Aug-31 by Helin, E. F. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1992 QT = 1999 RV28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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