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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1853816861542816 1.156e-08  
a 2.311212658990355 6.6504e-09 au
q 1.882756159205603 2.6323e-08 au
i 26.43541045163293 7.54e-07 deg
node 338.0190989562286 1.3119e-06 deg
peri 304.5539103578394 3.1914e-06 deg
M 117.1072779805537 3.5456e-06 deg
tp 2458979.016155726401
(2020-May-09.51615573)		 1.2343e-05 TDB
period 1283.388927914906
3.51		 5.5393e-06
1.517e-08		 d
yr
n .2805073288148778 1.2107e-09 deg/d
Q 2.739669158775108 7.8833e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43565  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:39:30  

Additional Information
 Earth MOID = .947572 au 
 Jupiter MOID = 2.7521 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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