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21538 (1998 QN1)
Classification: Main-belt Asteroid          SPK-ID: 2021538
[ 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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1179210828292351 3.767e-08  
a 3.074401029963266 1.5649e-08 au
q 2.711864331458682 1.1198e-07 au
i 1.149413502888559 3.8167e-06 deg
node 232.0124206941783 0.00017865 deg
peri 100.8488119467084 0.00017938 deg
M 52.49628381545563 1.5438e-05 deg
tp 2458913.378798601941
(2020-Mar-04.87879860)		 8.439e-05 TDB
period 1968.970467827091
5.39		 1.5033e-05
4.116e-08		 d
yr
n .1828366681381907 1.3959e-09 deg/d
Q 3.43693772846785 1.7494e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1729  
   data-arc span      14959 days (40.96 yr)  
   first obs. used      1980-03-23  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48229  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:47:40  

Additional Information
 Earth MOID = 1.6999 au 
 Jupiter MOID = 1.9064 au 
 T_jup = 3.219 
[ 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 13.84   n/a E2021B10  

21538 (1998 QN1)          Discovered 1998-Aug-17 by Visnjan at Visnjan
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 QN1 = 1980 FW8 = 1993 TM44 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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