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JPL Small-Body Database Browser
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48954 (1998 QD21)
Classification: Main-belt Asteroid          SPK-ID: 2048954
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04763492533716683 3.3453e-08  
a 2.406604313529585 8.9061e-09 au
q 2.2919658967385 7.9326e-08 au
i 2.001758107057871 4.1351e-06 deg
node 182.4154568039533 0.00010174 deg
peri 288.2292338496206 0.00011141 deg
M 57.15594649138509 4.4563e-05 deg
tp 2458383.996768353624
(2018-Sep-22.49676835)
0.00016873 TDB
period 1363.657994963711
3.73
7.5698e-06
2.072e-08
d
yr
n .2639958122414558 1.4655e-09 deg/d
Q 2.521242730320671 9.3304e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1498  
   data-arc span      7569 days (20.72 yr)  
   first obs. used      1998-08-17  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54431  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:39:37  

Additional Information
 Earth MOID = 1.30978 au 
 Jupiter MOID = 2.51432 au 
 T_jup = 3.520 
[ 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 14.9   n/a MPO436125  

48954 (1998 QD21)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 QD21 = 1999 XU90 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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