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JPL Small-Body Database Browser
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74098 (1998 QA21)
Classification: Main-belt Asteroid          SPK-ID: 2074098
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1158844749081668 3.6571e-08  
a 2.565732639203878 1.0802e-08 au
q 2.268404059554991 9.3436e-08 au
i 15.17692528851376 3.7493e-06 deg
node 150.7098391903083 1.7271e-05 deg
peri 134.2717450452076 2.4725e-05 deg
M 47.13894114018179 1.8506e-05 deg
tp 2458403.941039142031
(2018-Oct-12.44103914)
7.6971e-05 TDB
period 1501.12039424982
4.11
9.4802e-06
2.596e-08
d
yr
n .2398208707169745 1.5146e-09 deg/d
Q 2.863061218852764 1.2054e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1156  
   data-arc span      7795 days (21.34 yr)  
   first obs. used      1998-07-26  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53837  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 06:44:46  

Additional Information
 Earth MOID = 1.27638 au 
 Jupiter MOID = 2.44475 au 
 T_jup = 3.374 
[ 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 14.5   n/a MPO359264  
diameter diameter 3.020 km 0.576 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.405   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74098 (1998 QA21)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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