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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156254913362911 3.4049e-08  
a 2.566793776486338 1.0267e-08 au
q 2.270006984921171 8.7299e-08 au
i 15.17761870654774 3.4853e-06 deg
node 150.6956820586629 1.5267e-05 deg
peri 134.5521912648399 2.1941e-05 deg
M 237.6679252952749 1.7576e-05 deg
tp 2459906.914183081845
(2022-Nov-23.41418308)
7.4484e-05 TDB
period 1502.051741973494
4.11
9.0118e-06
2.467e-08
d
yr
n .2396721696996991 1.438e-09 deg/d
Q 2.863580568051504 1.1454e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1494  
   data-arc span      8323 days (22.79 yr)  
   first obs. used      1998-07-26  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49953  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 22:53:49  

Additional Information
 Earth MOID = 1.27798 au 
 Jupiter MOID = 2.44429 au 
 T_jup = 3.374 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.57   n/a MPCxxxxx  
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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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