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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156791438926659 3.4171e-08  
a 2.566822838632902 1.0262e-08 au
q 2.269894970135706 8.758e-08 au
i 15.17675087382822 3.4867e-06 deg
node 150.6969567654153 1.5445e-05 deg
peri 134.5005832604226 2.2126e-05 deg
M 190.7573116545351 1.753e-05 deg
tp 2459906.654422951915
(2022-Nov-23.15442295)
7.4681e-05 TDB
period 1502.077252186958
4.11
9.0079e-06
2.466e-08
d
yr
n .2396680992777542 1.4373e-09 deg/d
Q 2.863750707130099 1.1449e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1484  
   data-arc span      8273 days (22.65 yr)  
   first obs. used      1998-07-26  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5003  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:18:39  

Additional Information
 Earth MOID = 1.27645 au 
 Jupiter MOID = 2.44508 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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