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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .115798910846016 3.552e-08  
a 2.566470420789174 1.0643e-08 au
q 2.269275941343271 9.0369e-08 au
i 15.17607348116583 3.6011e-06 deg
node 150.7013978109284 1.7154e-05 deg
peri 134.4317058271676 2.4583e-05 deg
M 142.8963234835153 1.8583e-05 deg
tp 2458404.396905740727
(2018-Oct-12.89690574)
7.6876e-05 TDB
period 1501.767916080042
4.11
9.3413e-06
2.558e-08
d
yr
n .2397174664242943 1.4911e-09 deg/d
Q 2.863664900235076 1.1875e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      8125 days (22.25 yr)  
   first obs. used      1998-07-26  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53356  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:45:02  

Additional Information
 Earth MOID = 1.27782 au 
 Jupiter MOID = 2.44576 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 14.6   n/a MPO502605  
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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