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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456931.5 (2014-Oct-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1165318596659276 3.6345e-08  
q 2.267178835827226 9.2905e-08 au
tp 2456904.744264906894
(2014-Sep-04.24426491)
7.6092e-05 TDB
node 150.7622867603517 1.7259e-05 deg
peri 134.7656704058896 2.4698e-05 deg
i 15.18224296707546 3.7507e-06 deg
  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
 Jupiter MOID = 2.44475 au 
 T_jup = 3.374 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.320947596186446E-15 -3.358871454233662E-15 -6.708374732846382E-13 -1.028186265205947E-14 -1.604950073254751E-13 -2.775460221371443E-15
q -3.358871454233662E-15 8.631389632639031E-15 1.731205486519184E-12 2.801648657500369E-14 4.129658867688672E-13 7.784497457539611E-15
tp -6.708374732846382E-13 1.731205486519184E-12 5.790057103759838E-9 3.580100104878634E-11 1.371121736710689E-9 1.040156047073293E-12
node -1.028186265205947E-14 2.801648657500369E-14 3.580100104878634E-11 2.97876737629131E-10 -2.784773550800808E-10 3.029485117579257E-12
peri -1.604950073254751E-13 4.129658867688672E-13 1.371121736710689E-9 -2.784773550800808E-10 6.100000810878141E-10 -2.62111309074726E-12
i -2.775460221371443E-15 7.784497457539611E-15 1.040156047073293E-12 3.029485117579257E-12 -2.62111309074726E-12 1.40678614520795E-11

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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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