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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1157989103449273 3.5493e-08  
a 2.566470420642749 1.0633e-08 au
q 2.269275942499831 9.0312e-08 au
i 15.17607344828257 3.5974e-06 deg
node 150.7013976235463 1.7126e-05 deg
peri 134.4317065049911 2.4532e-05 deg
M 142.8963230907646 1.8556e-05 deg
tp 2458404.396907430131
(2018-Oct-12.89690743)
7.6749e-05 TDB
period 1501.767915951522
4.11
9.3331e-06
2.555e-08
d
yr
n .2397174664448092 1.4898e-09 deg/d
Q 2.863664898785666 1.1865e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1216  
   data-arc span      8148 days (22.31 yr)  
   first obs. used      1998-07-26  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5328  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:00:08  

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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2060-Mar-08 13:21 < 00:01 Thisb 0.0285808729820239 0.0285696250604098 0.0285921243818185 6.84513967794332 6.84513964309218 2473527.056182332 0.727570279518974 750.291647986587 40.0202752360067 -41.6953523524683 71175.6334177005 T 28 CATAB v2.0f-lin.ifort 2020-Dec-17 22:00:10 2020-Dec-17 22:00
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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