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74384 (1998 XQ20)
Classification: Main-belt Asteroid          SPK-ID: 2074384
[ 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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09844619852920829 4.2307e-08  
a 2.982072375281774 2.1232e-08 au
q 2.688498686196317 1.2754e-07 au
i 12.97290176367269 4.7063e-06 deg
node 111.5470427254327 2.4971e-05 deg
peri 8.7329775053059 4.918e-05 deg
M 50.95055951743539 3.9218e-05 deg
tp 2458734.291356057168
(2019-Sep-07.79135606)		 0.0002048 TDB
period 1880.943265924774
5.15		 2.0088e-05
5.5e-08		 d
yr
n .191393332548499 2.0441e-09 deg/d
Q 3.275646064367231 2.3322e-08 au
   Orbit Determination Parameters
   # obs. used (total)      764  
   data-arc span      7837 days (21.46 yr)  
   first obs. used      1998-12-10  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52635  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:43:55  

Additional Information
 Earth MOID = 1.70536 au 
 Jupiter MOID = 1.82666 au 
 T_jup = 3.213 
[ 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 14.7   n/a MPO324953  
diameter diameter 3.551 km 0.786 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.202   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74384 (1998 XQ20)          Discovered 1998-Dec-10 by Spacewatch at Kitt Peak
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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