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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09873953817228628 4.6498e-08  
a 2.983131747942404 2.718e-08 au
q 2.688578696843486 1.468e-07 au
i 12.97203313034919 5.1628e-06 deg
node 111.5459908216825 2.8661e-05 deg
peri 8.858049863232436 5.2664e-05 deg
M 334.3036848472824 4.2453e-05 deg
tp 2458734.830746216720
(2019-Sep-08.33074622)		 0.0002224 TDB
period 1881.945654488319
5.15		 2.5721e-05
7.042e-08		 d
yr
n .1912913899194821 2.6144e-09 deg/d
Q 3.277684799041322 2.9864e-08 au
   Orbit Determination Parameters
   # obs. used (total)      526  
   data-arc span      7351 days (20.13 yr)  
   first obs. used      1998-12-10  
   last obs. used      2019-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58905  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 10:35:47  

Additional Information
 Earth MOID = 1.70576 au 
 Jupiter MOID = 1.82583 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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