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JPL Small-Body Database Browser
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74407 (1998 YJ21)
Classification: Outer Main-belt Asteroid          SPK-ID: 2074407
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 .0848896024292289 4.4977e-08  
a 3.213693823257992 2.5377e-08 au
q 2.940884632272352 1.4178e-07 au
i 11.66419574237981 4.981e-06 deg
node 120.7900862815014 2.9461e-05 deg
peri 115.3250079449238 4.6572e-05 deg
M 80.21610964383757 3.7031e-05 deg
tp 2458131.617235716728
(2018-Jan-13.11723572)
0.00021565 TDB
period 2104.287977707298
5.76
2.4925e-05
6.824e-08
d
yr
n .1710792457181805 2.0264e-09 deg/d
Q 3.486503014243632 2.7532e-08 au
  Orbit Determination Parameters
   # obs. used (total)      795  
   data-arc span      7623 days (20.87 yr)  
   first obs. used      1998-12-13  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60106  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 08:52:34  

Additional Information
 Earth MOID = 1.95183 au 
 Jupiter MOID = 1.68271 au 
 T_jup = 3.153 
[ 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 14.1   n/a MPO280225  
diameter diameter 8.313 km 0.447 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.064   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74407 (1998 YJ21)          Discovered 1998-Dec-26 by Spacewatch at Kitt Peak
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 YJ21 = 2000 EX141 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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