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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08457132543233256 4.4666e-08  
a 3.214288725970354 2.5082e-08 au
q 2.942452068092838 1.404e-07 au
i 11.66400075160115 4.9163e-06 deg
node 120.7871162087644 2.9412e-05 deg
peri 115.3835931232034 4.6602e-05 deg
M 148.6103536303648 3.7272e-05 deg
tp 2458131.594950125927
(2018-Jan-13.09495013)
0.00021635 TDB
period 2104.872307434928
5.76
2.4637e-05
6.745e-08
d
yr
n .1710317527236171 2.0019e-09 deg/d
Q 3.486125383847871 2.7203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      806  
   data-arc span      7711 days (21.11 yr)  
   first obs. used      1998-12-13  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60358  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:15:30  

Additional Information
 Earth MOID = 1.95351 au 
 Jupiter MOID = 1.68284 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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