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74408 (1998 YX21)
Classification: Main-belt Asteroid          SPK-ID: 2074408
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936277434088821 5.1459e-08  
a 3.111729488515768 2.0197e-08 au
q 2.509212329555585 1.5589e-07 au
i 14.18387483385671 4.6522e-06 deg
node 300.7163435937404 2.174e-05 deg
peri 55.66874230662654 2.5606e-05 deg
M 71.2628705912248 1.2872e-05 deg
tp 2458603.617461471780
(2019-Apr-30.11746147)
7.152e-05 TDB
period 2004.939075352838
5.49
1.952e-05
5.344e-08
d
yr
n .1795565782649259 1.7482e-09 deg/d
Q 3.714246647475952 2.4108e-08 au
  Orbit Determination Parameters
   # obs. used (total)      963  
   data-arc span      14423 days (39.49 yr)  
   first obs. used      1980-08-03  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47211  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:15:31  

Additional Information
 Earth MOID = 1.53421 au 
 Jupiter MOID = 1.84876 au 
 T_jup = 3.143 
[ 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 13.9   n/a MPO453157  
diameter diameter 5.418 km 1.295 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.126   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74408 (1998 YX21)          Discovered 1998-Dec-26 by Spacewatch at Kitt Peak
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 YX21 = 1980 PR3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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