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74241 (1998 SM54)
Classification: Main-belt Asteroid          SPK-ID: 2074241
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08305056173589184 7.6165e-08  
a 2.530026658339697 1.0836e-08 au
q 2.319906523157804 1.9239e-07 au
i 12.57750584982995 5.4468e-06 deg
node 348.2664773234603 1.5723e-05 deg
peri 6.377273920667598 4.1506e-05 deg
M 144.8611932638974 3.4987e-05 deg
tp 2458409.026038658472
(2018-Oct-17.52603866)
0.00014201 TDB
period 1469.894188259575
4.02
9.4434e-06
2.585e-08
d
yr
n .2449155883977316 1.5735e-09 deg/d
Q 2.74014679352159 1.1736e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1115  
   data-arc span      7910 days (21.66 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54778  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:44:26  

Additional Information
 Earth MOID = 1.31478 au 
 Jupiter MOID = 2.64938 au 
 T_jup = 3.413 
[ 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 14.9   n/a MPO453155  
diameter diameter 3.455 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.214   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74241 (1998 SM54)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 SM54 = 2002 PX59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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