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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 ]

[ show orbit diagram ]
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2020-Apr-06 03:17 < 00:01 David 0.0426194806553604 0.0426181630092271 0.042620798361404 8.08244443529428 8.08244439143797 2458945.637004663 0.482656426614413 174.865228003693 57.2077470753763 78.7300578821955 109506.547374985 T 27 CATAB v2.0f-lin.ifort 2020-Nov-12 21:44:29 2020-Nov-12 21:44
2129-Feb-26 18:24 00:02 Hebe 0.0241002578938815 0.0240950467149465 0.0241054922116321 8.14256921399677 8.14256918231755 2498718.266450177 1.98991112855411 1238.27655508658 60.5627345181713 78.1839199861285 58262.0238485777 T 27 CATAB v2.0f-lin.ifort 2020-Nov-12 21:44:29 2020-Nov-12 21:44

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