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101231 (1998 SZ74)
Classification: Main-belt Asteroid          SPK-ID: 2101231
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 .2039515068790254 3.6499e-08  
a 2.662221412888847 1.2019e-08 au
q 2.119257344084558 9.9852e-08 au
i 3.446971042117704 4.3027e-06 deg
node 119.8750408703564 6.1113e-05 deg
peri 201.9480841851556 6.2135e-05 deg
M 34.64609074612012 1.0144e-05 deg
tp 2458847.807950986797
(2019-Dec-30.30795099)
4.4333e-05 TDB
period 1586.589899782811
4.34
1.0744e-05
2.942e-08
d
yr
n .2269017343733755 1.5366e-09 deg/d
Q 3.205185481693135 1.447e-08 au
  Orbit Determination Parameters
   # obs. used (total)      711  
   data-arc span      8603 days (23.55 yr)  
   first obs. used      1997-04-06  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50831  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:01:43  

Additional Information
 Earth MOID = 1.10709 au 
 Jupiter MOID = 2.11979 au 
 T_jup = 3.352 
[ 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 15.7   n/a MPO436472  
diameter diameter 4.041 km 0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101231 (1998 SZ74)          Discovered 1998-Sep-21 by Elst, E. W. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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