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101218 (1998 SR54)
Classification: Main-belt Asteroid          SPK-ID: 2101218
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1725521232832774 4.0033e-08  
a 2.641390152887384 1.5483e-08 au
q 2.185612673587126 1.0463e-07 au
i 12.18037320569996 5.848e-06 deg
node 187.9951795408298 2.0351e-05 deg
peri 92.55033409950396 2.7188e-05 deg
M 78.56390286449668 1.9052e-05 deg
tp 2458658.309610744472
(2019-Jun-23.80961074)
8.1492e-05 TDB
period 1568.004333293622
4.29
1.3787e-05
3.775e-08
d
yr
n .2295912022410125 2.0187e-09 deg/d
Q 3.097167632187643 1.8155e-08 au
  Orbit Determination Parameters
   # obs. used (total)      670  
   data-arc span      8070 days (22.09 yr)  
   first obs. used      1998-09-16  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61879  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:01:47  

Additional Information
 Earth MOID = 1.21104 au 
 Jupiter MOID = 2.15539 au 
 T_jup = 3.342 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO436472  
diameter diameter 2.076 km 0.315 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.341   0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101218 (1998 SR54)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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