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101219 (1998 SM55)
Classification: Main-belt Asteroid          SPK-ID: 2101219
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173488177891272 4.7099e-08  
a 2.775869350738192 1.5446e-08 au
q 2.294288835014394 1.3299e-07 au
i 3.171198662216268 5.6271e-06 deg
node 2.722244394361987 8.1171e-05 deg
peri 35.96885328902718 8.2406e-05 deg
M 264.6473717627052 1.6935e-05 deg
tp 2459647.932088154123
(2022-Mar-09.43208815)
8.2027e-05 TDB
period 1689.261792917036
4.62
1.41e-05
3.86e-08
d
yr
n .2131108401962659 1.7788e-09 deg/d
Q 3.257449866461989 1.8126e-08 au
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      7974 days (21.83 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59367  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:46  

Additional Information
 Earth MOID = 1.30171 au 
 Jupiter MOID = 2.17444 au 
 T_jup = 3.311 
[ 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 15.25   n/a E2021B55  
diameter diameter 5.140 km 0.250 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)  

101219 (1998 SM55)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 SM55 = 2000 CQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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