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101212 (1998 SK51)
Classification: Main-belt Asteroid          SPK-ID: 2101212
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .19597108581545 4.8752e-08  
a 2.626196907596262 1.0937e-08 au
q 2.111538248049445 1.2918e-07 au
i 12.25562824882997 5.7311e-06 deg
node 13.64266944594078 1.7952e-05 deg
peri 340.6080633476611 2.1316e-05 deg
M 51.06611747357957 9.8259e-06 deg
tp 2458779.994363896593
(2019-Oct-23.49436390)
4.2239e-05 TDB
period 1554.495092333916
4.26
9.7111e-06
2.659e-08
d
yr
n .2315864500154173 1.4467e-09 deg/d
Q 3.140855567143078 1.3081e-08 au
  Orbit Determination Parameters
   # obs. used (total)      664  
   data-arc span      8088 days (22.14 yr)  
   first obs. used      1998-09-13  
   last obs. used      2020-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57875  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 04:28:28  

Additional Information
 Earth MOID = 1.11172 au 
 Jupiter MOID = 2.31644 au 
 T_jup = 3.343 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457411.5 (2016-Jan-24.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1982483238638524 4.8991e-08  
q 2.104378061992317 1.3014e-07 au
tp 2457224.790272689820
(2015-Jul-21.29027269)
4.1058e-05 TDB
node 13.70843122134205 1.7912e-05 deg
peri 340.3506619854084 2.1169e-05 deg
i 12.27685047057074 5.7393e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      664  
   data-arc span      8088 days (22.14 yr)  
   first obs. used      1998-09-13  
   last obs. used      2020-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57875  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 04:28:28  

Additional Information
 Jupiter MOID = 2.31644 au 
 T_jup = 3.343 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.400150916887731E-15 -6.361362609012935E-15 2.177934803128785E-13 -1.512468553080056E-14 4.835428547568955E-14 -5.373495061264076E-15
q -6.361362609012935E-15 1.693630886899832E-14 -6.134281585157731E-13 3.903034150064318E-14 -1.362436033659364E-13 1.454065209949435E-14
tp 2.177934803128785E-13 -6.134281585157731E-13 1.685762469435143E-9 -8.48475351947662E-12 4.734253680144125E-10 -1.55511668653484E-13
node -1.512468553080056E-14 3.903034150064318E-14 -8.48475351947662E-12 3.208569438983721E-10 -3.148176621452192E-10 -1.706280611665483E-11
peri 4.835428547568955E-14 -1.362436033659364E-13 4.734253680144125E-10 -3.148176621452192E-10 4.481280840069627E-10 1.672642979445743E-11
i -5.373495061264076E-15 1.454065209949435E-14 -1.55511668653484E-13 -1.706280611665483E-11 1.672642979445743E-11 3.293921309710612E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO493568  

101212 (1998 SK51)          Discovered 1998-Sep-27 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 SK51 = 2002 SJ56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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