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101184 (1998 SP12)
Classification: Main-belt Asteroid          SPK-ID: 2101184
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1942346041608202 4.136e-08  
a 2.312898418959814 1.0378e-08 au
q 1.863653510088967 9.9023e-08 au
i 24.79936339585572 6.6919e-06 deg
node 289.4543853904731 1.3759e-05 deg
peri 120.4412708759447 5.1731e-05 deg
M 84.62848272661807 3.9766e-05 deg
tp 2458898.471921547213
(2020-Feb-18.97192155)
0.00014171 TDB
period 1284.793307641382
3.52
8.6471e-06
2.367e-08
d
yr
n .2802007123316095 1.8859e-09 deg/d
Q 2.76214332783066 1.2393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1180  
   data-arc span      9687 days (26.52 yr)  
   first obs. used      1994-07-11  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43961  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:27:27  

Additional Information
 Earth MOID = .963775 au 
 Jupiter MOID = 2.66679 au 
 T_jup = 3.437 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457638.5 (2016-Sep-07.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .194112494256416 4.1653e-08  
q 1.86397375470544 9.9734e-08 au
tp 2457612.260511666401
(2016-Aug-11.76051167)
0.00014101 TDB
node 289.5366318911737 1.3768e-05 deg
peri 120.0522657865328 5.1765e-05 deg
i 24.77991643036598 6.6898e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1180  
   data-arc span      9687 days (26.52 yr)  
   first obs. used      1994-07-11  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43961  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:27:27  

Additional Information
 Jupiter MOID = 2.66679 au 
 T_jup = 3.437 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.734984933332312E-15 -4.141596341711821E-15 -1.215792992674911E-12 7.562978486195259E-15 -4.206034403229845E-13 -2.710532070421534E-14
q -4.141596341711821E-15 9.946882861911595E-15 2.936959244070201E-12 -1.702182580008094E-14 1.013479933536791E-12 6.750047844616769E-14
tp -1.215792992674911E-12 2.936959244070201E-12 1.988241006187788E-8 -6.155004771559735E-11 7.060310509966897E-9 2.4948813049618E-10
node 7.562978486195259E-15 -1.702182580008094E-14 -6.155004771559735E-11 1.895477407184304E-10 -1.932592262903623E-10 2.916415578214591E-11
peri -4.206034403229845E-13 1.013479933536791E-12 7.060310509966897E-9 -1.932592262903623E-10 2.679602487636863E-9 6.009009117533321E-11
i -2.710532070421534E-14 6.750047844616769E-14 2.4948813049618E-10 2.916415578214591E-11 6.009009117533321E-11 4.475321904350673E-11

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 14.98   n/a E2021B55  
diameter diameter 6.313 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101184 (1998 SP12)          Discovered 1998-Sep-21 by CSS at Catalina
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Alternate Designations
 1998 SP12 = 1994 NW3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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