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JPL Small-Body Database Browser
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46950 (1998 SA118)
Classification: Main-belt Asteroid          SPK-ID: 2046950
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1061063577620533 3.8695e-08  
a 2.692819701842394 1.6051e-08 au
q 2.407094411169999 1.0362e-07 au
i 8.635260963652051 5.2847e-06 deg
node 4.607627924558255 2.988e-05 deg
peri 66.88890889993216 3.9499e-05 deg
M 192.8144907125067 2.6352e-05 deg
tp 2459350.058395352960
(2021-May-15.55839535)
0.00012038 TDB
period 1614.021594796503
4.42
1.4431e-05
3.951e-08
d
yr
n .2230453428632032 1.9943e-09 deg/d
Q 2.978544992514788 1.7754e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1202  
   data-arc span      8452 days (23.14 yr)  
   first obs. used      1996-03-17  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49137  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:34:38  

Additional Information
 Earth MOID = 1.43619 au 
 Jupiter MOID = 2.29848 au 
 T_jup = 3.347 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456347.5 (2013-Feb-24.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1077889473647737 3.87e-08  
q 2.399669465093551 1.0397e-07 au
tp 2456120.974171550886
(2012-Jul-12.47417155)
0.00011055 TDB
node 4.736101052252895 2.9811e-05 deg
peri 65.86686591642398 3.9219e-05 deg
i 8.651007561495506 5.2912e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1202  
   data-arc span      8452 days (23.14 yr)  
   first obs. used      1996-03-17  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49137  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:34:38  

Additional Information
 Jupiter MOID = 2.29848 au 
 T_jup = 3.347 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.49766945604143E-15 -3.986970600391382E-15 6.044606502543327E-14 6.378992117024932E-16 1.87475186749694E-15 -2.22046905344782E-15
q -3.986970600391382E-15 1.081062541628875E-14 9.696875154285232E-14 -2.824362465121255E-15 5.850392468634811E-14 6.460406236991058E-15
tp 6.044606502543327E-14 9.696875154285232E-14 1.222193793122477E-8 4.310144514406542E-12 2.836642771854657E-9 -3.170179894153806E-12
node 6.378992117024932E-16 -2.824362465121255E-15 4.310144514406542E-12 8.886685242899833E-10 -8.771034803723736E-10 -2.733065874387764E-11
peri 1.87475186749694E-15 5.850392468634811E-14 2.836642771854657E-9 -8.771034803723736E-10 1.538158507946495E-9 2.630216955350981E-11
i -2.22046905344782E-15 6.460406236991058E-15 -3.170179894153806E-12 -2.733065874387764E-11 2.630216955350981E-11 2.799704542677068E-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 13.6   n/a MPO296485  

46950 (1998 SA118)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1934-Sep-26 19:28 00:04 Iris 0.0390255785920613 0.0390153567957501 0.0390358006604915 3.46384155052006 3.46384150799296 2427707.311051186 4.41952829742535 534.733286651849 34.6658946915268 -17.7593982248924 52370.3677942463 T 22 CATAB v2.0e-lin.ifort 2019-May-30 04:34:43 2019-May-30 04:34
2169-Mar-08 21:06 00:03 Eunom 0.0316925431575041 0.031676163111735 0.0317089348578152 4.14606774213543 4.14606763530366 2513338.379448460 3.44839459862224 1259.37722464092 44.6494778025264 49.6331982346367 80860.9123753985 T 22 CATAB v2.0e-lin.ifort 2019-May-30 04:34:43 2019-May-30 04:34
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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