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46954 (1998 SL121)
Classification: Main-belt Asteroid          SPK-ID: 2046954
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1640804503168777 5.5381e-08  
a 2.808732200603525 1.6412e-08 au
q 2.347874156308984 1.5363e-07 au
i 11.9374473587253 6.5964e-06 deg
node 215.9769804659743 1.9615e-05 deg
peri 192.9721600941914 2.4593e-05 deg
M 108.9499949506729 1.3516e-05 deg
tp 2458080.158289311291
(2017-Nov-22.65828931)
6.4008e-05 TDB
period 1719.348550064145
4.71
1.507e-05
4.126e-08
d
yr
n .2093816288655196 1.8352e-09 deg/d
Q 3.269590244898066 1.9105e-08 au
  Orbit Determination Parameters
   # obs. used (total)      871  
   data-arc span      7522 days (20.59 yr)  
   first obs. used      1998-09-26  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54064  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:40:02  

Additional Information
 Earth MOID = 1.35856 au 
 Jupiter MOID = 2.13351 au 
 T_jup = 3.271 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456799.5 (2014-May-22.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1644299782694427 5.5279e-08  
q 2.34738221525098 1.5353e-07 au
tp 2456362.566404713636
(2013-Mar-11.06640471)
6.465e-05 TDB
node 216.0002520161197 1.9617e-05 deg
peri 193.407086650167 2.4604e-05 deg
i 11.93628901487203 6.596e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      871  
   data-arc span      7522 days (20.59 yr)  
   first obs. used      1998-09-26  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54064  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:40:02  

Additional Information
 Jupiter MOID = 2.13351 au 
 T_jup = 3.271 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.055721554387299E-15 -8.454339521721684E-15 -1.377441361766204E-12 1.408572560498627E-14 -3.397917992773884E-13 -2.035906736620238E-15
q -8.454339521721684E-15 2.357283196064639E-14 3.724207057541779E-12 -4.080193614702762E-14 9.325964284441679E-13 6.300962833707145E-15
tp -1.377441361766204E-12 3.724207057541779E-12 4.179571322820488E-9 -1.005795326749536E-11 9.688551868657283E-10 -2.530405736593567E-12
node 1.408572560498627E-14 -4.080193614702762E-14 -1.005795326749536E-11 3.848358115956566E-10 -3.78560500713779E-10 -1.681818776349167E-11
peri -3.397917992773884E-13 9.325964284441679E-13 9.688551868657283E-10 -3.78560500713779E-10 6.053809168232562E-10 1.601535250020151E-11
i -2.035906736620238E-15 6.300962833707145E-15 -2.530405736593567E-12 -1.681818776349167E-11 1.601535250020151E-11 4.350736710764098E-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 14.6   n/a MPO436110  

46954 (1998 SL121)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 SL121 = 2000 EY175 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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