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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1628297226425971 4.47e-08  
a 2.812567059146789 1.4273e-08 au
q 2.354597544992212 1.2796e-07 au
i 11.92761673255592 5.1314e-06 deg
node 215.8973383066214 1.6325e-05 deg
peri 192.6254233370524 1.963e-05 deg
M 275.9751186967493 1.2337e-05 deg
tp 2459798.622304465861
(2022-Aug-07.12230447)
6.075e-05 TDB
period 1722.870980147515
4.72
1.3115e-05
3.591e-08
d
yr
n .2089535456503982 1.5906e-09 deg/d
Q 3.270536573301366 1.6597e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1032  
   data-arc span      8320 days (22.78 yr)  
   first obs. used      1998-09-26  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52309  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:26:55  

Additional Information
 Earth MOID = 1.36509 au 
 Jupiter MOID = 2.13688 au 
 T_jup = 3.270 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457644.5 (2016-Sep-13.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1642635910277267 4.4561e-08  
q 2.347866505137941 1.2733e-07 au
tp 2458080.915054353291
(2017-Nov-23.41505435)
5.4195e-05 TDB
node 215.9843043819754 1.6315e-05 deg
peri 193.188381811474 1.9595e-05 deg
i 11.93685135777974 5.1348e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1032  
   data-arc span      8320 days (22.78 yr)  
   first obs. used      1998-09-26  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52309  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:26:55  

Additional Information
 Jupiter MOID = 2.13688 au 
 T_jup = 3.270 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.985720679199327E-15 -5.649280851946904E-15 -5.495780550010957E-13 5.080917404581725E-15 -9.615276883483362E-14 -1.389258756798994E-15
q -5.649280851946904E-15 1.621253017502666E-14 1.78539330648299E-12 -1.465055628939102E-14 3.076564145561808E-13 4.521563985841877E-15
tp -5.495780550010957E-13 1.78539330648299E-12 2.937045337092873E-9 -5.07435221143721E-12 5.945404517558482E-10 1.400884134355528E-12
node 5.080917404581725E-15 -1.465055628939102E-14 -5.07435221143721E-12 2.661802002258634E-10 -2.611093137603384E-10 5.828480325296501E-12
peri -9.615276883483362E-14 3.076564145561808E-13 5.945404517558482E-10 -2.611093137603384E-10 3.839473157531666E-10 -5.388394225810059E-12
i -1.389258756798994E-15 4.521563985841877E-15 1.400884134355528E-12 5.828480325296501E-12 -5.388394225810059E-12 2.636649663084868E-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 14.61   n/a E2021B10  
rotation period rot_per 291.086 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

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

Alternate Designations
 1998 SL121 = 2000 EY175 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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