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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .163336924706135 5.1408e-08  
a 2.81054796875054 1.4944e-08 au
q 2.351481706795753 1.4451e-07 au
i 11.93125862327949 6.1246e-06 deg
node 215.9568662531621 1.6331e-05 deg
peri 192.7968113543306 1.9669e-05 deg
M 234.7910304299973 1.2193e-05 deg
tp 2459799.074030131944
(2022-Aug-07.57403013)
6.0858e-05 TDB
period 1721.016086846911
4.71
1.3726e-05
3.758e-08
d
yr
n .2091787536161613 1.6683e-09 deg/d
Q 3.269614230705328 1.7385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      977  
   data-arc span      8017 days (21.95 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52605  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:54:10  

Additional Information
 Earth MOID = 1.36169 au 
 Jupiter MOID = 2.13632 au 
 T_jup = 3.270 
[ show covariance matrix ]

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 14.61   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

[ 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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