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46955 (1998 SS121)
Classification: Main-belt Asteroid          SPK-ID: 2046955
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1047748435158632 5.0112e-08  
a 2.723733412548851 1.8323e-08 au
q 2.438354670470117 1.3439e-07 au
i 4.21494936914134 5.479e-06 deg
node 244.9583378078565 6.1866e-05 deg
peri 176.0612288526416 6.5908e-05 deg
M 261.5976476282838 2.4908e-05 deg
tp 2459449.295304392145
(2021-Aug-22.79530439)
0.00011547 TDB
period 1641.894788966562
4.50
1.6568e-05
4.536e-08
d
yr
n .2192588723827977 2.2125e-09 deg/d
Q 3.009112154627585 2.0243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      7611 days (20.84 yr)  
   first obs. used      1998-09-26  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58377  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:38:16  

Additional Information
 Earth MOID = 1.45115 au 
 Jupiter MOID = 2.27708 au 
 T_jup = 3.346 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO279981  
diameter diameter 5.337 km 1.379 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46955 (1998 SS121)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 SS121 = 2000 CA46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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