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JPL Small-Body Database Browser
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46554 (1990 SZ8)
Classification: Main-belt Asteroid          SPK-ID: 2046554
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1509037145424635 5.2142e-08  
a 2.969424816089912 2.263e-08 au
q 2.521327581287373 1.5024e-07 au
i 8.204179606767397 5.6822e-06 deg
node 32.93672453578546 3.0189e-05 deg
peri 289.7498369030626 3.7715e-05 deg
M 234.7152166275106 2.7278e-05 deg
tp 2459250.933278234603
(2021-Feb-05.43327823)
0.0001454 TDB
period 1868.989783605868
5.12
2.1365e-05
5.849e-08
d
yr
n .1926174252838595 2.2019e-09 deg/d
Q 3.417522050892451 2.6045e-08 au
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      10456 days (28.63 yr)  
   first obs. used      1990-09-14  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52034  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:38:12  

Additional Information
 Earth MOID = 1.52351 au 
 Jupiter MOID = 1.97935 au 
 T_jup = 3.231 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456687.5 (2014-Jan-30.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1500407682651941 5.2308e-08  
q 2.524229219103231 1.5063e-07 au
tp 2457383.447875250836
(2015-Dec-26.94787525)
0.00013565 TDB
node 32.9528509611362 3.018e-05 deg
peri 290.1859852348232 3.7743e-05 deg
i 8.204819491846775 5.6823e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      10456 days (28.63 yr)  
   first obs. used      1990-09-14  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52034  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:38:12  

Additional Information
 Jupiter MOID = 1.97935 au 
 T_jup = 3.231 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.73614683474341E-15 -7.820204041895404E-15 4.043854893829011E-12 9.754517591133933E-15 5.949844888446407E-13 1.950666417128013E-15
q -7.820204041895404E-15 2.26880316507351E-14 -1.096219173734169E-11 -2.920651061754211E-14 -1.617567784762104E-12 -4.657356715904224E-15
tp 4.043854893829011E-12 -1.096219173734169E-11 1.840116719817466E-8 3.180726820149909E-11 3.078461001414602E-9 1.254269515144696E-13
node 9.754517591133933E-15 -2.920651061754211E-14 3.180726820149909E-11 9.108140333442724E-10 -8.959964069324178E-10 -8.883166621634043E-12
peri 5.949844888446407E-13 -1.617567784762104E-12 3.078461001414602E-9 -8.959964069324178E-10 1.424535339990962E-9 8.698034350404969E-12
i 1.950666417128013E-15 -4.657356715904224E-15 1.254269515144696E-13 -8.883166621634043E-12 8.698034350404969E-12 3.22889832647001E-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 14.3   n/a MPO436107  
diameter diameter 3.764 km 0.469 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.286   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46554 (1990 SZ8)          Discovered 1990-Sep-22 by Elst, E. W. at La Silla
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 SZ8 = 2001 YY121 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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