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JPL Small-Body Database Browser
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59991 (1999 SP18)
Classification: Outer Main-belt Asteroid          SPK-ID: 2059991
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05801600769542101 4.4496e-08  
a 3.211332887066786 2.3819e-08 au
q 3.025024173578161 1.4199e-07 au
i 12.50692200769571 4.3955e-06 deg
node 49.018921537669 2.2261e-05 deg
peri 297.44533870802 4.4211e-05 deg
M 221.4891112167265 3.8897e-05 deg
tp 2459809.237967949314
(2022-Aug-17.73796795)
0.00022873 TDB
period 2101.969534808962
5.75
2.3386e-05
6.403e-08
d
yr
n .1712679437253208 1.9054e-09 deg/d
Q 3.397641600555412 2.52e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1252  
   data-arc span      7456 days (20.41 yr)  
   first obs. used      1999-09-04  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54686  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:58:42  

Additional Information
 Earth MOID = 2.04568 au 
 Jupiter MOID = 1.88264 au 
 T_jup = 3.152 
[ 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 13.4   n/a MPO337729  
diameter diameter 8.712 km 0.404 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.122   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59991 (1999 SP18)          Discovered 1999-Sep-30 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 SP18 = 2000 QG218 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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