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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05759216402589832 4.539e-08  
a 3.212543502196966 2.444e-08 au
q 3.027526169878104 1.4404e-07 au
i 12.50596012271568 4.4704e-06 deg
node 49.02632784517021 2.262e-05 deg
peri 297.5226575576801 4.5612e-05 deg
M 152.9005078090679 3.9866e-05 deg
tp 2457707.238985887134
(2016-Nov-14.73898589)
0.00023219 TDB
period 2103.15825426945
5.76
2.4001e-05
6.571e-08
d
yr
n .1711711419096462 1.9534e-09 deg/d
Q 3.397560834515827 2.5848e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1224  
   data-arc span      7173 days (19.64 yr)  
   first obs. used      1999-09-04  
   last obs. used      2019-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55144  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:41:18  

Additional Information
 Earth MOID = 2.04728 au 
 Jupiter MOID = 1.88115 au 
 T_jup = 3.151 
[ 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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