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JPL Small-Body Database Browser
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136985 (1998 SD12)
Classification: Main-belt Asteroid          SPK-ID: 2136985
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2145452571396835 6.4989e-08  
a 2.547303284530953 1.2732e-08 au
q 2.000791446338499 1.708e-07 au
i 18.72400538496627 6.4239e-06 deg
node 200.536651893931 1.6226e-05 deg
peri 174.9419440861525 2.2535e-05 deg
M 26.81775010520637 1.6841e-05 deg
tp 2458489.878574892778
(2019-Jan-06.37857489)
6.8882e-05 TDB
period 1484.975916412494
4.07
1.1134e-05
3.048e-08
d
yr
n .2424281741011077 1.8176e-09 deg/d
Q 3.093815122723407 1.5464e-08 au
  Orbit Determination Parameters
   # obs. used (total)      640  
   data-arc span      7357 days (20.14 yr)  
   first obs. used      1998-09-22  
   last obs. used      2018-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58496  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 10:35:27  

Additional Information
 Earth MOID = 1.00248 au 
 Jupiter MOID = 2.36852 au 
 T_jup = 3.337 
[ 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 15.8   n/a MPO412867  
diameter diameter 2.263 km 0.621 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.181   0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

136985 (1998 SD12)          Discovered 1998-Sep-22 by ODAS at Caussols
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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