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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2147451294401604 5.4209e-08  
a 2.547069654719436 1.1219e-08 au
q 2.000098852023606 1.4121e-07 au
i 18.72444701913806 5.3553e-06 deg
node 200.5243095415601 1.5872e-05 deg
peri 174.9151321436975 2.1898e-05 deg
M 123.8114353379555 1.6206e-05 deg
tp 2458489.856371819487
(2019-Jan-06.35637182)
6.4571e-05 TDB
period 1484.771625845367
4.07
9.8103e-06
2.686e-08
d
yr
n .2424615299305919 1.602e-09 deg/d
Q 3.094040457415266 1.3629e-08 au
  Orbit Determination Parameters
   # obs. used (total)      679  
   data-arc span      7879 days (21.57 yr)  
   first obs. used      1998-09-22  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5778  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 22:42:24  

Additional Information
 Earth MOID = 1.00256 au 
 Jupiter MOID = 2.37139 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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