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120937 (1998 SD155)
Classification: Main-belt Asteroid          SPK-ID: 2120937
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2174215091994283 4.686e-08  
a 2.241052245308786 8.5983e-09 au
q 1.753799283938982 1.0519e-07 au
i 4.887826142686492 4.7564e-06 deg
node 194.085235604528 4.8437e-05 deg
peri 127.6464132233634 4.9427e-05 deg
M 197.7128160319713 8.6913e-06 deg
tp 2459552.905663392862
(2021-Dec-04.40566339)
2.9946e-05 TDB
period 1225.395831999943
3.35
7.0523e-06
1.931e-08
d
yr
n .293782621581511 1.6908e-09 deg/d
Q 2.728305206678589 1.0468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      720  
   data-arc span      7810 days (21.38 yr)  
   first obs. used      1998-09-15  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54647  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 06:24:38  

Additional Information
 Earth MOID = .746819 au 
 Jupiter MOID = 2.61259 au 
 T_jup = 3.598 
[ 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 16.4   n/a MPO453680  
diameter diameter 2.955 km 0.228 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120937 (1998 SD155)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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