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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .217554325280291 4.6859e-08  
a 2.240704024707106 8.5685e-09 au
q 1.753229172459119 1.0516e-07 au
i 4.888471668481611 4.7276e-06 deg
node 194.0817454067017 4.8404e-05 deg
peri 127.6826122910818 4.9363e-05 deg
M 256.4406445881376 8.6505e-06 deg
tp 2459552.921184084874
(2021-Dec-04.42118408)
2.973e-05 TDB
period 1225.110235246037
3.35
7.0273e-06
1.924e-08
d
yr
n .2938511079598497 1.6855e-09 deg/d
Q 2.728178876955093 1.0433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      728  
   data-arc span      7833 days (21.45 yr)  
   first obs. used      1998-09-15  
   last obs. used      2020-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54532  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:53:39  

Additional Information
 Earth MOID = .744319 au 
 Jupiter MOID = 2.61275 au 
 T_jup = 3.599 
[ 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 16.49   n/a E2021B55  
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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