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JPL Small-Body Database Browser
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136995 (1998 SD57)
Classification: Main-belt Asteroid          SPK-ID: 2136995
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1893396201354376 6.0511e-08  
a 2.461764138817168 1.7691e-08 au
q 1.995654651910483 1.5527e-07 au
i 2.211418193073346 6.1463e-06 deg
node 127.5030666750852 0.00015337 deg
peri 183.0058168409763 0.00015423 deg
M 153.3922297588959 1.9078e-05 deg
tp 2457999.369244816171
(2017-Sep-02.86924482)
7.294e-05 TDB
period 1410.808567072335
3.86
1.5208e-05
4.164e-08
d
yr
n .2551728196172359 2.7507e-09 deg/d
Q 2.927873625723853 2.1041e-08 au
  Orbit Determination Parameters
   # obs. used (total)      258  
   data-arc span      6864 days (18.79 yr)  
   first obs. used      1998-09-17  
   last obs. used      2017-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60331  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Jul-11 14:41:29  

Additional Information
 Earth MOID = .980412 au 
 Jupiter MOID = 2.3364 au 
 T_jup = 3.463 
[ 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 MPO412867  

136995 (1998 SD57)          Discovered 1998-Sep-17 by LONEOS at Anderson Mesa
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1998 SD57 = 2002 TC4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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