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129648 (1998 MB4)
Classification: Main-belt Asteroid          SPK-ID: 2129648
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1526942409877897 8.6835e-08  
a 3.098258701248448 3.6266e-08 au
q 2.625172440477502 2.6116e-07 au
i 11.40198563929273 5.7311e-06 deg
node 116.7349255884154 4.0225e-05 deg
peri 240.5027316420984 4.4582e-05 deg
M 329.426571206617 2.2238e-05 deg
tp 2459169.667367286717
(2020-Nov-16.16736729)
0.00012428 TDB
period 1991.933997157658
5.45
3.4974e-05
9.575e-08
d
yr
n .1807288798291978 3.1732e-09 deg/d
Q 3.571344962019395 4.1803e-08 au
  Orbit Determination Parameters
   # obs. used (total)      355  
   data-arc span      7537 days (20.64 yr)  
   first obs. used      1998-06-18  
   last obs. used      2019-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56472  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:28:06  

Additional Information
 Earth MOID = 1.64252 au 
 Jupiter MOID = 1.9239 au 
 T_jup = 3.175 
[ 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 15.2   n/a MPO432775  

129648 (1998 MB4)          Discovered 1998-Jun-18 by Spacewatch at Kitt Peak
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 MB4 = 2004 SN49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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