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129649 (1998 MM4)
Classification: Main-belt Asteroid          SPK-ID: 2129649
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 .2651410775922114 4.2898e-08  
a 2.59292879080202 1.0494e-08 au
q 1.905436857088903 1.0911e-07 au
i 11.11883834334092 5.8036e-06 deg
node 167.9605434591706 2.4865e-05 deg
peri 92.47097021926007 2.7688e-05 deg
M 96.51531685369557 1.1115e-05 deg
tp 2458591.636773186176
(2019-Apr-18.13677319)
4.6546e-05 TDB
period 1525.050804900721
4.18
9.2581e-06
2.535e-08
d
yr
n .2360577095813117 1.433e-09 deg/d
Q 3.280420724515138 1.3276e-08 au
  Orbit Determination Parameters
   # obs. used (total)      507  
   data-arc span      10585 days (28.98 yr)  
   first obs. used      1990-09-11  
   last obs. used      2019-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55073  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:24:19  

Additional Information
 Earth MOID = .929784 au 
 Jupiter MOID = 1.93826 au 
 T_jup = 3.343 
[ 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 15.9   n/a MPO493742  
diameter diameter 3.801 km 0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.066   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129649 (1998 MM4)          Discovered 1998-Jun-18 by Lopez, A., Pacheco, R. at Mallorca
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 MM4 = 2002 GC68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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