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8988 (1979 MA4)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008988
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2131513050776873 3.2628e-08  
a 3.399951985672414 1.7955e-08 au
q 2.675247782724865 1.1432e-07 au
i 4.158165926189481 3.9455e-06 deg
node 187.4898811973668 4.9386e-05 deg
peri 146.5510476263287 5.0059e-05 deg
M 139.8492321344868 9.8528e-06 deg
tp 2458110.960601417497
(2017-Dec-23.46060142)
5.8881e-05 TDB
period 2289.852998132632
6.27
1.8139e-05
4.966e-08
d
yr
n .1572153322914523 1.2454e-09 deg/d
Q 4.124656188619964 2.1783e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2387  
   data-arc span      23528 days (64.42 yr)  
   first obs. used      1955-11-19  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46901  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:05:44  

Additional Information
 Earth MOID = 1.66666 au 
 Jupiter MOID = 1.297 au 
 T_jup = 3.106 
[ 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 12.5   n/a MPO337333  
diameter diameter 15.643 km 0.338 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.087   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8988 (1979 MA4)          Discovered 1979-Jun-25 by Helin, E. F., Bus, S. J. at Siding Spring
Reference: 19980808/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1979 MA4 = 1942 VA = 1986 TJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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