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120444 (1981 EQ13)
Classification: Main-belt Asteroid          SPK-ID: 2120444
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2324057130972572 4.6215e-08  
a 2.631648887920384 1.3069e-08 au
q 2.020038651501643 1.2143e-07 au
i 12.41673612675694 6.0766e-06 deg
node 337.2336062079071 1.9487e-05 deg
peri 203.3328328920545 2.2784e-05 deg
M 117.2596367289612 1.1549e-05 deg
tp 2458692.590438034395
(2019-Jul-28.09043803)
4.8578e-05 TDB
period 1559.33829754444
4.27
1.1616e-05
3.18e-08
d
yr
n .2308671572851819 1.7198e-09 deg/d
Q 3.243259124339124 1.6106e-08 au
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      14422 days (39.49 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-08-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52516  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:07  

Additional Information
 Earth MOID = 1.03012 au 
 Jupiter MOID = 1.76172 au 
 T_jup = 3.328 
[ 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 15.39   n/a E2021B55  
diameter diameter 4.838 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.075   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120444 (1981 EQ13)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1981 EQ13 = 1998 FE98 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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