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233970 (1981 ES44)
Classification: Main-belt Asteroid          SPK-ID: 2233970
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1354188005906344 3.3386e-08  
a 2.578883580359429 2.0383e-08 au
q 2.229654259044275 8.4374e-08 au
i 11.88640221674129 1.059e-05 deg
node 330.7744713397267 1.9438e-05 deg
peri 258.5704872742079 5.6089e-05 deg
M 125.9689130615699 4.7526e-05 deg
tp 2458471.193882187395
(2018-Dec-18.69388219)
0.0002005 TDB
period 1512.676403895002
4.14
1.7934e-05
4.91e-08
d
yr
n .2379887721346306 2.8215e-09 deg/d
Q 2.928112901674583 2.3143e-08 au
  Orbit Determination Parameters
   # obs. used (total)      310  
   data-arc span      14137 days (38.70 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54797  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 01:38:33  

Additional Information
 Earth MOID = 1.25723 au 
 Jupiter MOID = 2.19178 au 
 T_jup = 3.383 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO494291  
diameter diameter 1.774 km 0.332 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.170   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

233970 (1981 ES44)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20100330/Numbers.arcLast Updated: 2010-04-05

Alternate Designations
 1981 ES44 = 2007 QN13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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