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37554 (1981 ET44)
Classification: Main-belt Asteroid          SPK-ID: 2037554
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1488066338816263 4.4216e-08  
a 2.313828229206379 9.4703e-09 au
q 1.969515239037893 1.0302e-07 au
i 5.531237548888249 4.4719e-06 deg
node 287.7685856950811 4.2093e-05 deg
peri 15.34609000455493 4.3815e-05 deg
M 297.6921287705549 1.2581e-05 deg
tp 2459223.002816450576
(2021-Jan-08.50281645)
4.5264e-05 TDB
period 1285.568136764618
3.52
7.8926e-06
2.161e-08
d
yr
n .2800318316118272 1.7192e-09 deg/d
Q 2.658141219374864 1.088e-08 au
  Orbit Determination Parameters
   # obs. used (total)      780  
   data-arc span      14208 days (38.90 yr)  
   first obs. used      1981-03-07  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54359  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 04:34:03  

Additional Information
 Earth MOID = .954706 au 
 Jupiter MOID = 2.55352 au 
 T_jup = 3.562 
[ 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 MPO365694  
diameter diameter 1.415 km 0.329 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.320   0.166 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

37554 (1981 ET44)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 ET44 = 1999 JH128 = 2000 WO78 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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