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43744 (1981 EX17)
Classification: Main-belt Asteroid          SPK-ID: 2043744
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1414098673877756 3.4724e-08  
a 2.341911808561171 9.46e-09 au
q 2.01074237027867 8.0132e-08 au
i 2.639024120461413 4.1854e-06 deg
node 352.7470533217299 7.952e-05 deg
peri 217.10192909 8.0861e-05 deg
M 61.43046696345684 1.4348e-05 deg
tp 2459173.124494989789
(2020-Nov-19.62449499)
5.1865e-05 TDB
period 1309.043961061089
3.58
7.9317e-06
2.172e-08
d
yr
n .2750098627002488 1.6663e-09 deg/d
Q 2.673081246843672 1.0798e-08 au
  Orbit Determination Parameters
   # obs. used (total)      673  
   data-arc span      14765 days (40.42 yr)  
   first obs. used      1981-02-02  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51149  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:19:52  

Additional Information
 Earth MOID = 1.00693 au 
 Jupiter MOID = 2.29204 au 
 T_jup = 3.549 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457050.5 (2015-Jan-28.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1417156852698038 3.4683e-08  
q 2.00992840329164 8.0111e-08 au
tp 2456555.400750720835
(2013-Sep-19.90075072)
5.0701e-05 TDB
node 352.7828167566034 7.9467e-05 deg
peri 217.05611309029 8.0806e-05 deg
i 2.640522645680994 4.1862e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      673  
   data-arc span      14765 days (40.42 yr)  
   first obs. used      1981-02-02  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51149  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:19:52  

Additional Information
 Jupiter MOID = 2.29204 au 
 T_jup = 3.549 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.202906730757931E-15 -2.76439410784605E-15 -2.754487707846994E-13 5.968719454305133E-15 -8.939678722183178E-14 -1.768130984426561E-16
q -2.76439410784605E-15 6.417821497804763E-15 6.070999869845428E-13 -1.402995240167346E-14 2.036376193326949E-13 4.757818342371725E-16
tp -2.754487707846994E-13 6.070999869845428E-13 2.570557354128492E-9 -9.064611634387979E-12 7.525136421765638E-10 -1.978240991947983E-13
node 5.968719454305133E-15 -1.402995240167346E-14 -9.064611634387979E-12 6.314963738048429E-9 -6.310543099241645E-9 -2.344396141338276E-11
peri -8.939678722183178E-14 2.036376193326949E-13 7.525136421765638E-10 -6.310543099241645E-9 6.529543318160671E-9 2.338693617107983E-11
i -1.768130984426561E-16 4.757818342371725E-16 -1.978240991947983E-13 -2.344396141338276E-11 2.338693617107983E-11 1.752411244797103E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.33   n/a E2021B10  
diameter diameter 3.398 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43744 (1981 EX17)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EX17 = 2001 YC63 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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