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17377 (1981 EF5)
Classification: Main-belt Asteroid          SPK-ID: 2017377
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 .2131408418346309 5.1233e-08  
a 2.596108880575475 1.169e-08 au
q 2.042772048275257 1.3117e-07 au
i 10.45448299863243 6.5033e-06 deg
node 224.1581341712991 1.9799e-05 deg
peri 225.731122217517 2.3649e-05 deg
M 292.2206104173085 1.1012e-05 deg
tp 2459684.158978273740
(2022-Apr-14.65897827)
4.6689e-05 TDB
period 1527.857255961353
4.18
1.032e-05
2.825e-08
d
yr
n .2356241059793783 1.5915e-09 deg/d
Q 3.149445712875693 1.4182e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1053  
   data-arc span      24382 days (66.75 yr)  
   first obs. used      1954-10-06  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52321  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:58:34  

Additional Information
 Earth MOID = 1.07351 au 
 Jupiter MOID = 2.15858 au 
 T_jup = 3.362 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457080.5 (2015-Feb-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2156491136263747 5.2278e-08  
q 2.034658879539459 1.3476e-07 au
tp 2456625.506180318574
(2013-Nov-29.00618032)
4.7778e-05 TDB
node 224.4719216398788 1.9714e-05 deg
peri 224.6844860489648 2.3405e-05 deg
i 10.48189200910525 6.5198e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1053  
   data-arc span      24382 days (66.75 yr)  
   first obs. used      1954-10-06  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52321  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:58:34  

Additional Information
 Jupiter MOID = 2.15858 au 
 T_jup = 3.362 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.733005975487678E-15 -7.030680510318314E-15 -1.48394359151798E-12 1.430578586249095E-14 -4.176905701523484E-13 -9.819556969003259E-15
q -7.030680510318314E-15 1.815971117956998E-14 3.723907678750239E-12 -3.775087232157114E-14 1.058031345730893E-12 2.655123341392861E-14
tp -1.48394359151798E-12 3.723907678750239E-12 2.282742470171215E-9 -8.68564003176247E-12 6.082335255342158E-10 7.017401815058605E-12
node 1.430578586249095E-14 -3.775087232157114E-14 -8.68564003176247E-12 3.886361386605431E-10 -3.839663727737528E-10 2.473099145592308E-11
peri -4.176905701523484E-13 1.058031345730893E-12 6.082335255342158E-10 -3.839663727737528E-10 5.477715987511961E-10 -2.229753560389641E-11
i -9.819556969003259E-15 2.655123341392861E-14 7.017401815058605E-12 2.473099145592308E-11 -2.229753560389641E-11 4.250779108977852E-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 14.7   n/a MPO435861  
diameter diameter 6.420 km 0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.075   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17377 (1981 EF5)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EF5 = 1975 VK3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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