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17397 (1981 EF48)
Classification: Outer Main-belt Asteroid          SPK-ID: 2017397
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02393713793723027 5.4877e-08  
a 3.927573784288129 4.4605e-08 au
q 3.833558908854974 2.2346e-07 au
i 1.722727763482923 6.014e-06 deg
node 221.5095197136428 0.00017033 deg
peri 179.3332663812987 0.00020463 deg
M 156.3546745438041 0.00011106 deg
tp 2457765.709371244473
(2017-Jan-12.20937124)
0.00088031 TDB
period 2843.052998888448
7.78
4.8432e-05
1.326e-07
d
yr
n .1266244421545253 2.1571e-09 deg/d
Q 4.021588659721283 4.5672e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1127  
   data-arc span      15143 days (41.46 yr)  
   first obs. used      1977-10-18  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55845  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:19:09  

Additional Information
 Earth MOID = 2.84085 au 
 Jupiter MOID = 1.12014 au 
 T_jup = 3.061 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456278.5 (2012-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02524187155041388 5.3862e-08  
q 3.833379843737565 2.2057e-07 au
tp 2454941.234685660594
(2009-Apr-19.73468566)
0.00086436 TDB
node 221.5664992167093 0.00017036 deg
peri 182.7544050885339 0.00020283 deg
i 1.721397862742843 6.0136e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1127  
   data-arc span      15143 days (41.46 yr)  
   first obs. used      1977-10-18  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55845  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:19:09  

Additional Information
 Jupiter MOID = 1.12014 au 
 T_jup = 3.061 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.901109918028406E-15 -1.165118636099824E-14 -1.677517997721606E-11 5.766138352980467E-16 -2.177538492498035E-12 -8.550253176123567E-17
q -1.165118636099824E-14 4.865232393759833E-14 5.844626017967428E-11 1.942478331299469E-14 7.711506777527361E-12 1.659057762022304E-15
tp -1.677517997721606E-11 5.844626017967428E-11 7.471113484457517E-7 -1.202899899415603E-10 9.518519025872897E-8 -1.865106757796714E-11
node 5.766138352980467E-16 1.942478331299469E-14 -1.202899899415603E-10 2.902259940051874E-8 -2.902258912099456E-8 -3.544253118746539E-10
peri -2.177538492498035E-12 7.711506777527361E-12 9.518519025872897E-8 -2.902258912099456E-8 4.114164945371592E-8 3.520040962986288E-10
i -8.550253176123567E-17 1.659057762022304E-15 -1.865106757796714E-11 -3.544253118746539E-10 3.520040962986288E-10 3.616292058504132E-11

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 13.1   n/a MPO431699  
diameter diameter 13.225 km 0.379 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
geometric albedo albedo 0.070   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

17397 (1981 EF48)          Discovered 1981-Mar-06 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EF48 = 1977 UQ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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