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JPL Small-Body Database Browser
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17394 (1981 ER42)
Classification: Main-belt Asteroid          SPK-ID: 2017394
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1010486182264821 3.7566e-08  
a 3.078187721340832 1.8075e-08 au
q 2.767141105457617 1.1486e-07 au
i 1.556071355805481 4.415e-06 deg
node 12.310392489884 0.00014591 deg
peri 25.58537844085138 0.00014747 deg
M 154.6509160430313 2.195e-05 deg
tp 2457753.094896677238
(2016-Dec-30.59489668)
0.0001177 TDB
period 1972.609312649079
5.40
1.7374e-05
4.757e-08
d
yr
n .1824993918925308 1.6074e-09 deg/d
Q 3.389234337224047 1.9901e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1279  
   data-arc span      14821 days (40.58 yr)  
   first obs. used      1978-10-03  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55444  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:30:39  

Additional Information
 Earth MOID = 1.77395 au 
 Jupiter MOID = 2.00365 au 
 T_jup = 3.220 
[ 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 14.0   n/a MPO344441  

17394 (1981 ER42)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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