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17383 (1981 EE12)
Classification: Main-belt Asteroid          SPK-ID: 2017383
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09904949220827036 3.1542e-08  
a 2.300700375953597 8.6191e-09 au
q 2.072817171992016 7.2628e-08 au
i 5.30008157562333 3.9463e-06 deg
node 281.5653768417576 4.2507e-05 deg
peri 146.9592996150246 4.8547e-05 deg
M 185.6340230313387 2.3281e-05 deg
tp 2459617.873194045929
(2022-Feb-07.37319405)
8.3518e-05 TDB
period 1274.642873113256
3.49
7.1627e-06
1.961e-08
d
yr
n .2824320502579021 1.5871e-09 deg/d
Q 2.528583579915177 9.4728e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1381  
   data-arc span      14365 days (39.33 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:08:55  

Additional Information
 Earth MOID = 1.08948 au 
 Jupiter MOID = 2.6921 au 
 T_jup = 3.579 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO381403  
diameter diameter 2.352 km 0.565 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.4 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Binzel, R.P.; Xu, S.; Bus, S.J.; Bowell, E. (1992) Icarus 99, 225-237; Science 257, 779-782.]
geometric albedo albedo 0.231   0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17383 (1981 EE12)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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