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17395 (1981 EA44)
Classification: Main-belt Asteroid          SPK-ID: 2017395
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1847411738841905 4.7321e-08  
a 2.656170255709255 1.2541e-08 au
q 2.165466244633256 1.2793e-07 au
i 13.0235357596567 5.4068e-06 deg
node 180.9350270731721 1.4562e-05 deg
peri 162.7080803944847 1.7294e-05 deg
M 265.6549633929794 9.4483e-06 deg
tp 2459614.880058178906
(2022-Feb-04.38005818)
4.252e-05 TDB
period 1581.183560994085
4.33
1.1198e-05
3.066e-08
d
yr
n .2276775504633182 1.6125e-09 deg/d
Q 3.146874266785253 1.4858e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1278  
   data-arc span      14611 days (40.00 yr)  
   first obs. used      1981-03-06  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52042  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:02:29  

Additional Information
 Earth MOID = 1.16044 au 
 Jupiter MOID = 2.30967 au 
 T_jup = 3.327 
[ 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 14.46   n/a E2021B10  
diameter diameter 4.535 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.522 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.197   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17395 (1981 EA44)          Discovered 1981-Mar-06 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1981 EA44 = 1991 RN34 = 1999 JL96 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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