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3655 Eupraksia (1978 SA3)
Classification: Outer Main-belt Asteroid          SPK-ID: 2003655
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2014920669282282 4.604e-08  
a 4.019320856377554 3.3732e-08 au
q 3.209459589378305 1.9027e-07 au
i 3.821501022509372 5.0988e-06 deg
node 338.0198268700277 6.6418e-05 deg
peri 39.52018718065274 6.718e-05 deg
M 66.602572994623 9.8281e-06 deg
tp 2458455.977351427641
(2018-Dec-03.47735143)
7.9497e-05 TDB
period 2943.25195967842
8.06
3.7051e-05
1.014e-07
d
yr
n .1223136873539476 1.5398e-09 deg/d
Q 4.829182123376803 4.0528e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2049  
   data-arc span      24195 days (66.24 yr)  
   first obs. used      1954-08-04  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45961  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:58:25  

Additional Information
 Earth MOID = 2.21254 au 
 Jupiter MOID = .709521 au 
 T_jup = 3.012 
[ 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 11.0   n/a MPO452215  
diameter diameter 36.657 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 75.668 h n/a LCDB (Rev. 2019-August); 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 0.063   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

3655 Eupraksia (1978 SA3)          Discovered 1978-Sep-26 by Zhuravleva, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1978 SA3 = 1979 YW2 = 1981 ED49 = 1982 FZ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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