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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2016691657092202 2.4424e-08  
a 4.019681803196042 3.0489e-08 au
q 3.209035927528963 1.0239e-07 au
i 3.821835425542198 9.5892e-07 deg
node 338.0154910497434 1.0425e-05 deg
peri 39.53835628718553 1.163e-05 deg
M 91.02862669946008 6.8686e-06 deg
tp 2458456.177014557119
(2018-Dec-03.67701456)
5.4288e-05 TDB
period 2943.648437585695
8.06
3.3491e-05
9.169e-08
d
yr
n .1222972130106891 1.3914e-09 deg/d
Q 4.830327678863123 3.6638e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2343  
   data-arc span      24330 days (66.61 yr)  
   first obs. used      1954-08-04  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44268  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:23:01  

Additional Information
 Earth MOID = 2.21075 au 
 Jupiter MOID = .70956 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 11.05   n/a E2021B10  
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. 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 0.063   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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