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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2016691655127611 2.4374e-08  
a 4.019681803389928 3.0453e-08 au
q 3.20903592847345 1.0212e-07 au
i 3.821835427118786 9.5875e-07 deg
node 338.015491057002 1.0423e-05 deg
peri 39.53835627703829 1.1628e-05 deg
M 91.02862667437451 6.8659e-06 deg
tp 2458456.177014708386
(2018-Dec-03.67701471)
5.4276e-05 TDB
period 2943.648437798672
8.06
3.3452e-05
9.159e-08
d
yr
n .1222972130018408 1.3898e-09 deg/d
Q 4.830327678306406 3.6595e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2360  
   data-arc span      24337 days (66.63 yr)  
   first obs. used      1954-08-04  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44131  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:08:23  

Additional Information
 Earth MOID = 2.21075 au 
 Jupiter MOID = .70956 au 
 T_jup = 3.012 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457166.5 (2015-May-24.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2003739616056294 2.442e-08  
q 3.208571676984766 1.0191e-07 au
tp 2458457.688587677196
(2018-Dec-05.18858768)
5.4427e-05 TDB
node 338.0602855289793 1.0424e-05 deg
peri 39.75112541774011 1.1633e-05 deg
i 3.822834172702015 9.5921e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2360  
   data-arc span      24337 days (66.63 yr)  
   first obs. used      1954-08-04  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44131  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:08:23  

Additional Information
 Jupiter MOID = .70956 au 
 T_jup = 3.012 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.963221000537791E-16 -2.418159598486267E-15 6.134737614332803E-14 -2.199878242697345E-14 4.697710416675404E-14 -5.659300724459757E-15
q -2.418159598486267E-15 1.038563886353439E-14 -5.988468725156469E-14 8.4485113773734E-14 -1.98513939962009E-13 2.154299628260187E-14
tp 6.134737614332803E-14 -5.988468725156469E-14 2.96227673152616E-9 -2.786114169148288E-11 2.856425127718116E-10 -5.270882891991567E-12
node -2.199878242697345E-14 8.4485113773734E-14 -2.786114169148288E-11 1.08654148759989E-10 -1.093493145296025E-10 8.66949900876148E-12
peri 4.697710416675404E-14 -1.98513939962009E-13 2.856425127718116E-10 -1.093493145296025E-10 1.353231234896321E-10 -9.086060360212123E-12
i -5.659300724459757E-15 2.154299628260187E-14 -5.270882891991567E-12 8.66949900876148E-12 -9.086060360212123E-12 9.200816063146346E-13

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 11.06   n/a MPCxxxxx  
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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