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JPL Small-Body Database Browser
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247 Eukrate
Classification: Main-belt Asteroid          SPK-ID: 2000247
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2450096965677417 4.6829e-08  
a 2.740643845857035 7.7574e-09 au
q 2.069159528783354 1.2887e-07 au
i 24.95242620832824 6.8179e-06 deg
node .06058151629913187 1.065e-05 deg
peri 55.38194333482359 1.6146e-05 deg
M 292.5149151950658 1.1065e-05 deg
tp 2458911.158060305339
5.1242e-05 TDB
period 1657.20917493379
n .2172326857980272 9.2232e-10 deg/d
Q 3.412128162930716 9.6581e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1783  
   data-arc span      49172 days (134.63 yr)  
   first obs. used      1885-03-16  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51025  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:51:20  

Additional Information
 Earth MOID = 1.15489 au 
 Jupiter MOID = 2.34551 au 
 T_jup = 3.174 
[ 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 8.04   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
diameter diameter 130.935 km 0.505 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 12.093 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Schober, H.J.; Surdej, J. (1979) Astron. Astrophys. Suppl. Ser. 38, 269-274.]
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Pilcher, F.; Delos, S.; Ahrendts, G.; Barker, T. (2012) Minor Planet Bull. 39, 204.]
[Garlitz, J. (2013) Posting on CALL web site.]
[Behrend, R. (2015) Observatoire de Geneve web site,]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.064   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.691   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=6.51, mean=10.88, max.=18.92) deg.
U-B UB 0.295   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=6.51, mean=10.01, max.=18.92) deg.
Tholen spectral type spec_T CP   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xc   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

247 Eukrate          Discovered 1885-Mar-14 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1947 TA = 1960 TC = A901 TB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2019-Dec-07 04:24 UT
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