Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
247 Eukrate (A885 EB)
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2452304836979342 4.613e-08  
a 2.741242273974196 7.5432e-09 au
q 2.069006105194279 1.2711e-07 au
i 24.95110908196228 6.6736e-06 deg
node .05680417330341347 1.0471e-05 deg
peri 55.38107250215689 1.6027e-05 deg
M 19.4087170102262 1.0876e-05 deg
tp 2458911.125446550131
(2020-Mar-02.62544655)
5.0003e-05 TDB
period 1657.751989737406
4.54
6.8426e-06
1.873e-08
d
yr
n .217161555062905 8.9636e-10 deg/d
Q 3.413478442754114 9.393e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1965  
   data-arc span      49553 days (135.67 yr)  
   first obs. used      1885-03-16  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48811  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:05  

Additional Information
 Earth MOID = 1.15536 au 
 Jupiter MOID = 2.34748 au 
 T_jup = 3.174 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455811.5 (2011-Sep-07.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2430716382661109 4.5972e-08  
q 2.074628269952476 1.2647e-07 au
tp 2455590.422594477501
(2011-Jan-28.92259448)
4.9733e-05 TDB
node .1992607135190161 1.0435e-05 deg
peri 54.64422114970334 1.6203e-05 deg
i 24.99892170537071 6.6783e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1965  
   data-arc span      49553 days (135.67 yr)  
   first obs. used      1885-03-16  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48811  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:52:05  

Additional Information
 Jupiter MOID = 2.34748 au 
 T_jup = 3.174 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.11337942897831E-15 -5.808391996983507E-15 -8.906147761103382E-13 2.85874451001744E-15 -2.455431054300056E-13 -8.906996443620843E-15
q -5.808391996983507E-15 1.599539877769236E-14 2.441609814631005E-12 -8.13048928793349E-15 6.745791190417789E-13 2.428836563689446E-14
tp -8.906147761103382E-13 2.441609814631005E-12 2.47338293245681E-9 -1.095865821096167E-11 6.295927304994243E-10 2.086166630915975E-12
node 2.85874451001744E-15 -8.13048928793349E-15 -1.095865821096167E-11 1.088977524669452E-10 -1.007159925649577E-10 8.50298339059362E-12
peri -2.455431054300056E-13 6.745791190417789E-13 6.295927304994243E-10 -1.007159925649577E-10 2.625317316791628E-10 -7.532441132631286E-12
i -8.906996443620843E-15 2.428836563689446E-14 2.086166630915975E-12 8.50298339059362E-12 -7.532441132631286E-12 4.459926944590389E-11

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 8.2   n/a MPO492751 IRAS observations used: 17
diameter diameter 130.935 km 0.505 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.093 h n/a LCDB (Rev. 2020-October); 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. http://www.minorplanet.info/call.html]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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 (A885 EB)          Discovered 1885-Mar-14 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A885 EB = 1947 TA = 1960 TC = A901 TB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-17 03:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin