+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   618 Elfriede (A906 UM) Classification: Main-belt Asteroid          SPK-ID: 2000618 [ 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 112 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06949086323489737 3.421e-08   a 3.188708173670629 1.2453e-08 au q 2.967122090078083 1.0824e-07 au i 17.0590718050963 3.9991e-06 deg node 110.8417618396291 1.254e-05 deg peri 229.1246409769456 3.035e-05 deg M 23.16175974226726 2.7522e-05 deg tp 2458866.689670241694 (2020-Jan-18.18967024) 0.00015903 TDB period 2079.795285376485 5.69 1.2183e-05 3.336e-08 d yr n .1730939590695498 1.014e-09 deg/d Q 3.410294257263174 1.3318e-08 au   Orbit Determination Parameters    # obs. used (total)      2981      data-arc span      41667 days (114.08 yr)      first obs. used      1906-10-18      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39236      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:54:54   Additional Information  Earth MOID = 1.9815 au   Jupiter MOID = 1.9025 au   T_jup = 3.125  [ hide covariance matrix ] Orbital Elements at Epoch 2455832.5 (2011-Sep-28.0) TDB Reference: JPL 112 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07474007031819581 3.4462e-08   q 2.951436839807316 1.1002e-07 au tp 2456781.116471678617 (2014-May-03.61647168) 0.00014676 TDB node 111.0990993032047 1.2571e-05 deg peri 228.3867811580675 2.8308e-05 deg i 17.03597087696811 3.9954e-06 deg   Orbit Determination Parameters    # obs. used (total)      2981      data-arc span      41667 days (114.08 yr)      first obs. used      1906-10-18      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39236      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:54:54   Additional Information  Jupiter MOID = 1.9025 au   T_jup = 3.125  Orbit Covariance (6×6)   e q tp node peri i e 1.187654915345133E-15 -3.770899082206599E-15 -3.706151514129185E-13 -7.623737498347298E-16 -6.956583063876555E-14 -5.718408714967427E-17 q -3.770899082206599E-15 1.210420059455958E-14 1.042635775996017E-12 3.444149102505832E-15 1.857817547619471E-13 4.127069154291382E-16 tp -3.706151514129185E-13 1.042635775996017E-12 2.153772937992192E-8 9.753480885854556E-13 3.73842306898872E-9 1.325241601994157E-12 node -7.623737498347298E-16 3.444149102505832E-15 9.753480885854556E-13 1.580421151884575E-10 -1.506361661467552E-10 -1.60191281114781E-13 peri -6.956583063876555E-14 1.857817547619471E-13 3.73842306898872E-9 -1.506361661467552E-10 8.013536401647236E-10 2.676801488006609E-13 i -5.718408714967427E-17 4.127069154291382E-16 1.325241601994157E-12 -1.60191281114781E-13 2.676801488006609E-13 1.596293236620184E-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 8.3   n/a MPO452165   diameter diameter 131.292 km 1.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 14.791 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2006) Minor Planet Bull. 33, 85-88.] [Carbo, L.; Kragh, K.; Krotz, J.; Meiers, A.; et al. (2009) Minor Planet Bull. 36, 91-94.] [Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.] [Aznar, A.; Garceran, A.C.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 174-181.] [Klinglesmith III, D.A.; Hendrickx, S.; Kimber, C.; Madden, K. (2017) Minor Planet Bull. 44, 244-246.] geometric albedo albedo 0.050   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.696   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.46, mean=6.59, max.=11.35) deg. U-B UB 0.317   0.055 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.46, mean=6.59, max.=11.35) deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices 618 Elfriede (A906 UM)          Discovered 1906-Oct-17 by Lohnert, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-15 21:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin