+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   503 Evelyn (A903 BL) Classification: Main-belt Asteroid          SPK-ID: 2000503 [ 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 59 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1761143277766588 1.0536e-08   a 2.722168374435296 6.4034e-09 au q 2.242755521076744 2.7555e-08 au i 5.010302916617226 4.5326e-07 deg node 68.89264165201978 3.3931e-06 deg peri 41.71511066240816 9.6963e-06 deg M 89.5686302741214 6.9493e-06 deg tp 2458792.345738637628 (2019-Nov-04.84573864) 3.1683e-05 TDB period 1640.479860423938 4.49 5.7884e-06 1.585e-08 d yr n .219447985120017 7.7432e-10 deg/d Q 3.201581227793849 7.5312e-09 au   Orbit Determination Parameters    # obs. used (total)      3421      data-arc span      43148 days (118.13 yr)      first obs. used      1903-01-19      last obs. used      2021-03-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .43676      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 10:59:29   Additional Information  Earth MOID = 1.26225 au   Jupiter MOID = 1.93447 au   T_jup = 3.330  [ 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 9.35   n/a E2021B10   diameter diameter 81.68 km 4.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 rotation period rot_per 38.780 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Kamel, L.; Lundgren, K. (1999) Minor Planet Bull. 26, 4-5.] [Fauerbach, M.; Bennett, T.; Marks, S.A. (2007) Minor Planet Bull. 34, 57-58.] [Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Mansego, E.A.; Rodriguez, P.B.; de Haro, J.L.; Chiner, O.R.; et al. (2016) Minor Planet Bull. 43, 332-336.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.0585   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6 B-V BV 0.725   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=17.75 deg. U-B UB 0.315   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=17.75 deg. Tholen spectral type spec_T XC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices SMASSII spectral type spec_B Ch   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) 503 Evelyn (A903 BL)          Discovered 1903-Jan-19 by Dugan, R. S. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A903 BL = 1948 BA = 1948 DA = A899 GA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 00:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin