+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   621 Werdandi (A906 VM) Classification: Main-belt Asteroid          SPK-ID: 2000621 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1357316438852802 3.0667e-08   a 3.134608917588505 1.4567e-08 au q 2.709143296266758 9.2823e-08 au i 2.297977527048292 3.7616e-06 deg node 66.8218112107285 9.131e-05 deg peri 34.96863070479688 9.2431e-05 deg M 221.5159777605933 1.5498e-05 deg tp 2459980.277396893586 (2023-Feb-04.77739689) 8.8251e-05 TDB period 2027.092066956225 5.55 1.413e-05 3.869e-08 d yr n .1775943016444029 1.238e-09 deg/d Q 3.560074538910252 1.6544e-08 au   Orbit Determination Parameters    # obs. used (total)      3135      data-arc span      41670 days (114.09 yr)      first obs. used      1906-11-11      last obs. used      2020-12-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41297      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:48:16   Additional Information  Earth MOID = 1.72626 au   Jupiter MOID = 1.58785 au   T_jup = 3.197  [ 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 11.09   n/a E2021B10 IRAS observations used: 9 diameter diameter 29.726 km 0.491 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 11.776 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Strabla, L.; Quadri, U.; Girelli, R.; Pilcher, F. (2012) Minor Planet Bull. 39, 154-155.] [Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.] [Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.] geometric albedo albedo 0.127   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.650   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=13.59, mean=13.59, max.=13.59) deg. U-B UB 0.285   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=13.59, mean=13.59, max.=13.59) deg. Tholen spectral type spec_T FCX:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 621 Werdandi (A906 VM)          Discovered 1906-Nov-11 by Kopff, A. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A906 VM = 1952 BO  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-01 02:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin