+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   908 Buda (A918 WD) Classification: Main-belt Asteroid          SPK-ID: 2000908 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1479601035153642 3.1659e-08   a 2.473065669343292 7.4463e-09 au q 2.107150616906965 7.9963e-08 au i 13.41522561979211 3.7195e-06 deg node 85.55086894955474 1.9584e-05 deg peri 23.52283001348696 2.5289e-05 deg M 357.4051017346705 1.6316e-05 deg tp 2459010.739287441481 (2020-Jun-10.23928744) 6.4389e-05 TDB period 1420.534873441346 3.89 6.4157e-06 1.757e-08 d yr n .2534256685496743 1.1446e-09 deg/d Q 2.838980721779618 8.548e-09 au   Orbit Determination Parameters    # obs. used (total)      2569      data-arc span      37040 days (101.41 yr)      first obs. used      1918-11-30      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .3893      source      ORB      producer      Otto Matic      solution date      2020-May-20 01:15:19   Additional Information  Earth MOID = 1.13002 au   Jupiter MOID = 2.33869 au   T_jup = 3.430  [ 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 10.8   n/a MPO502161 IRAS observations used: 8 diameter diameter 30.749 km 0.492 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 14.572 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Oey, J.; Williams, H.; Groom, R. (2017) Minor Planet Bull. 44, 200-204.] geometric albedo albedo 0.087   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   B-V BV 0.820   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.45 deg. U-B UB 0.350   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.45 deg. SMASSII spectral type spec_B L   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) 908 Buda (A918 WD)          Discovered 1918-Nov-30 by Wolf, M. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2127-Mar-17 09:37 < 00:01 Iris 0.0155012244763785 0.01549275563447 0.0155096940355016 6.76560002130365 6.76559996648849 2498005.900432296 0.980101958784264 454.062111157274 39.4563346826226 21.6617849676142 22201.0493359236 T 31 CATAB v2.0f-lin.ifort 2020-May-20 01:15:32 2020-May-20 01:15 Alternate Designations  A918 WD = 1963 ME  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-27 02:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin