+ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1479601048418022 3.1595e-08   a 2.47306566901766 7.4288e-09 au q 2.107150613349145 7.9781e-08 au i 13.4152256867194 3.7133e-06 deg node 85.5508687549119 1.9575e-05 deg peri 23.52282981764076 2.528e-05 deg M 357.4051023431956 1.6297e-05 deg tp 2459010.739285038261 (2020-Jun-10.23928504) 6.4315e-05 TDB period 1420.53487316078 3.89 6.4007e-06 1.752e-08 d yr n .2534256685997276 1.1419e-09 deg/d Q 2.838980724686175 8.5279e-09 au   Orbit Determination Parameters    # obs. used (total)      2596      data-arc span      37242 days (101.96 yr)      first obs. used      1918-11-30      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38772      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:57:04   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. 2020-October); 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 34 CATAB v2.0f-lin.ifort 2020-Dec-18 01:57:11 2020-Dec-18 01:57 Alternate Designations  A918 WD = 1963 ME  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-15 19:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin