+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   240 Vanadis (A884 QB) Classification: Main-belt Asteroid          SPK-ID: 2000240 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 47 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2078088387015235 3.6338e-08   a 2.664311208317503 6.6117e-09 au q 2.11064379017759 9.8486e-08 au i 2.105548443300199 3.6048e-06 deg node 115.0679674566883 0.0001013 deg peri 300.9969460390165 0.00010165 deg M 16.70553489782938 8.992e-06 deg tp 2458926.788756162743 (2020-Mar-18.28875616) 3.9533e-05 TDB period 1588.458432711446 4.35 5.9128e-06 1.619e-08 d yr n .2266348256815835 8.4362e-10 deg/d Q 3.217978626457416 7.9857e-09 au   Orbit Determination Parameters    # obs. used (total)      3037      data-arc span      49696 days (136.06 yr)      first obs. used      1884-08-29      last obs. used      2020-09-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4903      source      ORB      producer      Otto Matic      solution date      2020-Oct-22 15:24:41   Additional Information  Earth MOID = 1.12343 au   Jupiter MOID = 2.1412 au   T_jup = 3.352  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.1   n/a MPO502155 IRAS observations used: 9 diameter diameter 87.928 km 1.616 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 10.64 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Denchev, P. (1999) Abstracts of ACM 1999, 117.] [Denchev, P. (2000) Planet. Space Sci. 48, 987-992.] [Alton, K.B. (2016) Minor Planet Bull. 43, 217-218.] geometric albedo albedo 0.031   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   B-V BV 0.705   0.011 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.73, mean=8.50, max.=15.96) deg. U-B UB 0.368   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.73, mean=8.50, max.=15.96) deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices SMASSII spectral type spec_B C   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) 240 Vanadis (A884 QB)          Discovered 1884-Aug-27 by Borrelly, A. at Marseille Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-23 03:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin