+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 53 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2079332108341832 3.3881e-08   a 2.664573154350813 6.2431e-09 au q 2.110519902864081 9.1365e-08 au i 2.105567679803966 3.5438e-06 deg node 115.0674655170587 9.6587e-05 deg peri 300.9895020861401 9.6955e-05 deg M 62.02505256917584 8.9947e-06 deg tp 2458926.781255555708 (2020-Mar-18.28125556) 3.919e-05 TDB period 1588.692696230218 4.35 5.5835e-06 1.529e-08 d yr n .2266014068386152 7.9639e-10 deg/d Q 3.218626405837545 7.5412e-09 au   Orbit Determination Parameters    # obs. used (total)      3283      data-arc span      49815 days (136.39 yr)      first obs. used      1884-08-29      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47493      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:44:40   Additional Information  Earth MOID = 1.12256 au   Jupiter MOID = 2.14139 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 9.21   n/a E2021B10 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. 2020-October); 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 ] 2021-Mar-09 04:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin