+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1076 Viola (1926 TE) Classification: Main-belt Asteroid          SPK-ID: 2001076 [ 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 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1461743788891069 3.2361e-08   a 2.473380880829157 6.6937e-09 au q 2.111835966817763 8.1025e-08 au i 3.320605877686516 3.3765e-06 deg node 143.6058002794189 6.0501e-05 deg peri 304.6048404642038 6.1532e-05 deg M 323.3473269974044 1.2081e-05 deg tp 2459145.156541457513 (2020-Oct-22.65654146) 4.7883e-05 TDB period 1420.806469449494 3.89 5.7677e-06 1.579e-08 d yr n .253377224654309 1.0286e-09 deg/d Q 2.834925794840551 7.6721e-09 au   Orbit Determination Parameters    # obs. used (total)      2839      data-arc span      34376 days (94.12 yr)      first obs. used      1926-10-05      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44628      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:58:11   Additional Information  Earth MOID = 1.13038 au   Jupiter MOID = 2.3569 au   T_jup = 3.466  [ 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 12.2   n/a MPO502163 IRAS observations used: 9 diameter diameter 22.298 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.336 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Binzel, R.P.; Mulholland, J.D. (1983) Icarus 56, 519-533.] geometric albedo albedo 0.041   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.629   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.99, mean=10.53, max.=16.77) deg. U-B UB 0.250   0.055 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=2.99, mean=10.53, max.=16.77) deg. Tholen spectral type spec_T F   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo 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) 1076 Viola (1926 TE)          Discovered 1926-Oct-05 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-21 06:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin