+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   454 Mathesis (A900 FB) Classification: Main-belt Asteroid          SPK-ID: 2000454 [ 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 107 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1100611870631869 3.6716e-08   a 2.629609664496309 5.0194e-09 au q 2.340191703309016 9.5994e-08 au i 6.288945954710048 4.1764e-06 deg node 32.26283436093023 3.5633e-05 deg peri 177.8795560391027 4.0125e-05 deg M 61.38952045803712 1.8458e-05 deg tp 2458734.900594957818 (2019-Sep-08.40059496) 7.9793e-05 TDB period 1557.526188538055 4.26 4.4595e-06 1.221e-08 d yr n .2311357604445211 6.6179e-10 deg/d Q 2.919027625683601 5.5719e-09 au   Orbit Determination Parameters    # obs. used (total)      3099      data-arc span      44060 days (120.63 yr)      first obs. used      1900-03-31      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44173      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:53:46   Additional Information  Earth MOID = 1.33471 au   Jupiter MOID = 2.04213 au   T_jup = 3.383  [ 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 9.3   n/a MPO473767 IRAS observations used: 3 diameter diameter 81.743 km 1.432 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.378 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Buchheim, R.K. (2006) Minor Planet Bull. 33, 29-30.] [Licchelli, D. (2006) Minor Planet Bull. 33, 105-106.] geometric albedo albedo 0.055   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.662   0.055 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.19, mean=8.51, max.=13.15) deg. U-B UB 0.347   0.058 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=4.19, mean=8.51, max.=13.15) deg. Tholen spectral type spec_T CB   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 454 Mathesis (A900 FB)          Discovered 1900-Mar-28 by Schwassmann, A. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 11:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin