+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   508 Princetonia (A903 HC) Classification: Main-belt Asteroid          SPK-ID: 2000508 [ 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 90 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .008150031839207967 3.4827e-08   a 3.162471256662869 1.295e-08 au q 3.136697015230487 1.0852e-07 au i 13.33411050202178 4.0436e-06 deg node 44.20427806149904 1.4748e-05 deg peri 202.9956653992034 0.00025639 deg M 262.5673208828097 0.00025746 deg tp 2459556.456037751308 (2021-Dec-07.95603775) 0.0014701 TDB period 2054.179105038681 5.62 1.2618e-05 3.455e-08 d yr n .1752524885084064 1.0765e-09 deg/d Q 3.188245498095252 1.3056e-08 au   Orbit Determination Parameters    # obs. used (total)      2737      data-arc span      40975 days (112.18 yr)      first obs. used      1908-04-07      last obs. used      2020-06-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39991      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:15:21   Additional Information  Earth MOID = 2.1275 au   Jupiter MOID = 1.78755 au   T_jup = 3.162  [ 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 8.4   n/a MPO296126   diameter diameter 117.241 km 0.925 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 52.8 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Piironen, J.; Bowell, E.; Erikson, A.; Magnusson, P. (1994) Astron. Astrophys. Suppl. Ser. 106, 587-595.] geometric albedo albedo 0.065   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.732   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=1.13, mean=5.20, max.=7.94) deg. U-B UB 0.325   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=1.13, mean=5.20, max.=7.94) deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices 508 Princetonia (A903 HC)          Discovered 1903-Apr-20 by Dugan, R. S. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A903 HC = 1926 KA = A920 GF  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 06:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin