+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 94 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .008055725319057565 3.4464e-08   a 3.161760363962896 1.264e-08 au q 3.136290090946127 1.0747e-07 au i 13.3351448495773 4.0282e-06 deg node 44.19672151140834 1.4688e-05 deg peri 204.518298684038 0.00025847 deg M 296.1012583568212 0.00025949 deg tp 2459564.986676775197 (2021-Dec-16.48667678) 0.0014807 TDB period 2053.486504817237 5.62 1.2314e-05 3.371e-08 d yr n .1753115976927448 1.0513e-09 deg/d Q 3.187230636979664 1.2742e-08 au   Orbit Determination Parameters    # obs. used (total)      2868      data-arc span      41196 days (112.79 yr)      first obs. used      1908-04-07      last obs. used      2021-01-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39359      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:47:14   Additional Information  Earth MOID = 2.12589 au   Jupiter MOID = 1.78775 au   T_jup = 3.163  [ 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 8.41   n/a E2021B10   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. 2020-October); 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 ] 2021-Mar-08 13:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin