+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 99 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .007907440275764333 1.6052e-08   a 3.160985585923691 9.1858e-09 au q 3.135990281190447 5.17e-08 au i 13.33662261992281 5.2612e-07 deg node 44.19386100346034 1.2824e-06 deg peri 205.9141237799394 0.00013048 deg M 329.0778726624169 0.00012809 deg tp 2459572.818979497641 (2021-Dec-24.31897950) 0.00073019 TDB period 2052.731751802948 5.62 8.9479e-06 2.45e-08 d yr n .1753760566541664 7.6446e-10 deg/d Q 3.185980890656934 9.2585e-09 au   Orbit Determination Parameters    # obs. used (total)      3256      data-arc span      41354 days (113.22 yr)      first obs. used      1908-04-07      last obs. used      2021-06-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .38616      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 11:10:13   Additional Information  Earth MOID = 2.12743 au   Jupiter MOID = 1.78816 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-Jul-29 23:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin