+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   660 Crescentia (A908 AN) Classification: Main-belt Asteroid          SPK-ID: 2000660 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 88 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1076348261707142 4.0015e-08   a 2.534029845012378 6.6109e-09 au q 2.261279983133069 1.0212e-07 au i 15.1995822825015 3.39e-06 deg node 156.9275745817372 1.5786e-05 deg peri 105.8192927621313 2.1232e-05 deg M 216.8249475891488 1.5577e-05 deg tp 2459786.477398321493 (2022-Jul-25.97739832) 6.4545e-05 TDB period 1473.384223324018 4.03 5.7657e-06 1.579e-08 d yr n .2443354518808574 9.5615e-10 deg/d Q 2.806779706891687 7.3224e-09 au   Orbit Determination Parameters    # obs. used (total)      3629      data-arc span      40833 days (111.79 yr)      first obs. used      1909-06-07      last obs. used      2021-03-24      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .39039      source      ORB      producer      Otto Matic      solution date      2021-May-03 18:43:17   Additional Information  Earth MOID = 1.29703 au   Jupiter MOID = 2.38494 au   T_jup = 3.392  [ 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 9.08   n/a E2021B10 IRAS observations used: 9 diameter diameter 42.302 km 0.352 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.9116 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.] [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; et al. (2014) Astron. J. 147, A56.] [Stephens, R.D. (2014) Minor Planet Bull. 41, 226-230.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Cikignese, A. (2019) Minor Planet Bull. 46, 10.] geometric albedo albedo 0.332   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.860   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=11.13, mean=16.71, max.=19.70) deg. U-B UB 0.475   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=11.13, mean=16.71, max.=19.70) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo 660 Crescentia (A908 AN)          Discovered 1908-Jan-08 by Metcalf, J. H. at Taunton Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A908 AN = 1961 CF  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-17 01:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin