+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   404 Arsinoe (A895 MA) Classification: Main-belt Asteroid          SPK-ID: 2000404 [ 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 124 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1985927490783884 2.9915e-08   a 2.5937893877523 4.9219e-09 au q 2.078681622708221 7.7515e-08 au i 14.10528622226007 3.5564e-06 deg node 92.59443372439983 1.4422e-05 deg peri 120.6487135269531 1.6824e-05 deg M 11.5490055228042 8.8355e-06 deg tp 2458951.551140338910 (2020-Apr-12.05114034) 3.7422e-05 TDB period 1525.810117866653 4.18 4.343e-06 1.189e-08 d yr n .2359402364583494 6.7157e-10 deg/d Q 3.108897152796379 5.8993e-09 au   Orbit Determination Parameters    # obs. used (total)      2913      data-arc span      44356 days (121.44 yr)      first obs. used      1899-05-30      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38625      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:53:22   Additional Information  Earth MOID = 1.10829 au   Jupiter MOID = 1.99945 au   T_jup = 3.348  [ 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 9.2   n/a MPO502156 IRAS observations used: 26 diameter diameter 94.970 km 0.951 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.887 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Schober, H.J. (1981) Astron. Astrophys. 100, 311-313.] [Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] [Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.037   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.675   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.57, mean=8.17, max.=19.96) deg. U-B UB 0.333   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.57, mean=8.17, max.=19.96) deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 404 Arsinoe (A895 MA)          Discovered 1895-Jun-20 by Charlois, A. at Nice Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A895 MA = 1947 XE = 1975 VB10 = A901 VC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 09:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin