+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5 Astraea (A845 XA) Classification: Main-belt Asteroid          SPK-ID: 2000005 [ 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 117 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1907878601997365 2.3724e-08   a 2.573620788517801 3.8712e-09 au q 2.082605185310932 6.0855e-08 au i 5.367533694017649 2.7383e-06 deg node 141.5717012979097 2.8872e-05 deg peri 358.625008579418 2.9762e-05 deg M 65.61238161485116 8.2326e-06 deg tp 2458925.648214755066 (2020-Mar-17.14821476) 3.4316e-05 TDB period 1508.048332538809 4.13 3.4025e-06 9.316e-09 d yr n .2387191393222377 5.3861e-10 deg/d Q 3.064636391724671 4.6097e-09 au   Orbit Determination Parameters    # obs. used (total)      3113      data-arc span      63952 days (175.09 yr)      first obs. used      1845-12-15      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52573      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:03:05   Additional Information  Earth MOID = 1.09563 au   Jupiter MOID = 1.95988 au   T_jup = 3.396  [ hide covariance matrix ] Orbital Elements at Epoch 2452112.5 (2001-Jul-22.0) TDB Reference: JPL 117 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1927037752024725 2.4018e-08   q 2.077651461955614 6.1788e-08 au tp 2451379.112295975180 (1999-Jul-19.61229597) 3.2331e-05 TDB node 141.6903338594413 2.882e-05 deg peri 357.6752685397097 2.9666e-05 deg i 5.368723806377527 2.7423e-06 deg   Orbit Determination Parameters    # obs. used (total)      3113      data-arc span      63952 days (175.09 yr)      first obs. used      1845-12-15      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52573      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:03:05   Additional Information  Jupiter MOID = 1.95988 au   T_jup = 3.396  Orbit Covariance (6×6)   e q tp node peri i e 5.768842890645359E-16 -1.482304712217504E-15 -1.411936351060266E-14 2.581381930332273E-17 3.863599118227875E-15 -2.254030600480136E-18 q -1.482304712217504E-15 3.817715413932129E-15 2.346903666520447E-14 6.338914648401364E-17 -1.208447766658426E-14 1.240248949898048E-17 tp -1.411936351060266E-14 2.346903666520447E-14 1.04527669082249E-9 8.800322146518039E-13 2.351369136763722E-10 2.474836545659006E-13 node 2.581381930332273E-17 6.338914648401364E-17 8.800322146518039E-13 8.306029677639248E-10 -8.266740337940636E-10 6.362464408245373E-12 peri 3.863599118227875E-15 -1.208447766658426E-14 2.351369136763722E-10 -8.266740337940636E-10 8.800469572197172E-10 -6.279726688225547E-12 i -2.254030600480136E-18 1.240248949898048E-17 2.474836545659006E-13 6.362464408245373E-12 -6.279726688225547E-12 7.520188809217677E-12 [ 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 6.99   n/a E2021B10 IRAS observations used: 9 diameter diameter 106.699 km 3.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   rotation period rot_per 16.806 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.] [Taylor, R.C. (1978) Astron. J. 83, 201-204.] [Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.] [Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.] [De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.] [Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. Space Sci. 49, 657-671.] [Shevchenko, V.G.; Bel'skaya, I.N.; Krugly, Yu.N.; Chiorny, V.G.; Gaftonyuk, N.M. (2002) Icarus 155, 365-374.] [Lopez-Gonzalez, M.J.; Rodriguez, E. (2005) Planet. Space Sci. 53, 1147-1165.] [Higley, S.; Hardersen, P.; Dyvig, R. (2008) Minor Planet Bull. 35, 63-66.] [Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.] [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.] [Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.] [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.] geometric albedo albedo 0.274   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.826   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=10.69, mean=16.26, max.=24.05) deg. U-B UB 0.411   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=10.69, mean=16.26, max.=24.05) 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 SMASSII spectral type spec_B S   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) 5 Astraea (A845 XA)          Discovered 1845-Dec-08 by Hencke, K. L. at Driesen Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A845 XA = 1969 SE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 22:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin