+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   44 Nysa (A857 KA) Classification: Main-belt Asteroid          SPK-ID: 2000044 [ 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 121 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1485450301487183 3.3069e-08   a 2.423219986298952 3.6963e-09 au q 2.063262700377197 7.9982e-08 au i 3.711609381249713 3.6616e-06 deg node 131.496623204201 5.0894e-05 deg peri 344.0835720583497 5.2076e-05 deg M 238.5311958138353 1.1969e-05 deg tp 2459665.389722999517 (2022-Mar-26.88972300) 4.6144e-05 TDB period 1377.804790300952 3.77 3.1525e-06 8.631e-09 d yr n .2612851998586575 5.9783e-10 deg/d Q 2.783177272220707 4.2454e-09 au   Orbit Determination Parameters    # obs. used (total)      2877      data-arc span      57293 days (156.86 yr)      first obs. used      1864-03-02      last obs. used      2021-01-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55777      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:42:55   Additional Information  Earth MOID = 1.07978 au   Jupiter MOID = 2.30382 au   T_jup = 3.494  [ 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 6.92   n/a E2021B10 IRAS observations used: 18 magnitude slope G 0.46   n/a PDS3 (MPC 17257) Fit diameter diameter 70.64 km 4.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18 rotation period rot_per 6.422 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Bianchi, E.; Padova, E. (1920) Mem. Soc. Astron. Ital. 1, 56-65.] [Padova, E. (1921) Mem. Soc. Astron. Ital. 2, 82.] [Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 529-546.] [Shatzel, A.V. (1954) Astrophys. J. 120, 547-550.] [Cailliate, C. (1956) Publ. Observ. Lyon 3, fasc. 28.] [Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.] [Gehrels, T.; Owings, D. (1962) Astrophys. J. 135, 906-924.] [Yang, X.-y.; Zhang, Y.-y.; Li, X.-q. (1965) Acta Astron. Sin. 13, 66-74.] [Zappala, V.; van Houten-Groeneveld, I. (1979) Icarus 40, 289-296.] [Birch, P.V.; Tedesco, E.F.; Taylor, R.C.; Binzel, R.P.; et al. (1983) Icarus 54, 1-12.] [Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.] [Magnusson, P. (1983) in Asteroids, Comets, Meteors. C.-I. Lagerkvist, H. Rickman, eds. Uppsala, pp. 77-85.] [Taylor, R.C.; Tedesco, E.F. (1983) Icarus 54, 13-22.] [Magnusson, P. (1986) Icarus 68, 1-39.] [Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.] [Lagerkvist, C.-I.; Williams, I.P. (1987) Astron. Astrophys. Suppl. Ser. 68, 295-315.] [Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.] [Harris, A.W.; Young, J.W.; Contreiras, L.; Dockweiler, T.; et al. (1989) Icarus 81, 365-374.] [Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.] [De Angelis, G. (1993) Planet. Space Sci. 41, 285-290.] [Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Astron. Astrophys. 383, L19-L22.] [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Rosenbush, V.K.; Shevchenko, V.G.; Kiselev, N.N.; Sergeev, A.V.; et al. (2009) Icarus 201, 655-665.] [Shevchenko, V.G.; Velichko, F.P.; Checha, V.A.; Krugly, Y.N. (2014) Minor Planet Bull. 41, 195-198.] [Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Cellino, A.; Hestroffer, D.; Lu, X.-P.; Muinonen, K.; Tanga, P. (2019) Astron. Astrophys. 631, A67.] geometric albedo albedo 0.482   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.703   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=19; phase (min.=4.95, mean=15.61, max.=27.78) deg. U-B UB 0.245   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=18; phase (min.=5.27, mean=17.16, max.=27.78) deg. Tholen spectral type spec_T E   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B Xc   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) 44 Nysa (A857 KA)          Discovered 1857-May-27 by Goldschmidt, H. at Paris Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A857 KA = 1977 CE  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 07:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin