+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   679 Pax (A909 BR) Classification: Main-belt Asteroid          SPK-ID: 2000679 [ 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 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3092269874507034 3.3521e-08   a 2.587594295176013 7.3856e-09 au q 1.787440306534108 8.5953e-08 au i 24.40671695221975 4.5569e-06 deg node 112.1172915219666 9.5636e-06 deg peri 266.991200962644 1.2249e-05 deg M 52.17271117212671 1.0007e-05 deg tp 2458980.164939492831 (2020-May-10.66493949) 4.1659e-05 TDB period 1520.346940010239 4.16 6.5092e-06 1.782e-08 d yr n .2367880583872359 1.0138e-09 deg/d Q 3.387748283817918 9.6695e-09 au   Orbit Determination Parameters    # obs. used (total)      3105      data-arc span      40900 days (111.98 yr)      first obs. used      1909-01-29      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38928      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:48:46   Additional Information  Earth MOID = .962635 au   Jupiter MOID = 2.61684 au   T_jup = 3.232  [ 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 9.19   n/a E2021B10 IRAS observations used: 3 diameter diameter 63.909 km 0.212 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.452 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Schober, H.J.; Erikson, A.; Hahn, G.; Lagerkvist, C.-I.; et al. (1994) Astron. Astrophys. Suppl. Ser. 105, 281-300.] [Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2003) Abstracts of Photometry and Polarimetry of Asteroids: Impact on Collaboration, Kharkiv, 9-10.] [Behrend, R. (2004) 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] [Marciniak, A.; Michalowski, T.; Polinska, M.; Bartczak, P.; et al. (2011) Astron. Astrophys. 529, A107.] [Wang, Y.-B.; Xu, Y.; Fan, C.-B.; Liu, C.-Z. (2018). Astron. Nach. 339, 457-464.] geometric albedo albedo 0.110   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.857   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=13.21, mean=21.87, max.=26.35) deg. U-B UB 0.447   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=13.21, mean=21.87, max.=26.35) deg. Tholen spectral type spec_T I   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B K   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) 679 Pax (A909 BR)          Discovered 1909-Jan-28 by Kopff, A. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A909 BR = 1973 QD  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 17:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin