+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   162 Laurentia (A876 HB) Classification: Main-belt Asteroid          SPK-ID: 2000162 [ 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 50 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1816759134434192 3.2467e-08   a 3.014403401091069 8.9963e-09 au q 2.4667589097109 9.87e-08 au i 6.092064188231451 3.7972e-06 deg node 35.45398374851642 3.221e-05 deg peri 115.8860840502605 3.3765e-05 deg M 241.3536467078458 1.1442e-05 deg tp 2459830.517157738273 (2022-Sep-08.01715774) 6.2053e-05 TDB period 1911.615237151806 5.23 8.5576e-06 2.343e-08 d yr n .1883224160403631 8.4305e-10 deg/d Q 3.562047892471239 1.0631e-08 au   Orbit Determination Parameters    # obs. used (total)      3315      data-arc span      52862 days (144.73 yr)      first obs. used      1876-04-24      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38013      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:44:00   Additional Information  Earth MOID = 1.48459 au   Jupiter MOID = 1.46266 au   T_jup = 3.215  [ 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 8.94   n/a E2021B10 IRAS observations used: 12 diameter diameter 97.021 km 0.493 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 11.8686 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Piironen, J.; Bowell, E.; Erikson, A.; Magnusson, P. (1994) Astron. Astrophys. Suppl. Ser. 106, 587-595.] [Behrend, R. (2002) 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] [Oey, J.; Krajewski, R. (2008) Minor Planet Bull. 35, 47-48.] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] geometric albedo albedo 0.051   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.747   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=4.08, mean=7.16, max.=10.96) deg. U-B UB 0.374   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=4.08, mean=7.16, max.=10.96) deg. Tholen spectral type spec_T STU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 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) 162 Laurentia (A876 HB)          Discovered 1876-Apr-21 by Henry, Prosper at Paris In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul. Note: "planet" implies "minor planet" Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-05 17:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin