+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1287 Lorcia (1933 QL) Classification: Main-belt Asteroid          SPK-ID: 2001287 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06251207683486852 2.7921e-08   a 3.01005813362151 1.2013e-08 au q 2.821893148295142 8.189e-08 au i 9.821099465771415 4.2105e-06 deg node 202.5138348948733 1.7824e-05 deg peri 267.5722065545658 3.8647e-05 deg M 103.1738541724805 3.3969e-05 deg tp 2458453.826646765431 (2018-Dec-01.32664677) 0.00017997 TDB period 1907.483332312479 5.22 1.1419e-05 3.126e-08 d yr n .1887303516112852 1.1298e-09 deg/d Q 3.198223118947879 1.2764e-08 au   Orbit Determination Parameters    # obs. used (total)      3390      data-arc span      31789 days (87.03 yr)      first obs. used      1933-08-25      last obs. used      2020-09-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40269      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:20:34   Additional Information  Earth MOID = 1.86053 au   Jupiter MOID = 1.92581 au   T_jup = 3.225  [ 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 11.1   n/a MPO473781   diameter diameter 21.678 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.8776 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Stone, G. (2017) Posting on CALL web site: http://www.minorplanet.info/call.html] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.140   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.850   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.32 deg. U-B UB 0.360   0.060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=7.32 deg. 1287 Lorcia (1933 QL)          Discovered 1933-Aug-25 by Arend, S. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1933 QL = 1954 TG  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 06:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin