+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1031 Arctica (A924 LC) Classification: Main-belt Asteroid          SPK-ID: 2001031 [ 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 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05676499317407809 3.5449e-08   a 3.051438922289274 1.3288e-08 au q 2.878224012694407 1.0621e-07 au i 17.61616097648449 4.2713e-06 deg node 218.8742623106451 1.3239e-05 deg peri 309.0817977527071 4.0966e-05 deg M 103.036795943654 3.8073e-05 deg tp 2458443.256137695949 (2018-Nov-20.75613770) 0.00020644 TDB period 1946.95291708373 5.33 1.2717e-05 3.482e-08 d yr n .1849043173263948 1.2078e-09 deg/d Q 3.224653831884142 1.4042e-08 au   Orbit Determination Parameters    # obs. used (total)      2731      data-arc span      35122 days (96.16 yr)      first obs. used      1924-06-06      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44067      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:26:38   Additional Information  Earth MOID = 1.90576 au   Jupiter MOID = 1.81011 au   T_jup = 3.163  [ 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 9.5   n/a MPO473776 IRAS observations used: 21 diameter diameter 75.400 km 0.497 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 24.904 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Polakis, T. (2018) Minor Planet Bull. 45, 269-273.] geometric albedo albedo 0.035   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.680   0.007 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.84, mean=7.85, max.=7.86) deg. U-B UB 0.325   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.84, mean=7.85, max.=7.86) deg. Tholen spectral type spec_T CX:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 1031 Arctica (A924 LC)          Discovered 1924-Jun-06 by Belyavskij, S. at Simeis Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A924 LC = A910 VB = A913 JA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-22 02:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin