+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 46 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05721113759730615 3.4983e-08   a 3.051765771364012 1.3668e-08 au q 2.877170779903756 1.0475e-07 au i 17.60796765774708 4.1254e-06 deg node 218.7584327118879 1.3237e-05 deg peri 309.6025239440155 3.9898e-05 deg M 139.5346653197423 3.7145e-05 deg tp 2458445.747017899327 (2018-Nov-23.24701790) 0.00020164 TDB period 1947.265741696654 5.33 1.3082e-05 3.582e-08 d yr n .1848746127923618 1.242e-09 deg/d Q 3.226360762824267 1.445e-08 au   Orbit Determination Parameters    # obs. used (total)      2923      data-arc span      35263 days (96.54 yr)      first obs. used      1924-06-06      last obs. used      2020-12-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42767      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:51:54   Additional Information  Earth MOID = 1.90358 au   Jupiter MOID = 1.80646 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 9.57   n/a E2021B10 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. 2020-October); Warner et al., 2009 Published Reference List: [Polakis, T. (2018) Minor Planet Bull. 45, 269-273.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] 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 ] 2021-Feb-25 08:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin