+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2446 Lunacharsky (1971 TS2) Classification: Main-belt Asteroid          SPK-ID: 2002446 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1613309899438308 2.9685e-08   a 2.354368247060434 7.8031e-09 au q 1.974535687069852 6.9951e-08 au i 3.311031460790149 3.5607e-06 deg node 22.06493921440579 6.0314e-05 deg peri 251.6306938928676 6.1482e-05 deg M 298.9617055121888 1.3425e-05 deg tp 2459424.222623835200 (2021-Jul-28.72262384) 4.9575e-05 TDB period 1319.501884128746 3.61 6.5599e-06 1.796e-08 d yr n .2728302280808824 1.3564e-09 deg/d Q 2.734200807051015 9.062e-09 au   Orbit Determination Parameters    # obs. used (total)      2814      data-arc span      24549 days (67.21 yr)      first obs. used      1953-10-31      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43444      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:03:06   Additional Information  Earth MOID = .959549 au   Jupiter MOID = 2.37618 au   T_jup = 3.536  [ 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 13.17   n/a E2021B10   diameter diameter 12.954 km 0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 3.613 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Florczak, M.; Dotto, E.; Barucci, M.A.; Birlan, M.; et al. (1997) Planet. Space Sci. 45, 1423-1435.] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] geometric albedo albedo 0.079   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   SMASSII spectral type spec_B B   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) 2446 Lunacharsky (1971 TS2)          Discovered 1971-Oct-14 by Chernykh, L. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1971 TS2 = 1960 RB = 1970 FB = 1973 AU3 = 1975 XN1 = 1977 DE3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-07 09:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin