+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2656 Evenkia (1979 HD5) Classification: Main-belt Asteroid          SPK-ID: 2002656 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07953738048178204 3.5614e-08   a 2.256296092516893 6.6234e-09 au q 2.076836211726819 8.0353e-08 au i 3.198698689510467 3.1268e-06 deg node 95.94925239251475 6.786e-05 deg peri 75.63257272076672 7.0534e-05 deg M 91.17801088861657 1.9333e-05 deg tp 2458686.969224574286 (2019-Jul-22.46922457) 6.634e-05 TDB period 1237.919955186793 3.39 5.4509e-06 1.492e-08 d yr n .2908104021521156 1.2805e-09 deg/d Q 2.435755973306967 7.1502e-09 au   Orbit Determination Parameters    # obs. used (total)      2447      data-arc span      24007 days (65.73 yr)      first obs. used      1955-02-23      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43292      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:07:35   Additional Information  Earth MOID = 1.08498 au   Jupiter MOID = 2.52894 au   T_jup = 3.617  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.3   n/a MPO365277   diameter diameter 6.086 km 0.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 7.0847 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Lang, K.; Jacobsen, J.; Kristensen, L.H.; Larsen, F.R. (2016) Minor Planet Bull. 43, 344-346.] [Pravec, P.; Wolf, M.; Sarounova, L. (2016) http://www.asu.cas.cz/~ppravec/neo.htm] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] [Oey, J.; Groom, R. (2018) Minor Planet Bull. 45, 363-366.] geometric albedo albedo 0.275   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   2656 Evenkia (1979 HD5)          Discovered 1979-Apr-25 by Chernykh, N. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1979 HD5 = 1955 DG = 1962 HB = 1982 DE1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-24 12:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin