+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07995723674792696 3.508e-08   a 2.256175034323255 6.7251e-09 au q 2.075777512959108 7.9446e-08 au i 3.198069390034974 3.1256e-06 deg node 95.94375086997726 6.6624e-05 deg peri 75.77616457592424 6.9308e-05 deg M 149.1513128972495 1.9177e-05 deg tp 2458687.659646909101 (2019-Jul-23.15964691) 6.5729e-05 TDB period 1237.820328406431 3.39 5.5345e-06 1.515e-08 d yr n .290833808217921 1.3004e-09 deg/d Q 2.436572555687401 7.2629e-09 au   Orbit Determination Parameters    # obs. used (total)      2471      data-arc span      24037 days (65.81 yr)      first obs. used      1955-02-23      last obs. used      2020-12-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .43186      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 14:04:48   Additional Information  Earth MOID = 1.08349 au   Jupiter MOID = 2.52703 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 13.39   n/a E2021B10   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-May-11 13:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin