+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4895 Embla (1986 TK4) Classification: Main-belt Asteroid          SPK-ID: 2004895 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2367060108991335 4.3567e-08   a 2.354159749006697 8.1695e-09 au q 1.796915985800017 1.0021e-07 au i 7.127228911813433 3.8336e-06 deg node 38.47285989587185 2.7453e-05 deg peri 342.1022253338025 2.8296e-05 deg M 167.6765337997516 8.5493e-06 deg tp 2458585.999686621883 (2019-Apr-12.49968662) 2.9705e-05 TDB period 1319.326609412829 3.61 6.8676e-06 1.88e-08 d yr n .2728664740266394 1.4204e-09 deg/d Q 2.911403512213378 1.0103e-08 au   Orbit Determination Parameters    # obs. used (total)      2219      data-arc span      24049 days (65.84 yr)      first obs. used      1955-03-22      last obs. used      2021-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4692      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:21:03   Additional Information  Earth MOID = .800288 au   Jupiter MOID = 2.54892 au   T_jup = 3.507  [ 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 13.59   n/a E2021B10   diameter diameter 5.317 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 14.90 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2015) http://www.asu.cas.cz/~ppravec/neo.htm] [Hills, K. (2017) Minor Planet Bull. 44, 114-115.] geometric albedo albedo 0.216   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4895 Embla (1986 TK4)          Discovered 1986-Oct-13 by Jensen, P. at Brorfelde Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1986 TK4 = 1939 TH = 1968 UM = 1979 YR  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-07 08:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin