+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   6891 Triconia (1976 SA) Classification: Main-belt Asteroid          SPK-ID: 2006891 [ 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 .06159940749732891 1.9641e-08   a 2.684632400940725 8.7518e-09 au q 2.519260635694645 5.2972e-08 au i 5.978287894333852 7.3471e-07 deg node 160.5747835892529 4.7846e-06 deg peri 206.5894569705 2.0559e-05 deg M 8.142385729531137 1.8351e-05 deg tp 2459164.160843727226 (2020-Nov-10.66084373) 8.1921e-05 TDB period 1606.666239202083 4.40 7.8565e-06 2.151e-08 d yr n .2240664496558952 1.0957e-09 deg/d Q 2.850004166186805 9.2909e-09 au   Orbit Determination Parameters    # obs. used (total)      2548      data-arc span      16213 days (44.39 yr)      first obs. used      1976-09-23      last obs. used      2021-02-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44794      source      ORB      producer      Otto Matic      solution date      2021-Mar-16 19:19:29   Additional Information  Earth MOID = 1.51679 au   Jupiter MOID = 2.43643 au   T_jup = 3.364  [ 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 13.27   n/a E2021B10   diameter diameter 8.321 km 0.239 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.161   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   6891 Triconia (1976 SA)          Discovered 1976-Sep-23 by Harvard Observatory at Harvard Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1976 SA = 1981 WC8 = 1983 HH1 = 1989 RK  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 15:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin