+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2797 Teucer (1981 LK) Classification: Jupiter Trojan          SPK-ID: 2002797 [ 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 64 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08762970671407264 4.4177e-08   a 5.106851800887856 6.3437e-08 au q 4.65933987534382 2.4932e-07 au i 22.38959042183922 4.9972e-06 deg node 69.93033365226384 1.1432e-05 deg peri 48.44014609081455 3.1369e-05 deg M 242.9614934896231 3.0362e-05 deg tp 2460370.922813707582 (2024-Mar-01.42281371) 0.00036463 TDB period 4215.298260756495 11.54 7.8543e-05 2.15e-07 d yr n .08540320938888744 1.5913e-09 deg/d Q 5.554363726431893 6.8996e-08 au   Orbit Determination Parameters    # obs. used (total)      1768      data-arc span      28863 days (79.02 yr)      first obs. used      1940-12-28      last obs. used      2020-01-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49474      source      ORB      producer      Otto Matic      solution date      2020-Jan-28 18:44:49   Additional Information  Earth MOID = 3.7165 au   Jupiter MOID = .0228503 au   T_jup = 2.844  [ 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 8.7   n/a MPO421657   diameter diameter 89.430 km 0.755 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   rotation period rot_per 10.145 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [French, L.M.; Stephens, R.D.; Lederer, S.M.; Coley, D.R.; Rohl, D.A. (2011) Minor Planet Bull. 38, 116-120.] [Stephens, R.D.; Coley, D.R.; French, L.M. (2014) Minor Planet Bull. 41, 210-212.] [Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 15-22.] geometric albedo albedo 0.073   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   2797 Teucer (1981 LK)          Discovered 1981-Jun-04 by Bowell, E. at Flagstaff (AM) Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1981 LK = 1940 YG = 1975 VA1 = 1975 XQ2 = 1978 EQ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-15 18:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin