+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2754 Efimov (1966 PD) Classification: Main-belt Asteroid          SPK-ID: 2002754 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 57 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2317969386127307 4.511e-08   a 2.22808249174654 6.3173e-09 au q 1.711619791183067 1.0107e-07 au i 5.712518186318523 3.3029e-06 deg node 275.1241975743947 4.7965e-05 deg peri 91.17357980205718 4.8348e-05 deg M 36.63379313599116 6.9518e-06 deg tp 2458876.883992230364 (2020-Jan-28.38399223) 2.3273e-05 TDB period 1214.773546159161 3.33 5.1664e-06 1.414e-08 d yr n .2963515308167835 1.2604e-09 deg/d Q 2.744545192310012 7.7816e-09 au   Orbit Determination Parameters    # obs. used (total)      1925      data-arc span      25183 days (68.95 yr)      first obs. used      1951-02-04      last obs. used      2020-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44935      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 16:30:13   Additional Information  Earth MOID = .722006 au   Jupiter MOID = 2.75626 au   T_jup = 3.602  [ 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 13.6   n/a MPO279543   rotation period rot_per 2.44967 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Pray, D.; Pravec, P.; Pikler, M.; Husarik, M.; et al. (2006) CBET 617.] [Pravec, P.; Scheirich, P.; Vokrouhlicky, D.; Harris, A.W.; et al. (2012) Icarus 218, 125-143. See also supplemental on-line material.] SMASSII spectral type spec_B Sa   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 2754 Efimov (1966 PD)          Discovered 1966-Aug-13 by Smirnova, T. at Nauchnyj Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1966 PD = 1933 WF = 1966 RB = 1973 YR1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-23 17:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin