+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 63 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2318947118171011 4.121e-08   a 2.22841607409815 5.9921e-09 au q 1.711658170786564 9.1746e-08 au i 5.712165257898569 3.2521e-06 deg node 275.1239771124662 4.2714e-05 deg peri 91.19845068042007 4.3146e-05 deg M 95.86321747252762 7.0323e-06 deg tp 2458876.949294599808 (2020-Jan-28.44929460) 2.3199e-05 TDB period 1215.046365175978 3.33 4.9008e-06 1.342e-08 d yr n .2962849898718559 1.195e-09 deg/d Q 2.745173977409736 7.3816e-09 au   Orbit Determination Parameters    # obs. used (total)      2191      data-arc span      25551 days (69.95 yr)      first obs. used      1951-02-04      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43689      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:05:24   Additional Information  Earth MOID = .720545 au   Jupiter MOID = 2.75667 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. 2020-October); 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 ] 2021-Feb-24 21:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin