+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 67 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2320065667103844 2.0028e-08   a 2.22832796088917 5.4155e-09 au q 1.711341241178522 4.5505e-08 au i 5.711785597895322 7.2332e-07 deg node 275.1184213879019 7.9987e-06 deg peri 91.20929304911211 8.5554e-06 deg M 153.919088741833 3.7897e-06 deg tp 2458877.034063545227 (2020-Jan-28.53406355) 1.1722e-05 TDB period 1214.974300149247 3.33 4.4291e-06 1.213e-08 d yr n .2963025637297658 1.0801e-09 deg/d Q 2.745314680599818 6.6719e-09 au   Orbit Determination Parameters    # obs. used (total)      2495      data-arc span      25684 days (70.32 yr)      first obs. used      1951-02-04      last obs. used      2021-05-31      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4253      source      ORB      producer      Otto Matic      solution date      2021-Jul-07 21:57:03   Additional Information  Earth MOID = .720941 au   Jupiter MOID = 2.75717 au   T_jup = 3.602  [ 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 13.67   n/a MPCxxxxx   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 Alternate Designations  1966 PD = 1933 WF = 1966 RB = 1973 YR1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-27 07:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin