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2754 Efimov (1966 PD)
Classification: Main-belt Asteroid          SPK-ID: 2002754
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .231894672800399 2.0151e-08  
a 2.228416058049016 5.4216e-09 au
q 1.711658245404585 4.5807e-08 au
i 5.712166868794063 7.2383e-07 deg
node 275.1239902487786 8.0002e-06 deg
peri 91.19843640496258 8.5575e-06 deg
M 95.86322388174484 3.6807e-06 deg
tp 2458876.949276463211
(2020-Jan-28.44927646)
1.1777e-05 TDB
period 1215.046352049766
3.33
4.4342e-06
1.214e-08
d
yr
n .2962849930726388 1.0813e-09 deg/d
Q 2.745173870693448 6.6789e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2390  
   data-arc span      25615 days (70.13 yr)  
   first obs. used      1951-02-04  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42597  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:30:02  

Additional Information
 Earth MOID = .720545 au 
 Jupiter MOID = 2.75667 au 
 T_jup = 3.602 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457071.5 (2015-Feb-18.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2328594846296696 2.0174e-08  
q 1.708883944845584 4.5882e-08 au
tp 2457662.335583501644
(2016-Sep-30.83558350)
1.0172e-05 TDB
node 275.1794000342995 8.01e-06 deg
peri 91.17394617434044 8.5629e-06 deg
i 5.709456738883568 7.236e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2390  
   data-arc span      25615 days (70.13 yr)  
   first obs. used      1951-02-04  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42597  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:30:02  

Additional Information
 Jupiter MOID = 2.75667 au 
 T_jup = 3.602 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.070051042474238E-16 -9.219612108655414E-16 -1.264640529228244E-13 -1.919885146610583E-14 6.746783705562514E-15 1.425077017171305E-15
q -9.219612108655414E-16 2.105179281727068E-15 2.886039141580662E-13 4.186120408283322E-14 -1.467481357876967E-14 -3.165842126415551E-15
tp -1.264640529228244E-13 2.886039141580662E-13 1.034691647443225E-10 -9.393019015928602E-12 2.855435091398738E-11 1.286971146278534E-13
node -1.919885146610583E-14 4.186120408283322E-14 -9.393019015928602E-12 6.415985679641248E-11 -6.64120241927047E-11 -9.80130464950683E-13
peri 6.746783705562514E-15 -1.467481357876967E-14 2.855435091398738E-11 -6.64120241927047E-11 7.332303372499219E-11 1.058607159658626E-12
i 1.425077017171305E-15 -3.165842126415551E-15 1.286971146278534E-13 -9.80130464950683E-13 1.058607159658626E-12 5.235899991928657E-13

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.DBLast 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 ]
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