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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 | Close-Approach Data ]

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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456793.5 (2014-May-16.0) TDB
Reference: JPL 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2322809392146616 4.1221e-08  
q 1.710990512402631 9.1831e-08 au
tp 2456447.757454160346
(2013-Jun-04.25745416)
2.1317e-05 TDB
node 275.2026244265249 4.2735e-05 deg
peri 91.2077725488714 4.316e-05 deg
i 5.710578418124875 3.2515e-06 deg
  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
 Jupiter MOID = 2.75667 au 
 T_jup = 3.602 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.699204719183318E-15 -3.78061938025489E-15 -1.035005483763727E-13 1.182748353202333E-14 -6.296170867138178E-14 -5.163081563804589E-15
q -3.78061938025489E-15 8.432852339033296E-15 2.250715678528948E-13 -2.617408183286022E-14 1.389129927065152E-13 1.152996624598744E-14
tp -1.035005483763727E-13 2.250715678528948E-13 4.544241109336785E-10 2.28425859055278E-12 1.462140673935035E-10 3.927846080460782E-13
node 1.182748353202333E-14 -2.617408183286022E-14 2.28425859055278E-12 1.826272034136035E-9 -1.816584926501475E-9 1.429661201916221E-11
peri -6.296170867138178E-14 1.389129927065152E-13 1.462140673935035E-10 -1.816584926501475E-9 1.862815553932702E-9 -1.402873214435152E-11
i -5.163081563804589E-15 1.152996624598744E-14 3.927846080460782E-13 1.429661201916221E-11 -1.402873214435152E-11 1.057209633744441E-11

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.DBLast Updated: 2003-08-29

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Alternate Designations
 1966 PD = 1933 WF = 1966 RB = 1973 YR1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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