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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2317969425647172 4.5021e-08  
a 2.228082491402371 6.311e-09 au
q 1.711619782113324 1.0086e-07 au
i 5.712518099501626 3.3029e-06 deg
node 275.1241980879041 4.7889e-05 deg
peri 91.17357952471296 4.8273e-05 deg
M 36.63379320543402 6.9516e-06 deg
tp 2458876.883992024680
(2020-Jan-28.38399202)
2.3272e-05 TDB
period 1214.773545877694
3.33
5.1613e-06
1.413e-08
d
yr
n .296351530885449 1.2591e-09 deg/d
Q 2.744545200691418 7.7739e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1944  
   data-arc span      25432 days (69.63 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44781  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:41:02  

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.DBLast 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 ]
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