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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2317969564275238 4.3879e-08  
a 2.228082489977941 6.226e-09 au
q 1.711619750131595 9.8148e-08 au
i 5.712518000235736 3.3001e-06 deg
node 275.1242023391453 4.6643e-05 deg
peri 91.17357665666827 4.7045e-05 deg
M 36.63379316745181 6.9513e-06 deg
tp 2458876.883992271389
(2020-Jan-28.38399227)
2.3271e-05 TDB
period 1214.773544712774
3.33
5.0917e-06
1.394e-08
d
yr
n .2963515311696387 1.2422e-09 deg/d
Q 2.744545229824287 7.6691e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2017  
   data-arc span      25472 days (69.74 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:06:24  

Additional Information
 Earth MOID = .722006 au 
 Jupiter MOID = 2.75626 au 
 T_jup = 3.602 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456480.5 (2013-Jul-07.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2318208706286212 4.3908e-08  
q 1.711468580680175 9.8211e-08 au
tp 2456447.582118521367
(2013-Jun-04.08211852)
2.1889e-05 TDB
node 275.2058998189074 4.6657e-05 deg
peri 91.16872429308015 4.7056e-05 deg
i 5.711500560275511 3.2997e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2017  
   data-arc span      25472 days (69.74 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:06:24  

Additional Information
 Jupiter MOID = 2.75626 au 
 T_jup = 3.602 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.9279122629785E-15 -4.307117436514298E-15 -3.003320277279921E-14 2.162520768057711E-14 -3.808707978510814E-14 -6.116490432456873E-15
q -4.307117436514298E-15 9.645497707286268E-15 5.580648349319365E-14 -4.816982885229668E-14 8.100863771710087E-14 1.371535516622009E-14
tp -3.003320277279921E-14 5.580648349319365E-14 4.791319231510287E-10 3.700971523775764E-12 1.561819871481833E-10 1.52760583007576E-13
node 2.162520768057711E-14 -4.816982885229668E-14 3.700971523775764E-12 2.176916965777637E-9 -2.164985882032579E-9 3.944636424342794E-12
peri -3.808707978510814E-14 8.100863771710087E-14 1.561819871481833E-10 -2.164985882032579E-9 2.214279732379415E-9 -3.836549324129677E-12
i -6.116490432456873E-15 1.371535516622009E-14 1.52760583007576E-13 3.944636424342794E-12 -3.836549324129677E-12 1.088812752866694E-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. 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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1940-Jul-17 15:30 < 00:01 Iris 0.0463462085852359 0.0463445202435362 0.0463478978417259 2.96836054422881 2.96836050244171 2429828.145523054 0.5899721107519 356.124183430171 29.2935558918463 -77.1416971477866 230560.155588384 T 59 CATAB v2.0f-lin.ifort 2020-Nov-13 04:06:30 2020-Nov-13 04:06
2011-Sep-30 03:56 < 00:01 Iris 0.021998468572329 0.021997675326718 0.0219992618196359 3.00012944218945 3.00012935508495 2455834.663690425 0.356600769291426 46.5286910134086 36.3530524834981 57.7395005979013 85271.0730968227 T 59 CATAB v2.0f-lin.ifort 2020-Nov-13 04:06:30 2020-Nov-13 04:06

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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