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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2317969543528825 4.3249e-08  
a 2.228082490214597 6.1728e-09 au
q 1.711619754935867 9.664e-08 au
i 5.712517899134067 3.2951e-06 deg
node 275.1242075812016 4.5799e-05 deg
peri 91.17357120448858 4.621e-05 deg
M 36.63379318609834 6.9496e-06 deg
tp 2458876.883992188774
(2020-Jan-28.38399219)
2.3263e-05 TDB
period 1214.773544906314
3.33
5.0482e-06
1.382e-08
d
yr
n .2963515311224232 1.2315e-09 deg/d
Q 2.744545225493327 7.6036e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2037  
   data-arc span      25488 days (69.78 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4491  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:08:12  

Additional Information
 Earth MOID = .722006 au 
 Jupiter MOID = 2.75626 au 
 T_jup = 3.602 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456557.5 (2013-Sep-22.0) TDB
Reference: JPL 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2318929723385749 4.3274e-08  
q 1.711496205153411 9.6687e-08 au
tp 2456447.610569154889
(2013-Jun-04.11056915)
2.1795e-05 TDB
node 275.2055338314083 4.5811e-05 deg
peri 91.18201440421851 4.6218e-05 deg
i 5.71152086336856 3.2947e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2037  
   data-arc span      25488 days (69.78 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4491  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:08:12  

Additional Information
 Jupiter MOID = 2.75626 au 
 T_jup = 3.602 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.872626988243278E-15 -4.178932971534937E-15 -4.491389989907287E-14 2.058525609330861E-14 -4.414835365097814E-14 -5.93359437221455E-15
q -4.178932971534937E-15 9.348353908727685E-15 8.98646116052911E-14 -4.589653354473185E-14 9.508688970605174E-14 1.329349642123131E-14
tp -4.491389989907287E-14 8.98646116052911E-14 4.750348670431379E-10 3.211739745294948E-12 1.547208692104297E-10 2.060683442608819E-13
node 2.058525609330861E-14 -4.589653354473185E-14 3.211739745294948E-12 2.098626529331092E-9 -2.08723495527534E-9 5.550679376582964E-12
peri -4.414835365097814E-14 9.508688970605174E-14 1.547208692104297E-10 -2.08723495527534E-9 2.13613665854018E-9 -5.410797492830477E-12
i -5.93359437221455E-15 1.329349642123131E-14 2.060683442608819E-13 5.550679376582964E-12 -5.410797492830477E-12 1.085486395283606E-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

[ hide close-approach data ]
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 61 CATAB v2.0f-lin.ifort 2020-Dec-18 02:08:18 2020-Dec-18 02:08
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 61 CATAB v2.0f-lin.ifort 2020-Dec-18 02:08:18 2020-Dec-18 02:08

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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