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17374 (1981 EF4)
Classification: Main-belt Asteroid          SPK-ID: 2017374
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1736219121266416 3.3474e-08  
a 2.346874245155633 1.0617e-08 au
q 1.939405451190944 7.9737e-08 au
i 6.749499138557727 3.7695e-06 deg
node 245.8150140693997 3.1708e-05 deg
peri 349.7907014678918 3.3462e-05 deg
M 338.6409441655312 1.2842e-05 deg
tp 2459278.413498498930
(2021-Mar-04.91349850)
4.7106e-05 TDB
period 1313.206898141548
3.60
8.911e-06
2.44e-08
d
yr
n .2741380665220937 1.8602e-09 deg/d
Q 2.754343039120323 1.246e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1425  
   data-arc span      14567 days (39.88 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-12-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51571  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:02:09  

Additional Information
 Earth MOID = .926728 au 
 Jupiter MOID = 2.25453 au 
 T_jup = 3.531 
[ 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 14.82   n/a E2021B10  
diameter diameter 3.188 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.275   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17374 (1981 EF4)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EF4 = 1999 GO36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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