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3251 Eratosthenes (6536 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2003251
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1523146601955692 3.3406e-08  
a 3.117859861327478 1.3133e-08 au
q 2.642964096011979 1.0943e-07 au
i .7240962902453528 3.3463e-06 deg
node 142.2835849252383 0.00022883 deg
peri 236.7799345234225 0.00022907 deg
M 332.8946300906177 1.044e-05 deg
tp 2459351.903582369433
(2021-May-17.40358237)
5.8633e-05 TDB
period 2010.866844290123
5.51
1.2705e-05
3.478e-08
d
yr
n .1790272692705753 1.1311e-09 deg/d
Q 3.592755626642977 1.5133e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2689  
   data-arc span      24712 days (67.66 yr)  
   first obs. used      1953-05-18  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47312  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:09:03  

Additional Information
 Earth MOID = 1.6439 au 
 Jupiter MOID = 1.869 au 
 T_jup = 3.199 
[ 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 12.85   n/a E2021B10  
diameter diameter 14.984 km 0.457 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.065   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3251 Eratosthenes (6536 P-L)          Discovered 1960-Sep-24 by PLS at Palomar
These planets have all been discovered as a result of the Palomar survey of faint minor planets and subsequently identified with planets observed at other oppositions. In Sept. and Oct. 1960, T. Gehrels exposed 130 plates with the 122 cm Schmidt camera at Palomar. In the following years C. J. van Houten and I. van Houten-Groeneveld measured these plates astrometrically and photometrically at Leiden. P. Herget, Cincinnati, computed the orbits of the planets found on the NORC computer, Dahlgren, Virginia, USA.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 6536 P-L = 1955 XE = 1982 RU1 = A916 SA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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