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4418 Fredfranklin (1931 TR1)
Classification: Main-belt Asteroid          SPK-ID: 2004418
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1540526645419108 2.952e-08  
a 2.581987645259511 1.023e-08 au
q 2.184225568692989 7.4004e-08 au
i 12.66404140001904 5.0304e-06 deg
node 203.8330653953364 1.4524e-05 deg
peri 82.52910858332115 2.3178e-05 deg
M 115.5828209913485 1.7666e-05 deg
tp 2458113.957865809733
(2017-Dec-26.45786581)
7.4806e-05 TDB
period 1515.408317656538
4.15
9.0064e-06
2.466e-08
d
yr
n .2375597360826897 1.4119e-09 deg/d
Q 2.979749721826032 1.1806e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2349  
   data-arc span      32201 days (88.16 yr)  
   first obs. used      1931-10-09  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43319  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:44:07  

Additional Information
 Earth MOID = 1.21146 au 
 Jupiter MOID = 2.2451 au 
 T_jup = 3.373 
[ 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 12.8   n/a MPO365300  
diameter diameter 7.030 km 0.851 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 4.8190 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2005) Minor Planet Bull. 32, 90-92.]
geometric albedo albedo 0.326   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4418 Fredfranklin (1931 TR1)          Discovered 1931-Oct-09 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1931 TR1 = 1987 BR3 = 1988 GE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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