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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1541514789646238 1.4405e-08  
a 2.58165548381286 8.3365e-09 au
q 2.183689472805976 3.7792e-08 au
i 12.66401577880749 6.8639e-07 deg
node 203.8093261542625 3.6422e-06 deg
peri 82.69851623140528 7.9969e-06 deg
M 257.9337770598266 9.627e-06 deg
tp 2459630.061548159942
(2022-Feb-19.56154816)
4.145e-05 TDB
period 1515.115901057918
4.15
7.3388e-06
2.009e-08
d
yr
n .2376055849909784 1.1509e-09 deg/d
Q 2.979621494819744 9.6216e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2740  
   data-arc span      32674 days (89.46 yr)  
   first obs. used      1931-10-09  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41743  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:37:05  

Additional Information
 Earth MOID = 1.20978 au 
 Jupiter MOID = 2.24548 au 
 T_jup = 3.374 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.89   n/a MPCxxxxx  
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. 2020-October); 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

Alternate Designations
 1931 TR1 = 1987 BR3 = 1988 GE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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