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4600 Meadows (1985 RE4)
Classification: Main-belt Asteroid          SPK-ID: 2004600
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09664331189770546 3.471e-08  
a 3.010606211500559 1.5252e-08 au
q 2.719651256401341 1.0508e-07 au
i 11.2222176974425 3.7649e-06 deg
node 138.4423391008828 1.9382e-05 deg
peri 193.4651387740406 2.7683e-05 deg
M 237.8152759374509 2.1533e-05 deg
tp 2459648.080508516002
0.00011613 TDB
period 1908.004334047658
n .1886788166965494 1.4338e-09 deg/d
Q 3.301561166599777 1.6726e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2613  
   data-arc span      25383 days (69.49 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44894  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:17:35  

Additional Information
 Earth MOID = 1.7098 au 
 Jupiter MOID = 2.04024 au 
 T_jup = 3.214 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.0   n/a MPO502197  
diameter diameter 13.305 km 0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.682 h n/a LCDB (Rev. 2019-August); 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:
[Folberth, J.; Casimir, S.; Dou, Y.; Evans, D; et al. (2012) Minor Planet Bull. 39, 51-55.]
geometric albedo albedo 0.190   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

4600 Meadows           Discovered 1985 Sept. 10 by H. Debehogne at the European Southern Observatory.
Jack Meadows (b. 1934), now retired from the Department of Information and Library Studies at Loughborough University, was responsible for initiating the program for detecting fast-moving objects using the infrared survey satellite IRAS. He also carried out the first ultraviolet survey of minor planets using the IUE satellite.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

Alternate Designations
 1985 RE4 = 1973 FK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Oct-31 06:08 UT
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