Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.

JPL Small-Body Database Browser
Search: [ help ]  
4600 Meadows (1985 RE4)
Classification: Main-belt Asteroid          SPK-ID: 2004600
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09622079188846708 3.6761e-08  
a 3.011708100563174 1.6469e-08 au
q 2.721919162190074 1.0954e-07 au
i 11.2205609580672 4.0613e-06 deg
node 138.4381751675788 2.0087e-05 deg
peri 193.4452434265584 2.8578e-05 deg
M 162.3769663996082 2.1557e-05 deg
tp 2457739.427607578485
0.00011246 TDB
period 1909.051931102547
n .1885752787207244 1.5468e-09 deg/d
Q 3.301497038936274 1.8053e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2225  
   data-arc span      25133 days (68.81 yr)  
   first obs. used      1951-02-04  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47565  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 21:05:38  

Additional Information
 Earth MOID = 1.71116 au 
 Jupiter MOID = 2.03722 au 
 T_jup = 3.213 
[ 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 11.9   n/a MPO435742  
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-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:
[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 2019-Dec-12 14:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin