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6894 Macreid (1986 RE2)
Classification: Main-belt Asteroid          SPK-ID: 2006894
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07346078068649727 3.5927e-08  
a 2.651436618728655 1.2672e-08 au
q 2.456660014776082 9.7067e-08 au
i 21.21973424538558 5.7697e-06 deg
node 296.6687456598813 1.1868e-05 deg
peri 105.3413034934791 4.6877e-05 deg
M 266.4087400763528 4.4832e-05 deg
tp 2459410.470959990547
(2021-Jul-14.97095999)
0.00019721 TDB
period 1576.958636062836
4.32
1.1305e-05
3.095e-08
d
yr
n .2282875351117678 1.6366e-09 deg/d
Q 2.846213222681229 1.3603e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2258  
   data-arc span      10914 days (29.88 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35193  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:44:45  

Additional Information
 Earth MOID = 1.54653 au 
 Jupiter MOID = 2.44202 au 
 T_jup = 3.290 
[ 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 12.9   n/a MPO435765  
diameter diameter 7.677 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.521   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6894 Macreid           Discovered 1986 Sept. 5 by E. F. Helin at Palomar.
Named in honor of Macgregor S. Reid, a highly regarded manager at the Jet Propulsion Laboratory. For the past ten years he has been technical executive assistant to the director, responsible for planning and identifying issues of significance to the national space program and the laboratory's future. Reid is internationally recognized for his activities concerning international standard-setting. This object is being named to honor him on his retirement after a 30-year career at JPL. Citation prepared by E. C. Stone.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980610/MPCPages.arcLast Updated: 2009-11-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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