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18727 Peacock (1998 KW3)
Classification: Main-belt Asteroid          SPK-ID: 2018727
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1098763215563656 5.486e-08  
a 3.134166102229377 3.7272e-08 AU
q 2.78979545976976 1.8966e-07 AU
i 5.358375015562109 7.6814e-06 deg
node 179.5677177887009 5.5147e-05 deg
peri 74.25649698790934 6.54e-05 deg
M 333.2418380445583 3.5583e-05 deg
tp 2457151.138234777297
(2015-May-08.63823478)
0.00020034 JED
period 2026.662541699669
5.55
3.6152e-05
9.898e-08
d
yr
n .1776319404897495 3.1687e-09 deg/d
Q 3.478536744688993 4.1367e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      863  
   data-arc span      8947 days (24.50 yr)  
   first obs. used      1990-12-24  
   last obs. used      2015-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55573  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:23:38  

Additional Information
 Earth MOID = 1.78324 AU 
 T_jup = 3.196 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.3 mag n/a MPO257001  

18727 Peacock           Discovered 1998 May 22 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Anthony Peacock (b. 1950) was project scientist for the ESA Exosat and XMM-Newton missions. A leading expert on detectors for use in high-energy astrophysics, he has also developed the S-CAM, a cryogenic camera having an ultrafast photon-counting detector, for groundbased optical astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070926/MPCPages.arcLast Updated: 2007-09-30

[ show close-approach data ]
Alternate Designations
 1998 KW3 = 1994 TW4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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