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13857 Stafford (1999 XE109)
Classification: Main-belt Asteroid          SPK-ID: 2013857
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1597733304874222 6.4762e-08  
a 2.626232189630803 2.3951e-08 AU
q 2.206630326060214 1.7073e-07 AU
i 4.667618288446222 6.9084e-06 deg
node 102.9643321254406 8.5235e-05 deg
peri 219.8406408732355 8.8163e-05 deg
M 217.2748334904744 2.4783e-05 deg
tp 2457416.805672043978
(2016-Jan-29.30567204)
0.00011094 JED
period 1554.52641858382
4.26
2.1266e-05
5.822e-08
d
yr
n .2315817831696688 3.168e-09 deg/d
Q 3.045834053201392 2.7778e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      863  
   data-arc span      10014 days (27.42 yr)  
   first obs. used      1986-11-07  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56542  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:04:37  

Additional Information
 Earth MOID = 1.19539 AU 
 T_jup = 3.379 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0 mag n/a PDS3 (MPC 38416)  

13857 Stafford           Discovered 1999 Dec. 4 by the Catalina Sky Survey.
Gregory Stafford (b. 1963) is an electronics engineer at the University of Arizona's Steward Observatory. He has been an important force in the development of control systems for a new generation of small telescopes. He has also been active in outreach activities to youth programs.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120831/MPCPages.arcLast Updated: 2012-09-04

Alternate Designations
 1999 XE109 = 1986 VP4 = 1990 QD12 = 1998 KM65 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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