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9400 (1994 TW1)
Classification: Amor [NEO]          SPK-ID: 2009400
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 75 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5781026961504625 1.3584e-07  
a 2.591343673854623 2.6378e-08 AU
q 1.093280909346821 3.4611e-07 AU
i 36.02020326714837 3.0657e-05 deg
node 3.518835893393349 1.4866e-05 deg
peri 62.09789390451772 2.7726e-05 deg
M 137.721011831526 2.4919e-05 deg
tp 2455817.613961878970
(2011-Sep-13.11396188)		 9.7796e-05 JED
period 1523.65257075127
4.17		 2.3265e-05
6.37e-08		 d
yr
n .2362743363616643 3.6077e-09 deg/d
Q 4.089406438362426 4.1628e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      7714 days (21.12 yr)  
   first obs. used      1991-03-18  
   last obs. used      2012-04-30  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .55024  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 15:44:10  

Additional Information
 Earth MOID = .292469 AU 
 T_jup = 2.939 
[ 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 14.8 mag n/a PDS3 (MPC 32629)  
SMASSII spectral type spec_B Sr   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

9400 (1994 TW1)          Discovered 1994-Oct-09 by Helin, E. F., Lawrence, K. J. at Palomar (675)
Reference: 19981005/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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