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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 77 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .57790899040722 9.9229e-08  
a 2.591676946802445 2.3904e-08 AU
q 1.093923539014177 2.5125e-07 AU
i 36.01062565017795 2.2542e-05 deg
node 3.48663442653512 1.347e-05 deg
peri 62.13298460789545 2.4352e-05 deg
M 232.1898734539528 2.4781e-05 deg
tp 2457341.543880666278
(2015-Nov-15.04388067)
0.00011206 JED
period 1523.94651584737
4.17
2.1084e-05
5.772e-08
d
yr
n .2362287627921291 3.2682e-09 deg/d
Q 4.089430354590712 3.7718e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      461  
   data-arc span      7714 days (21.12 yr)  
   first obs. used      1991-03-18  
   last obs. used      2012-04-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62026  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 19:31:55  

Additional Information
 Earth MOID = .292647 AU 
 T_jup = 2.940 
[ 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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