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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 76 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .577909046325937 1.0427e-07  
a 2.591676966713056 2.3373e-08 AU
q 1.093923402495017 2.6474e-07 AU
i 36.01061891239296 2.4573e-05 deg
node 3.486663289870286 1.3234e-05 deg
peri 62.13297459920813 2.426e-05 deg
M 232.1898513676102 2.4143e-05 deg
tp 2457341.543980396719
(2015-Nov-15.04398040)
0.00010908 JED
period 1523.946533408995
4.17
2.0616e-05
5.644e-08
d
yr
n .2362287600698807 3.1957e-09 deg/d
Q 4.089430530931095 3.6881e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      456  
   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      .61946  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 09:20:43  

Additional Information
 Earth MOID = .292646 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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