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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5778191477154159 7.8224e-08  
a 2.591763253415359 1.7341e-08 AU
q 1.094192819246763 2.0048e-07 AU
i 36.01050740311486 2.1723e-05 deg
node 3.474859574201566 1.3357e-05 deg
peri 62.13978622504546 2.3284e-05 deg
M 279.4282662577688 1.9132e-05 deg
tp 2457341.592073451595
(2015-Nov-15.09207345)
8.415e-05 JED
period 1524.022640935342
4.17
1.5295e-05
4.188e-08
d
yr
n .2362169631410832 2.3707e-09 deg/d
Q 4.089333687583955 2.7361e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      471  
   data-arc span      8895 days (24.35 yr)  
   first obs. used      1991-03-18  
   last obs. used      2015-07-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61615  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-26 06:16:16  

Additional Information
 Earth MOID = .294003 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
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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