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344074 (1997 UH9)
Classification: Aten [NEO]          SPK-ID: 2344074
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4747264046056718 1.6785e-07  
a .8300223996283199 3.4768e-09 au
q .4359888501105955 1.4075e-07 au
i 25.49024423470012 1.869e-05 deg
node 42.40391339660384 9.3637e-06 deg
peri 180.9137389851874 2.9396e-05 deg
M 122.5698921563953 3.53e-05 deg
tp 2458906.459604011713
(2020-Feb-26.95960401)
2.7426e-05 TDB
period 276.206023846263
0.76
1.7355e-06
4.752e-09
d
yr
n 1.303374904670352 8.1895e-09 deg/d
Q 1.224055949146044 5.1274e-09 au
  Orbit Determination Parameters
   # obs. used (total)      369  
   data-arc span      8070 days (22.09 yr)  
   first obs. used      1997-10-29  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5612  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:16:09  

Additional Information
 Earth MOID = .223778 au 
 Jupiter MOID = 3.75524 au 
 T_jup = 6.904 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.8   n/a MPO503387  
SMASSII spectral type spec_B Sq   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)

344074 (1997 UH9)          Discovered 1997-Oct-29 by NEAT at Haleakala
Reference: 20121128/Numbers.arcLast Updated: 2012-12-03

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