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40343 (1999 NH9)
Classification: Main-belt Asteroid          SPK-ID: 2040343
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1574982760464505 3.1643e-08  
a 2.409047349514927 8.0366e-09 au
q 2.029626545052055 7.627e-08 au
i 6.75254614284309 3.8931e-06 deg
node 127.473502071637 2.5828e-05 deg
peri 250.7390456765317 2.8092e-05 deg
M 156.4445383057729 1.104e-05 deg
tp 2458406.995062692384
(2018-Oct-15.49506269)
4.1293e-05 TDB
period 1365.734973841894
3.74
6.8342e-06
1.871e-08
d
yr
n .2635943333773599 1.319e-09 deg/d
Q 2.788468153977799 9.3024e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1686  
   data-arc span      8092 days (22.15 yr)  
   first obs. used      1998-03-25  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51759  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 00:16:55  

Additional Information
 Earth MOID = 1.04282 au 
 Jupiter MOID = 2.69552 au 
 T_jup = 3.494 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO493131  
rotation period rot_per 7.63165 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

40343 (1999 NH9)          Discovered 1999-Jul-13 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 NH9 = 1998 HS139 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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