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21629 Siperstein (1999 NT8)
Classification: Main-belt Asteroid          SPK-ID: 2021629
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03014773953614577 3.9355e-08  
a 2.192229690069327 5.3446e-09 au
q 2.126138920369711 8.6533e-08 au
i 1.206520222150588 3.5816e-06 deg
node 179.9527819490378 0.00013418 deg
peri 41.15986391736613 0.00014206 deg
M 359.0127444775437 4.6382e-05 deg
tp 2459399.751281558649
(2021-Jul-04.25128156)
0.00015275 TDB
period 1185.570842087237
3.25
4.3356e-06
1.187e-08
d
yr
n .3036511925058885 1.1104e-09 deg/d
Q 2.258320459768942 5.5057e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1721  
   data-arc span      9053 days (24.79 yr)  
   first obs. used      1996-09-12  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4852  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:10:22  

Additional Information
 Earth MOID = 1.11744 au 
 Jupiter MOID = 2.70116 au 
 T_jup = 3.671 
[ 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 15.31   n/a MPCxxxxx  

21629 Siperstein           Discovered 1999 July 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Brian Furness Siperstein (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his microbiology team project. He attends the Oregon Episcopal School, Portland, Oregon, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

Alternate Designations
 1999 NT8 = 1996 RM25 = 1998 EU15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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