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113394 Niebur (2002 SN21)
Classification: Main-belt Asteroid          SPK-ID: 2113394
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0724347751971121 1.2635e-07  
a 2.774307221751434 5.4602e-08 au
q 2.573350901816144 3.5208e-07 au
i 1.295088322077857 1.2769e-05 deg
node 18.71104107761832 0.00032456 deg
peri 352.5505257335699 0.00033127 deg
M 312.1824460770204 8.7329e-05 deg
tp 2457624.689418734848
(2016-Aug-24.18941873)
0.00041449 JED
period 1687.836037672338
4.62
4.9828e-05
1.364e-07
d
yr
n .2132908599916311 6.2967e-09 deg/d
Q 2.975263541686724 5.8557e-08 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      5171 days (14.16 yr)  
   first obs. used      2000-03-03  
   last obs. used      2014-04-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60813  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 17:25:41  

Additional Information
 Earth MOID = 1.5711 au 
 Jupiter MOID = 2.38295 au 
 T_jup = 3.332 
[ 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 15.8 mag n/a MPO293994  

113394 Niebur           Discovered 2002 Sept. 26 by MEAT at Palomar.
Trained as an astrophysicist, Susan Niebur (1978-2012) was a former Discovery Program Scientist at NASA and contributed to space-science policy. She founded the Women in Planetary Science and Toddler Planet websites. Name suggested by A. Sohus.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120406/MPCPages.arcLast Updated: 2012-04-09

[ show close-approach data ]
Alternate Designations
 2002 SN21 = 2000 EE194 = 2004 AB25 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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