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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07263893749015009 1.4307e-07  
a 2.773142355013249 6.2021e-08 AU
q 2.571704240836154 3.9821e-07 AU
i 1.29529100437927 1.3979e-05 deg
node 18.71668520937754 0.00038072 deg
peri 352.8688925201185 0.00038702 deg
M 183.8434978115077 9.233e-05 deg
tp 2457625.877926869982
(2016-Aug-25.37792687)
0.00045276 JED
period 1686.77312492984
4.62
5.6587e-05
1.549e-07
d
yr
n .2134252642986435 7.1599e-09 deg/d
Q 2.974580469190344 6.6526e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      203  
   data-arc span      5145 days (14.09 yr)  
   first obs. used      2000-03-03  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5702  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 15:53:02  

Additional Information
 Earth MOID = 1.56997 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 15.7 mag n/a MPO248071  

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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