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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07263888035042315 1.2644e-07  
a 2.773142389868258 5.4587e-08 AU
q 2.571704431615931 3.5203e-07 AU
i 1.295284884820224 1.2773e-05 deg
node 18.71638482032913 0.000325 deg
peri 352.8691834103437 0.00033164 deg
M 183.8434940041163 8.4213e-05 deg
tp 2457625.877960270429
(2016-Aug-25.37796027)
0.00041296 JED
period 1686.773156730854
4.62
4.9804e-05
1.364e-07
d
yr
n .2134252602749016 6.3017e-09 deg/d
Q 2.974580348120585 5.8552e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      214  
   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      .62196  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 23:13:50  

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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