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JPL Small-Body Database Browser
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18180 Irenesun (2000 QB30)
Classification: Main-belt Asteroid          SPK-ID: 2018180
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1589900788059191 3.389e-08  
a 2.210744786192328 6.9847e-09 au
q 1.859258298415835 7.628e-08 au
i 4.513270483182901 4.0476e-06 deg
node 53.3988881916692 4.4596e-05 deg
peri 218.585409686937 4.6293e-05 deg
M 63.76018823655919 1.3899e-05 deg
tp 2458787.855854225141
4.6054e-05 TDB
period 1200.622121674595
n .2998445501719408 1.421e-09 deg/d
Q 2.562231273968821 8.0952e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1512  
   data-arc span      8426 days (23.07 yr)  
   first obs. used      1996-04-15  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50645  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:35:10  

Additional Information
 Earth MOID = .845697 au 
 Jupiter MOID = 2.53331 au 
 T_jup = 3.637 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO474007  
diameter diameter 3.104 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 10.306 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.291   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

18180 Irenesun           Discovered 2000 Aug. 25 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Irene Yuan Sun (b. 1986) was awarded second place in the 2003 Intel International Science and Engineering Fair for her medicine and health project. She attends the Ben Davis High School, Indianapolis, Indiana, 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: 20040614/MPCPages.arcLast Updated: 2009-12-11

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Alternate Designations
 2000 QB30 = 1999 CR43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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