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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1587194766320486 2.755e-08  
a 2.211144214890984 5.7132e-09 au
q 1.860192562345505 6.0561e-08 au
i 4.512749302509675 3.919e-06 deg
node 53.39747827592524 3.5024e-05 deg
peri 218.6200719328612 3.7197e-05 deg
M 182.466719986212 1.3831e-05 deg
tp 2459988.744868584151
(2023-Feb-13.24486858)
4.694e-05 TDB
period 1200.947521916655
3.29
4.6545e-06
1.274e-08
d
yr
n .2997633064144695 1.1618e-09 deg/d
Q 2.562095867436463 6.6199e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2090  
   data-arc span      9129 days (24.99 yr)  
   first obs. used      1996-04-15  
   last obs. used      2021-04-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47614  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:58:57  

Additional Information
 Earth MOID = .846539 au 
 Jupiter MOID = 2.53129 au 
 T_jup = 3.636 
[ 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 14.77   n/a E2021B10  
diameter diameter 3.104 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.306 h n/a LCDB (Rev. 2020-October); 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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

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