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18930 Athreya (2000 QW27)
Classification: Main-belt Asteroid          SPK-ID: 2018930
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0070588943811616 3.0151e-08  
a 2.839866233175061 1.2602e-08 au
q 2.819819917378451 8.8446e-08 au
i 2.004372632857323 3.1863e-06 deg
node 18.7260920477231 9.6504e-05 deg
peri 160.4388127319091 0.0002677 deg
M 254.5483615650569 0.00025056 deg
tp 2459712.530797732141
(2022-May-13.03079773)
0.0012171 TDB
period 1748.015392831391
4.79
1.1635e-05
3.185e-08
d
yr
n .2059478431805346 1.3708e-09 deg/d
Q 2.859912548971671 1.2691e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1772  
   data-arc span      12049 days (32.99 yr)  
   first obs. used      1988-02-21  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49788  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:42:41  

Additional Information
 Earth MOID = 1.816 au 
 Jupiter MOID = 2.09537 au 
 T_jup = 3.309 
[ show covariance matrix ]

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 14.27   n/a E2021B10  
diameter diameter 3.905 km 0.840 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 13.232 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   0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18930 Athreya           Discovered 2000 Aug. 24 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Khannan Kameshvaran Athreya (b. 1987) was awarded third place in the 2003 Intel International Science and Engineering Fair for his zoology team project. He attends the Keystone School, San Antonio, Texas, 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: 20040830/MPCPages.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 2000 QW27 = 1988 DM2 = 1998 FU134 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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