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JPL Small-Body Database Browser
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21612 Chelsagloria (1999 JS57)
Classification: Main-belt Asteroid          SPK-ID: 2021612
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06992159317229753 3.311e-08  
a 2.255596730710899 7.6034e-09 au
q 2.097881813745367 7.4106e-08 au
i 6.111809650359936 4.079e-06 deg
node 238.8301765666977 3.1424e-05 deg
peri 201.9763909402894 4.2077e-05 deg
M 232.3102655008331 2.836e-05 deg
tp 2459439.378286565117
(2021-Aug-12.87828657)
9.7893e-05 TDB
period 1237.344441063684
3.39
6.2564e-06
1.713e-08
d
yr
n .2909456639983978 1.4711e-09 deg/d
Q 2.41331164767643 8.135e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1757  
   data-arc span      14031 days (38.41 yr)  
   first obs. used      1980-12-10  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47083  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:01:24  

Additional Information
 Earth MOID = 1.11457 au 
 Jupiter MOID = 2.74486 au 
 T_jup = 3.613 
[ 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 14.2   n/a MPO384939  
diameter diameter 4.157 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.136   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21612 Chelsagloria           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Chelsea Gloria Gordon (b. 1987) was awarded first place in the 2005 Intel International Science and Engineering Fair for her engineering team project. She also received the Intel Foundation Achievement Award. She attends the Half Hollow Hills High School East, Dix Hills, New York, 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: 20050822/MPCPages.arcLast Updated: 2005-08-26

Alternate Designations
 1999 JS57 = 1980 XO2 = 1990 VS13 = 1992 JL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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