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21608 Gloyna (1999 GQ35)
Classification: Main-belt Asteroid          SPK-ID: 2021608
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1516744761996448 4.5329e-08  
a 2.366591140220926 9.0717e-09 au
q 2.007639668649197 1.0616e-07 au
i 5.651641760578443 3.7022e-06 deg
node 235.7125022506676 4.9874e-05 deg
peri 69.86113439162195 5.1624e-05 deg
M 254.3882376811411 1.4736e-05 deg
tp 2459590.615375381865
(2022-Jan-11.11537538)
5.4968e-05 TDB
period 1329.790660186655
3.64
7.6461e-06
2.093e-08
d
yr
n .2707193025024472 1.5566e-09 deg/d
Q 2.725542611792655 1.0448e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1422  
   data-arc span      14553 days (39.84 yr)  
   first obs. used      1981-05-08  
   last obs. used      2021-03-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50458  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:50:13  

Additional Information
 Earth MOID = .999109 au 
 Jupiter MOID = 2.50361 au 
 T_jup = 3.525 
[ 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 14.72   n/a E2021B10  
diameter diameter 2.983 km 0.257 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.345   0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21608 Gloyna           Discovered 1999 Apr. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Tara Ellen Gloyna (b. 1989) was awarded second place in the 2005 Intel International Science and Engineering Fair for her environmental sciences project. She attends the Temple High School, Temple, 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: 20050822/MPCPages.arcLast Updated: 2005-08-26

[ show close-approach data ]
Alternate Designations
 1999 GQ35 = 1981 JU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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