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21853 Kelseykay (1999 TU146)
Classification: Main-belt Asteroid          SPK-ID: 2021853
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07012277583454529 2.9994e-08  
a 2.988694126375371 1.4945e-08 au
q 2.779118598113529 9.2568e-08 au
i 4.384796296600761 3.2659e-06 deg
node 147.2780455172691 4.2923e-05 deg
peri 262.5559982296243 4.9761e-05 deg
M 43.26219297993481 2.3948e-05 deg
tp 2459169.708558488472
(2020-Nov-16.20855849)
0.00012595 TDB
period 1887.211750500429
5.17
1.4156e-05
3.876e-08
d
yr
n .1907576083629934 1.4309e-09 deg/d
Q 3.198269654637214 1.5993e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1398  
   data-arc span      10567 days (28.93 yr)  
   first obs. used      1992-04-29  
   last obs. used      2021-04-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49433  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:37:12  

Additional Information
 Earth MOID = 1.79308 au 
 Jupiter MOID = 2.0729 au 
 T_jup = 3.249 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457611.5 (2016-Aug-11.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06929349035879576 2.987e-08  
q 2.780989638777231 9.1586e-08 au
tp 2457262.115776399927
(2015-Aug-27.61577640)
0.00013191 TDB
node 147.5219896277702 4.2877e-05 deg
peri 258.7133740585962 4.9941e-05 deg
i 4.386451841223324 3.2691e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1398  
   data-arc span      10567 days (28.93 yr)  
   first obs. used      1992-04-29  
   last obs. used      2021-04-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49433  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:37:12  

Additional Information
 Jupiter MOID = 2.0729 au 
 T_jup = 3.249 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.922214878763597E-16 -2.705043905399487E-15 -4.317963802005692E-14 -1.140031756627855E-15 5.116837837001105E-15 -7.45492806547363E-16
q -2.705043905399487E-15 8.387978828099221E-15 -4.327666993732287E-13 2.981664272277774E-15 -1.194699882323683E-13 2.499410572394335E-15
tp -4.317963802005692E-14 -4.327666993732287E-13 1.740060925868644E-8 1.081980747371206E-11 3.391391618718421E-9 4.168650160124005E-14
node -1.140031756627855E-15 2.981664272277774E-15 1.081980747371206E-11 1.838400984733513E-9 -1.830698644719455E-9 8.618245380786587E-12
peri 5.116837837001105E-15 -1.194699882323683E-13 3.391391618718421E-9 -1.830698644719455E-9 2.494096990364135E-9 -8.615426136994449E-12
i -7.45492806547363E-16 2.499410572394335E-15 4.168650160124005E-14 8.618245380786587E-12 -8.615426136994449E-12 1.068715846438689E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.34   n/a E2021B10  

21853 Kelseykay           Discovered 1999 Oct. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Kelsey Kay Burnham (b. 1993) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her botany & zoology project. She attends the Yearling Middle School, Okeechobee, Florida.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051019/MPCPages.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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