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21541 Friskop (1998 QP16)
Classification: Main-belt Asteroid          SPK-ID: 2021541
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04261902927969181 3.0179e-08  
a 2.964440786689728 1.7375e-08 au
q 2.838099198003885 8.6027e-08 au
i 9.521487746386919 5.252e-06 deg
node 169.7172011058196 2.5415e-05 deg
peri 123.2158637482476 7.8038e-05 deg
M 206.0983966647453 7.5337e-05 deg
tp 2460193.490675454547
(2023-Sep-05.99067545)
0.0003922 TDB
period 1864.286251382489
5.10
1.6391e-05
4.488e-08
d
yr
n .1931033926431827 1.6977e-09 deg/d
Q 3.09078237537557 1.8116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1286  
   data-arc span      18307 days (50.12 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-05-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:34:04  

Additional Information
 Earth MOID = 1.83552 au 
 Jupiter MOID = 2.01348 au 
 T_jup = 3.243 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457198.5 (2015-Jun-25.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04584413688220312 3.0191e-08  
q 2.82586491057056 8.6368e-08 au
tp 2456461.538882805749
(2013-Jun-18.03888281)
0.00035624 TDB
node 169.7961100893348 2.5379e-05 deg
peri 122.2095766125023 7.3223e-05 deg
i 9.52950039478071 5.2553e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1286  
   data-arc span      18307 days (50.12 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-05-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:34:04  

Additional Information
 Jupiter MOID = 2.01348 au 
 T_jup = 3.243 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.115168956117275E-16 -2.563783075955622E-15 8.943182266599548E-13 3.892220776286776E-17 1.647863481099552E-13 2.123321729529998E-16
q -2.563783075955622E-15 7.459459651722568E-15 -1.305755474576057E-12 1.373269662866594E-15 -2.147479141519219E-13 -1.25004048369556E-16
tp 8.943182266599548E-13 -1.305755474576057E-12 1.269057369995309E-7 1.602773047211678E-11 2.449092777605996E-8 -1.647957206335597E-11
node 3.892220776286776E-17 1.373269662866594E-15 1.602773047211678E-11 6.441015009195577E-10 -6.317203953493589E-10 6.686316931097006E-11
peri 1.647863481099552E-13 -2.147479141519219E-13 2.449092777605996E-8 -6.317203953493589E-10 5.361632664247728E-9 -6.910044782536246E-11
i 2.123321729529998E-16 -1.25004048369556E-16 -1.647957206335597E-11 6.686316931097006E-11 -6.910044782536246E-11 2.761854217548626E-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 14.09   n/a MPCxxxxx  
diameter diameter 5.717 km 0.546 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.163   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21541 Friskop           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Andrew John Friskop (b. 1987) was awarded first place and Best in Category in the 2005 Intel International Science and Engineering Fair for his botany project. He attends the Hankinson High School, Hankinson, North Dakota, 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
 1998 QP16 = 4243 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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