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16958 Klaasen (1998 PF)
Classification: Mars-crossing Asteroid          SPK-ID: 2016958
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2884896788617994 2.3143e-08  
a 2.008107749024011 6.5244e-09 au
q 1.428789389388183 4.5493e-08 au
i 41.95166775783896 1.58e-06 deg
node 152.385076984125 1.0134e-06 deg
peri 53.61174489519533 2.9322e-06 deg
M 31.53847790483021 5.4517e-06 deg
tp 2459109.442195680753
(2020-Sep-16.94219568)
1.5367e-05 TDB
period 1039.390983098412
2.85
5.0655e-06
1.387e-08
d
yr
n .3463566702559265 1.688e-09 deg/d
Q 2.587426108659839 8.4066e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1041  
   data-arc span      23715 days (64.93 yr)  
   first obs. used      1955-04-24  
   last obs. used      2020-03-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:48:16  

Additional Information
 Earth MOID = .549986 au 
 Jupiter MOID = 2.6524 au 
 T_jup = 3.476 
[ 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 14.9   n/a MPO452411  

16958 Klaasen           Discovered 1998 Aug. 2 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Kenneth P. Klaasen (b. 1946), a geomorphologist and expert in scientific operations of spacecraft at the Jet Propulsion Laboratory, has designed observational sequences for numerous planetary missions, most recently for Deep Impact, for which he has also overseen instrument calibration.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050721/MPCPages.arcLast Updated: 2005-07-21

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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