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9841 Masek (1988 UT)
Classification: Main-belt Asteroid          SPK-ID: 2009841
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1598224573875623 3.5115e-08  
a 2.189945284770354 5.8266e-09 au
q 1.839942847814051 7.8215e-08 au
i 2.197522414507254 3.1964e-06 deg
node 138.5520619275665 9.7534e-05 deg
peri 264.548730754969 9.8145e-05 deg
M 261.2129087469081 1.0555e-05 deg
tp 2459325.322437074605
(2021-Apr-20.82243707)
3.5187e-05 TDB
period 1183.718194994409
3.24
4.7241e-06
1.293e-08
d
yr
n .3041264394873144 1.2137e-09 deg/d
Q 2.539947721726656 6.7578e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1931  
   data-arc span      15887 days (43.50 yr)  
   first obs. used      1975-11-09  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48823  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:45:24  

Additional Information
 Earth MOID = .850198 au 
 Jupiter MOID = 2.84382 au 
 T_jup = 3.656 
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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 15.1   n/a MPO435793  
diameter diameter 2.739 km 0.743 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.235   0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

9841 Mašek           Discovered 1988 Oct. 18 by Z. Vavrova at Klet.
Martin Mašek (b. 1988) is an avid observer of deep-sky objects, variable stars, comets and asteroids. He follows up and confirms NEOCP objects from southern sky remotely via a robotic telescope at Pierre Auger Observatory, Argentina. He is also discoverer of several variable stars.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-09-28Last Updated: 2015-10-05

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Alternate Designations
 1988 UT = 1975 VP9 = 1991 PD16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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