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25942 Walborn (2001 EH9)
Classification: Main-belt Asteroid          SPK-ID: 2025942
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2122500956933335 3.517e-08  
a 3.088968453460941 1.7409e-08 au
q 2.433334603620168 1.0633e-07 au
i 3.273057964061475 4.3307e-06 deg
node 136.2573922098755 8.0433e-05 deg
peri 166.3186984303144 8.1263e-05 deg
M 82.23767235343568 1.1646e-05 deg
tp 2458547.511741456821
(2019-Mar-05.01174146)
6.3936e-05 TDB
period 1982.981380779941
5.43
1.6764e-05
4.59e-08
d
yr
n .1815448210907586 1.5348e-09 deg/d
Q 3.744602303301714 2.1104e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1453  
   data-arc span      10733 days (29.39 yr)  
   first obs. used      1991-06-07  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53096  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:31:42  

Additional Information
 Earth MOID = 1.41814 au 
 Jupiter MOID = 1.51041 au 
 T_jup = 3.188 
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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 13.8   n/a MPO333057  
diameter diameter 7.979 km 0.411 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.076   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

25942 Walborn           Discovered 2001 Mar. 2 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Nolan R. Walborn (b. 1945) is a stellar spectroscopist specializing in the optical and ultraviolet morphology of hot, massive stars, such as O and B, Wolf-Rayet, and Luminous Blue Variables. His studies have included star forming regions in the Milky Way and the Magellanic Clouds.
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 2018-01-31Last Updated: 2018-02-05

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Alternate Designations
 2001 EH9 = 1991 LW5 = 2000 AG252 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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