Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]

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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2121681012172198 3.429e-08  
a 3.089802470971776 1.6903e-08 au
q 2.43424494756942 1.0274e-07 au
i 3.27311217124783 3.8898e-06 deg
node 136.2535760973202 7.3918e-05 deg
peri 166.39429356749 7.463e-05 deg
M 118.4633342129018 1.0975e-05 deg
tp 2458547.706303319128
(2019-Mar-05.20630332)
5.9569e-05 TDB
period 1983.784538621568
5.43
1.6278e-05
4.457e-08
d
yr
n .1814713205952023 1.4891e-09 deg/d
Q 3.745359994374132 2.0489e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1546  
   data-arc span      10842 days (29.68 yr)  
   first obs. used      1991-06-07  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52165  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 05:10:17  

Additional Information
 Earth MOID = 1.41707 au 
 Jupiter MOID = 1.50959 au 
 T_jup = 3.188 
[ 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 13.84   n/a E2021B10  
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

[ show close-approach data ]
Alternate Designations
 2001 EH9 = 1991 LW5 = 2000 AG252 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-19 15:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin