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11461 Wladimirneumann (1981 EM18)
Classification: Main-belt Asteroid          SPK-ID: 2011461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1002165247991298 8.5443e-09  
a 2.280313953213724 6.2143e-09 au
q 2.051788813371679 1.8104e-08 au
i 5.859112674943811 6.9121e-07 deg
node 337.5247162829726 8.1315e-06 deg
peri 202.2455365732915 1.7098e-05 deg
M 190.1463044571659 1.1292e-05 deg
tp 2459793.920975984244
(2022-Aug-02.42097598)
4.0262e-05 TDB
period 1257.738612466361
3.44
5.1414e-06
1.408e-08
d
yr
n .2862279939820394 1.17e-09 deg/d
Q 2.508839093055769 6.837e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2021  
   data-arc span      15087 days (41.31 yr)  
   first obs. used      1979-10-18  
   last obs. used      2021-02-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45011  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:47:18  

Additional Information
 Earth MOID = 1.05637 au 
 Jupiter MOID = 2.45971 au 
 T_jup = 3.592 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.23   n/a E2021B10  
diameter diameter 3.480 km 0.719 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.00184 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.440   0.240 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11461 Wladimirneumann           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring.
Wladimir Neumann (b. 1981) is a researcher at the German Aerospace Center (DLR-Berlin) who studies water-rock differentiation of icy bodies applicable to interpreting Ceres data from the Dawn mission.
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 2017-03-12Last Updated: 2017-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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