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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457356.5 (2015-Nov-30.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09951374080253675 8.5391e-09  
q 2.05386455164202 1.8084e-08 au
tp 2457276.665967738965
(2015-Sep-11.16596774)
3.8116e-05 TDB
node 337.5883713509156 8.1398e-06 deg
peri 201.9630474821848 1.719e-05 deg
i 5.856589286355567 6.9088e-07 deg
  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
 Jupiter MOID = 2.45971 au 
 T_jup = 3.592 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.291642327959262E-17 -1.47969341080357E-16 7.184579604472249E-14 -3.621338260359847E-14 5.427058017398942E-14 -1.479228430269982E-15
q -1.47969341080357E-16 3.270158712522082E-16 -1.387157522391127E-13 7.748570154260557E-14 -1.114822869590889E-13 3.271481494940516E-15
tp 7.184579604472249E-14 -1.387157522391127E-13 1.452837008392514E-9 -1.895051432941459E-10 6.154836728479202E-10 -1.857143123305531E-12
node -3.621338260359847E-14 7.748570154260557E-14 -1.895051432941459E-10 6.625611095891918E-11 -1.180146503086026E-10 1.530968836215074E-13
peri 5.427058017398942E-14 -1.114822869590889E-13 6.154836728479202E-10 -1.180146503086026E-10 2.955078069274035E-10 -5.912314148338236E-13
i -1.479228430269982E-15 3.271481494940516E-15 -1.857143123305531E-12 1.530968836215074E-13 -5.912314148338236E-13 4.77315750423374E-13

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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