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1542 Schalen (1941 QE)
Classification: Main-belt Asteroid          SPK-ID: 2001542
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1166241331858674 1.7257e-08  
a 3.093002236532775 1.0986e-08 au
q 2.732283531755191 5.5564e-08 au
i 2.766342866576491 7.472e-07 deg
node 211.6418643352063 7.4983e-06 deg
peri 163.7882428947197 1.1776e-05 deg
M 142.60964513675 1.1451e-05 deg
tp 2458213.426706608252
(2018-Apr-04.92670661)
6.1037e-05 TDB
period 1986.866914571768
5.44
1.0586e-05
2.898e-08
d
yr
n .1811897904986712 9.6533e-10 deg/d
Q 3.45372094131036 1.2267e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3625  
   data-arc span      44406 days (121.58 yr)  
   first obs. used      1898-11-14  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43142  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:32:43  

Additional Information
 Earth MOID = 1.73356 au 
 Jupiter MOID = 2.01269 au 
 T_jup = 3.212 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456193.5 (2012-Sep-23.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1111713183151069 1.7258e-08  
q 2.750573949105 5.5047e-08 au
tp 2456227.895996986105
(2012-Oct-27.39599699)
5.8857e-05 TDB
node 212.0105113455127 7.5039e-06 deg
peri 164.2596092908113 1.2052e-05 deg
i 2.765021440480613 7.4588e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3625  
   data-arc span      44406 days (121.58 yr)  
   first obs. used      1898-11-14  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43142  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:32:43  

Additional Information
 Jupiter MOID = 2.01269 au 
 T_jup = 3.212 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.978520551598132E-16 -9.355790084643794E-16 -5.374513561735747E-14 -4.232344412468813E-14 2.764332840245157E-14 5.613804500107037E-15
q -9.355790084643794E-16 3.03015129155404E-15 3.430684840879402E-13 1.279695885490357E-13 -4.939203705924599E-14 -1.714177673026598E-14
tp -5.374513561735747E-14 3.430684840879402E-13 3.464200190813293E-9 -2.231083818087455E-11 5.543971720463252E-10 3.407939569585876E-12
node -4.232344412468813E-14 1.279695885490357E-13 -2.231083818087455E-11 5.630893758569879E-11 -5.944856936255199E-11 -4.36565673799313E-12
peri 2.764332840245157E-14 -4.939203705924599E-14 5.543971720463252E-10 -5.944856936255199E-11 1.452585364371482E-10 4.955706601294421E-12
i 5.613804500107037E-15 -1.714177673026598E-14 3.407939569585876E-12 -4.36565673799313E-12 4.955706601294421E-12 5.563401915706972E-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 10.6   n/a MPO384761  
diameter diameter 42.374 km 0.273 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.516 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Li, B.; Zhao, H.; Han, X.L.; Klinglesmith III, D.A.; Hanowell, J. (2013) Minor Planet Bull. 40, 68-69.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.068   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1542 Schalen (1941 QE)          Discovered 1941-Aug-26 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1941 QE = 1927 BH = 1936 UL = 1940 LP = 1976 CA = A898 VD = A924 NA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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