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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1163157337676269 3.4479e-08  
a 3.094039615957154 1.2035e-08 au
q 2.734154127720991 1.0752e-07 au
i 2.766189879161369 3.9526e-06 deg
node 211.6551190476513 7.5455e-05 deg
peri 163.9088175217372 7.7153e-05 deg
M 70.0384576179394 1.6144e-05 deg
tp 2458213.758030333738
(2018-Apr-05.25803033)		 8.8674e-05 TDB
period 1987.866578092564
5.44		 1.1598e-05
3.175e-08		 d
yr
n .1810986733050435 1.0566e-09 deg/d
Q 3.453925104193317 1.3435e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2852  
   data-arc span      44000 days (120.47 yr)  
   first obs. used      1898-11-14  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46997  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:24:12  

Additional Information
 Earth MOID = 1.73467 au 
 Jupiter MOID = 2.00938 au 
 T_jup = 3.212 
[ 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 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-January); 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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