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1681 Steinmetz (1948 WE)
Classification: Main-belt Asteroid          SPK-ID: 2001681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2049295447449976 2.8556e-08  
a 2.697240799716021 8.3394e-09 au
q 2.144496470562584 7.6906e-08 au
i 7.206351020712493 3.3821e-06 deg
node 94.36955425821196 3.4152e-05 deg
peri 1.488014349607966 3.5789e-05 deg
M 31.95064627170871 1.0326e-05 deg
tp 2458856.899763939073
(2020-Jan-08.39976394)
4.6276e-05 TDB
period 1617.998100642767
4.43
7.5038e-06
2.054e-08
d
yr
n .2224971709527879 1.0319e-09 deg/d
Q 3.249985128869459 1.0048e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3544  
   data-arc span      38812 days (106.26 yr)  
   first obs. used      1914-02-28  
   last obs. used      2020-06-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36303  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:34:55  

Additional Information
 Earth MOID = 1.16131 au 
 Jupiter MOID = 1.94053 au 
 T_jup = 3.327 
[ 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 11.3   n/a MPO502169  
diameter diameter 16.159 km 0.342 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 8.99917 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.161   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.878   0.073 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.65, mean=7.28, max.=7.92) deg.
U-B UB 0.447   0.074 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.65, mean=7.28, max.=7.92) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

1681 Steinmetz           Discovered 1948 Nov. 23 by M. Laugier at Nice.
Named in memory of Julius Steinmetz (1893-1965), pastor at Gerolfingen; orbit computer. Name proposed by O. Kippes, who found one of the identifications involving this planet.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5523Last Updated: 2006-03-21

[ show close-approach data ]
Alternate Designations
 1948 WE = 1926 YA = 1936 BE = 1939 VC = 1945 ED = 1957 YH = 1958 AE = A914 DB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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